Weathering Stability Research Articles

Novel fluorine-functionalized Ti3C2Tx/TiO2 hybrid coatings with enhanced weatherability, antifouling, and interfacial anticorrosion performances

As a valuable symbol of human cultural heritage, bronze inevitably endures varying degrees of corrosion due to environmental change. Thus, developing an efficient protective coating for bronze is crucial to ensure bronze relics receive more protection. Herein, a multifunctional organic-inorganic hybrid composite coating of 1 H,1 H,2 H,2 H-Perfluorodecyltriethoxysilane (PFDTES), Ti3C2Tx nanosheets and TiO2 nanoparticles (PFDTES@Ti3C2Tx/TiO2) are successfully prepared and coated the bronze, which exhibits excellent anti-corrosion, weathering stability and superhydrophobicity. The superhydrophobicity of coating is derived from introducing a low surface energy C-F bond. Furthermore, the corrosion protection ability can be improved by the barrier effect of Ti3C2Tx nanosheets, and TiO2 nanoparticles can enhance the weathering stability of coatings by providing exceptional abrasion resistance and ultraviolet (UV) resistance capabilities. Morphological examination, X-ray photoelectron spectroscopy, an accelerated aging test, and electrochemical measurements, among other methods, were used to research the protective effect and anticorrosion performance of organic-inorganic hybrid coatings. It can be found that the composite coatings have a large water contact angle (153°) and form a superhydrophobic surface. Furthermore, electrochemical results show that the superhydrophobic PFDTES@Ti3C2Tx/TiO2 coating has a higher low-frequency impedance modulus and lower current density than the uncoated substrate, indicating enhanced corrosion resistance. Based on solid and liquid pollutant tests, the PFDTES@Ti3C2Tx/TiO2 coatings also showed good self-cleaning and antifouling properties. And coating maintained good transparency without changing the bronze color and appearance. In conclusion, the superhydrophobic PFDTES@Ti3C2Tx/TiO2 composite coating has potential applications in the field of bronze protection.

Flame-Retarded and Heat-Resistant PP Compounds for Halogen-Free Low-Smoke Cable Protection Pipes (HFLS Conduits).

Conduits are plastic tubes extensively used to safeguard electrical cables, traditionally made from PVC. Recent safety guidelines seek alternatives due to PVC's emission of thick smoke and toxic gases upon fire incidents. Polypropylene (PP) is emerging as a viable alternative but requires modification with suitable halogen-free additives to attain flame retardancy (FR) while maintaining high mechanical strength and weathering resistance, especially for outdoor applications. The objective of this study was to develop two FR systems for PP: one comprising a cyclic phosphonate ester and a monomeric N-alkoxy hindered amine adjuvant achieving V0, and another with hypophosphite and bromine moieties, along with a NOR-HAS adjuvant achieving V2. FR performance along with mechanical properties, physicochemical characterization, and dielectric behavior were evaluated prior to and after 2000 h of UV weathering or heat ageing. The developed FR systems set the basis for the production of industrial-scale masterbatches, from which further optimization to minimize FR content was performed via melt mixing with PP towards industrialization of a low-cost FR formulation. Accordingly, two types of corrugated conduits (ø20 mm) were manufactured. Their performance in terms of flame propagation, impact resistance, smoke density, and accelerated UV weathering stability classified them as Halogen Free Low Smoke (HFLS) conduits; meanwhile, they meet EU conduit standards without significantly impacting conduit properties or industrial processing efficiency.

Covalent organic framework (COF)-decorated NH2-functionalized MXene sheets for thermomechanical and UV-shielding performance of epoxy nanocomposite coatings

Designing a multi-purpose epoxy nanocomposite with promising mechanical and weathering properties is yet a challenge to be explored. Meeting all above mentioned properties in one nanocomposite requires a rational design of hybrid nanomaterials benefiting from their synergistic effect. To this end, a robust imine-based COF was synthesized on an MXene substrate, forming an inorganic-organic assembly as filler for a multi-functional epoxy coating. As a proof of concept, the tensile strength of the loaded coating was almost twice the unloaded one, confirming the efficient stress transfer due to mechanically robust MXene and compatibility improvement of the hybrid assembly in the presence of the COF. Furthermore, the physical barrier of MXene, along with the nitrogen-rich structure of COF, resulted in efficient thermal insulating properties of the fabricated nanocomposite coatings. Moreover, the weathering test illustrated that the conjugated structure of the COF enhanced the epoxy film weathering stability after 7 days of UV exposure, which is promising among competitors. This high yield, facile processing, and rational design provide new insight into the application of MXene-conjugated COF in epoxy nanocomposite coatings.

Weathering resistance (UV-shielding) improvement of a polyurethane automotive clear-coating applying metal-organic framework (MOF) modified GO nano-flakes (GO-ZIF-7)

In this research, ZIF-7 particles were synthesized over graphene oxide (GO) nanosheets and characterized through various techniques. Then, the influence of the fabricated GO-ZIF-7 nano-hybrids on the weathering resistance and physical-mechanical performance of the PU coatings were investigated. The weathering resistance of PU/GO-ZIF-7, PU/GO, and control PU was examined with the aid of QUV accelerated weathering conditions via several methods such as recording gloss retention and contact angle changes, FTIR, colorimetric, FE-SEM, and AFM analysis. For the PU/GO-ZIF-7 nanocomposite coating exposed to accelerated weathering condition, the changes in carbonyl group relate peak and urethane linkage were less than the changes of these parameters for the control PU sample. The change in the color component (Δb*) decreased to 56.9% of PU/GO-ZIF-7 compared to control PU (70.9%). The change of root mean square (RMS) roughness value of PU/GO-ZIF-7 was less than that of control PU (from 9.44 to 8.04 nm vs. from 14.89 to 8.02 nm). As a result, after a long weathering exposure (UV-A), the fewer changes in aesthetic properties, chemical structure, and topology of the PU/GO-ZIF-7 coating led to less surface degradation and better weathering stability performance. The GO-ZIF-7 nano-hybrids revealed that they are capable of improving the photo-stability of PU coatings by the mixed mechanisms of absorbing UV rays and free radical scavengers. The physical-mechanical characteristics of the nanocomposites were analyzed using dynamic mechanical thermal analysis (DMTA) and tensile tests. The addition of GO-ZIF-7 to PU led to an above 70% and 85% increase of elongation at break and toughness concerning the control PU, respectively.

Performance of a nanotextured superhydrophobic coating developed for high-voltage outdoor porcelain insulators

We live in an era of striking advancements in various domains of science and technology, where separate fields and specializations are overlapping into new horizons. This cooperative approach is emerging rapidly in polymer science by employing the organic and physical chemistry, materials science, as well as electrical and mechanical engineering to collaborate and develop uniquely innovative materials. In outdoor high voltage power equipment, various problems such as flashover, rain, icing, pollution, and UV can compromise the performance of insulators thereby distorting the reliability of the entire system. Superhydrophobic coatings are sought-after candidates owing to their ultra-non-wettable, easy-to-clean, and anti-ice character. However, the performance of superhydrophobic coatings when they are subjected to high-voltage fields is still lacking sufficient research. Here, we aimed at designing a robust and novel non-fluorinated superhydrophobic coating in order to increase the effective life-span of high-voltage insulators by preventing and/or delaying the possible arcing and flashover driven damages. The electrical properties of the coating were investigated through various and comprehensive test methods. The coating showed high thermal and desirable weathering stability. Compared with bare porcelain in dry, wet, and polluted conditions, the superhydrophobic coating successfully increased the flashover voltage. Moreover, the superhydrophobic coating exhibited low leakage currents through the condensation test when exposed to high humidity conditions. With leakage currents of as low as 20 mA after three continuous steps of voltage increase, the superhydrophobic coating showed less tracking and erosion lines than the pristine coating in an adapted inclined plane test for thin films.

Infrared Efficiency and Ultraviolet Management of Red-Pigmented Polymethylmethacrylate Photoselective Greenhouse Films.

Red-pigmented photoselective polymethylmethacrylate (PMMA) films were prepared by casting from polymer/chloroform solution. The films were doped with efficient red fluorescent perylene dyes specialized for plastic coloration, namely KREMER 94720 and KREMER 94739, which have excellent weathering stability and a high fluorescence quantum yield. The effect of the doping concentration was studied using the atomic force microscope (AFM), optical transmission, color measurement, time-resolved fluorescence, and Fourier transform infrared spectroscopy (FTIR). The obtained results suggested the potential usefulness for photoselective greenhouse cladding applications as the lowest doping concentration (10−5 wt%) displaying the UV-open effect, whereas the best UV-blocking and thermic effects were obtained for the highest doping concentration (10−1 wt).

Geochemistry of a spheroidal weathering profile in a tropical mountainous landscape, Rio de Janeiro, Brazil

Boulders are an important material in debris flow and their source is coupled with spheroidal weathering profiles that produce corestones. The goal of this work was to establish the geochemical transformations that produced corestones and distinguished them from the surrounding grus in two tropical granite weathering profiles (P1 and P2). Sampling was not performed in a vertical profile; instead, we gathered 13 (P1) to 16 (P2) samples displaying different weathering degrees (corestone and saprolite) and spatial positions in the profiles. We conducted the geochemistry (EDXRF/EDX and INAA) and mineralogy (petrography and XRD) of the samples. The CIA values ranged from 46 (corestones) to 93 (saprolite). Granite spheroidal weathering under a tropical mountainous slope develops mostly due to feldspar weathering (foremost plagioclase) in the following sequence: porosity growth, kaolinite, and gibbsite crystallization. Zircon weathering stability and its probable mobility as grain along the weathering profile play an important role in REE concentration. Spheroidal weathering is mainly a lixiviation process, yet specific locations (below the individualized corestones) presented REE enrichment due to translocation. They are hosted mainly by clay minerals and, to some extent, by amorphous Fe oxyhydroxide. The evolution of spheroidal weathering results in a vertical patchy weathering profile.

Synthesis of NIR-Reflective Oxide Ceramic Orange Pigment from MgO and Leucoxene

A series of NIR-reflective brownish orange pigments comprising various amounts of Fe2O3 have been synthesized by a conventional solid-state reaction at 1100 °C. Magnesium titanate base pigment was synthesized from MgO and leucoxene mineral which was employed as TiO2 source. The resultant pigment had brownish gray appearance (L*a*b* = 68.67, 7.83, 18.68, respectively) and NIR reflectance of 81.0%. Incorporating the magnesium titanate pigment with various amounts of Fe2O3 (molar ratio (x) = 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) resulted in a change of color hue to brownish orange, and a change of NIR reflectance from 81.0 to 41.1% upon the increase of Fe2O3 content. Optical bang-gap energies derived from diffused reflectance spectra reduced from 2.75 eV for the magnesium titanate to 2.25, 2.20, 2.10, 1.90, 1.70 and 1.60 eV for pigments incorporated with 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0 mole Fe2O3, respectively. At the optimum synthesis condition (x = 0.3), the pigment exhibited light brownish orange color hue (L*a*b* = 52.02, 23.94, 39.37) and NIR reflectance of 80.1%. An accelerated QUV weathering test according to the ASTM G154-16 standard revealed color fading (ΔE*) of only 0.95 indicating excellent weathering stability.

Application of Waste Plastic Films in Road Infrastructure and Construction

Recycling waste synthetic resins, including rigid and film plastics, is a pressing issue worldwide due to the issues associated with waste treatment. Using products originating only from plastic wastes could be a promising way to improve the waste recycling rate and address plastic consumption. This study presents the applications of waste plastic films (WPFs) in urban infrastructure and construction materials, especially bearing loads. WPF-recycled products (WPF-RPs) were evaluated for mechanical properties, including strength (compressive and tensile), thermal expansion coefficient, accelerated weathering, dynamic stability, and environmental aspects, such as the presence of hazardous substances. Subsequent tests confirmed moderate strength, good weathering stability against solar irradiation, and superior road pavement vehicle load through wheel-tracking tests compared with the standards for asphalt. Additionally, hazardous substances were mostly not detected or were under permissible limits in the composition and leachate contents of WPF-RPs. After using temporary pavement blocks (TPBs) from WPFs at a field site for one month, we conducted slip resistance tests which gave a result of ~33 British pendulum number, indicating the possible application of WPF-RPs in low-speed driving sections, according to the Korean standards of the Ministry of Land, Infrastructure and Transport. Moreover, it was confirmed that fastening structures installed between the TPBs can improve backfilling and compaction defects. This practical research highlights the possible applications of products produced from WPFs for infrastructure development, such as filling materials for burial pipes or tubes; however, these potential aspects should be tested further.

Enhancing the UV/heat stability of LLDPE irrigation pipes via different stabilizer formulations

AbstractHerein different stabilizer formulations of linear low‐density polyethylene (LLDPE) against UV‐ and heat‐initiated degradation are described. The project aims at outdoor applications, such as irrigation piping and profiles, in the Middle East desert regions, where long‐term weathering stability due to high temperatures and solar radiation is important. Two UV/heat formulations, without and with carbon black (CB) as pigment, were incorporated into LLDPE by melt compounding. Neat LLDPE and the stabilized compounds were exposed to accelerated UV and heat aging. Morphological analysis through scanning electron microscopy of the UV‐exposed neat LLDPE showed more severe surface cracking compared to the CB‐containing LLDPE, while all stabilized compounds did not show any surface degradation. Crack formation was less visible for the thermally aged samples. A significant decrease in molecular weight (MW) was observed for the neat UV‐exposed LLDPE, while both unpigmented stabilized compounds showed little change in MW. Mechanical properties, thermal analysis, and carbonyl index results supported the morphological results, which confirmed that CB alone was slightly more effective in protecting the LLDPE against UV initiated degradation, but performed worse against thermal initiated degradation. UV1 and UV2 compounds were efficient against both UV‐ and heat‐initiated degradation, with UV1 performing better for unpigmented compounds, and UV2 for the pigmented ones.

Enhanced outdoor durability of polyurethane nanocomposite coatings with green reduced graphene oxide nanoplatelets

Obtaining the highest possible level of weathering resistance to protect the polymeric composites against sunlight and free radicals is the primary function of every exterior composite, such as polyurethane (PU). In this paper, a typical PU matrix was modified by two differently reduced graphene oxide nanosheets to enhance long-term weathering stability. The synthesized graphene oxide nanosheets were reduced by Nettle leaves extract as a green reductant and hydrazine as a typical reducing agent. The graphene oxide and two reduced species were embedded in PU to investigate their impact on weathering stability. Several techniques were employed to assess the weathering performance during 1400 h exposure to artificially accelerated conditions. Achieving superior weathering performance approved the effective role of reduced graphene oxide (especially green reduced) in elevating weathering stability of PU nanocomposites. The active mechanisms involved in such improvement were extensively discussed.

Weathering Stability and Durability of Birch Plywood Modified with Different Molecular Weight Phenol-Formaldehyde Oligomers.

This study investigated the effect of phenol-formaldehyde (PF) resin treatment on the weathering stability and biological durability of birch plywood. Silver birch (Betula pendula) veneers were vacuum-pressure impregnated with four different PF resins with average molecular weights (Mw) of 292 (resin A), 528 (resin B), 703 (resin C), and 884 g/mol (resin D). The aging properties of PF resin modified birch plywood were analyzed using artificial weathering with ultraviolet (UV) light, UV and water spray, and weathering under outdoor conditions. The same combinations of PF-treated plywood specimens were then tested in soil-bed tests to determine their resistance against soft-rot wood decay. It was not possible to compare weathering processes under artificial conditions to processes under outdoor conditions. However, the weathering stability of birch plywood treated with PF resins A, B, and C, scored better than plywood treated with commercial resin D (regardless of solid content concentration [%]). Results from unsterile soil bed tests showed improvements in resistance to soft-rot wood decay compared to untreated plywood and solid wood. Mass loss [%] was lowest for birch plywood specimens treated with resin of highest solid content concentration (resin D, 20%). Provisional durability ratings delivered durability class (DC) ratings of 2–3, considerably improved over untreated solid wood and untreated birch plywood (DC 5).

Development of value‐added polyethylene grades with extended service lifetime: Weathering resistant flame retarded materials for outdoor applications

AbstractThe current article deals with the development of different novel, tailor‐made polyolefin formulations exhibiting both low flammability and high weathering resistance, so as to provide value‐added polyethylene grades with extended service lifetime. Two low‐density (LDPE) and one linear low‐density (LLDPE) polyethylene grades were modified via melt compounding with an additive system comprising: (a) a nitrogen‐phosphorous intumescent system for flame retardance and (b) a hindered amine light stabilizer and a benzophenone‐type UV absorber for UV/heat stabilization, at a total loading of 30–35 wt%. The target was to reach V0 classification in UL94V flammability tests, while to a large extent maintaining the mechanical properties, such as, tensile and impact strength of the investigated polymers, thus ensuring that the additives do not interfere significantly with the material quality. Subsequently, the compounds were subjected to separate artificial UV and heat aging at 100°C for 1500 h; the formulations showed good flame retardance, even after prolonged artificial weathering, but there was an observable, although acceptable, decrease in the mechanical properties. Nevertheless, all the results show that the developed polyethylene compounds are very promising for outdoor applications, such as, irrigation piping and profiles, where long‐term weathering stability is important, and where flame retardance is important for safety during storage.

Durability of PS-Polyurethane Dedicated for Composite Strengthening Applications in Masonry and Concrete Structures.

Polyurethane flexible joints (PUFJ) and fiber reinforced polyurethanes (FRPU) have shown great potential in the repair and protection of masonry and concrete structures. However, some questions have been raised about the durability of such solutions. The accelerated weathering and thermal stability tests carried out so far have shown the mechanical stability of PS-polyurethane in temperatures up to 100 °C and some UV-induced surface degradation. The paper reports the results from tensile tests of PS-polyurethane, used in the technologies mentioned above after being subjected to aging in different corrosive factors, a thermal analysis of unaged polymer which consists of DSC-TGA and dilatometry studies, and SEM-microscopy observation of the specimens with the indication of the elemental composition (EDS). PS-polyurethane showed low sensitivity to weathering with exposition to UV-radiation, some reactiveness to aqueous environments of a different chemical nature, and resistivity to soil and freezing in both air and water. SEM observations indicated changes in the composition of mineral fillers as the main effect of immersion in different water solutions. DSC-TGA studies showed the thermal stability of PS-polyurethane up to 200 °C and degradation proceeding in five stages. Dilatometry studies revealed that the first-degree thermal degradation over 200 °C causes a serious loss of mechanical properties.

Durability of Wood Exposed to Alternating Climate Test and Natural Weathering

The use of wood-based materials in the automotive industry is currently under discussion and investigation. One of the major material requirements for such applications is sufficient weathering stability. This can be demonstrated by an accelerated aging process in which the samples are exposed to changing climatic conditions and a spray mist of an aqueous NaCl solution. The effects of media salt (NaCl) on the mechanical and physical properties of wood have scarcely been investigated. The presented study investigated the changes in bending strength (MOR), modulus of elasticity (MOE), and impact bending strength (α) of naturally and artificially weathered oak (Quercus spp.) and birch (Betula pendula Roth) wood. The tests provided comparable results. The decrease under natural weathering of oak was 3.73%, 4.69%, and 6.45% for MOR, MOE, and α. Under artificial weathering the decrease observed for oak was 7.33%, 10.87%, and 16.29% and 3.2%, 8.21%, and 4.03% for birch respectively. It is remarkable that α increased for birch wood at the beginning of the artificial weathering cycles. The penetration of the aqueous NaCl solution into the wood substance resulted in an increase in the wood’s equilibrium moisture content (EMC), which can be explained by the stronger hygroscopic properties of NaCl compared to wood. The higher impact strength at the beginning of artificial weathering can be partly explained by this increase in EMC. In order to investigate the penetration behavior of salt into the wood substrate, the artificially weathered samples were examined by means of energy dispersive X-ray analysis (EDX) and it was shown that the salt concentration changes significantly over the weathering cycles and sample cross-section.

Influence of organic UV absorber on the accelerated weathering stability of UV curing coating based on acrylate urethane resin

AbstractThe purpose of this paper is to evaluate the photoprotective efficiency of organic UV absorber Tinuvin 384 (T384) on the photocurable acrylate urethane coating under the accelerated weathering condition. The coatings without and with 2 wt.% T384 were examined by UV/CON accelerated weathering testing device. The aging of the coatings was assessed by IR and FE‐SEM analysis as well as the measurement of mechanical and weight loss. The obtained results showed that due to the photoprotection of T384, the urethane acrylate coating was stable under the effect of accelerated weathering factors. After 48 cycles of aging, the CH and CNH groups, the abrasion resistance and the weight of the paint films containing 2 wt.% T384 were slightly decreased. Its surface was damaged just a little, while that of the coating without T384 was severely degraded.

Silica Aerogel Thermal Insulation Coating as Commodity Usage

Silica aerogel-based thermal insulation coating (SA-coating) was prepared from a commercial acrylic binder. The purpose of this investigation is to determine the effectiveness of SA-coating with the application in energy-efficient home design for temperature insulation purposes. The weather acceleration test and thermal insulation property of SA-coating were investigated and compared to the original commercial binder. The weather acceleration test of SA-coating showed equivalent weathering stability and robustness compared to the original binder. The thermal insulation property was performed from an in-lab setup, called temperature difference (TD) measurement. In a closed chamber, without air circulation, the surface temperature with SA-coating was reduced by as much as 26 degrees from 90°C to ∼64°C. More so, if TD measurement was performed in a ventilated area, the temperature can be reduced from 50°C to 36°C (room temperature was 31 °C). The thermal conductivity of the coating at different temperatures was also measured. The water contact angle measurements and the scanning electron micrographs showed that SA-coating can be made hydrophilic to hydrophobic by simple abrasion.

Increased reliability of modified polyolefin backsheet over commonly used polyester backsheets for crystalline PV modules

ABSTRACTThe weathering stability of polymeric backsheets is very important for the reliability of photovoltaic (PV) modules. In addition to reliability, cost reduction and sustainability are upcoming challenges the PV backsheet industry is facing with. The most commonly used material for PV backsheets is poly(ethylene‐terephthalate)‐PET. However, PET is in general very sensitive to hydrolysis, which leads to chain scission and causes embrittlement, cracking, delamination, and dimensional instability of the backsheet. Compared to that newly developed modified polyolefin backsheets have favorable selective permeation properties and high mechanical flexibility, which could be key properties for backsheets in terms of higher PV module reliability. In this work, the weathering stability of PET/fluoropolymer backsheet and an alternative coextruded polyolefin‐backsheet was investigated in terms of thermal and mechanical stability. Both materials were artificially aged and the changes caused by aging were investigated. The polyester‐based backsheet showed embrittlement and reduced elongation at break for 70%. The polyolefin‐based backsheet retained its mechanical flexibility even after 2000 h of aging under damp‐heat conditions, with no significant physical or chemical aging processes occurring. The comparison of the results of both backsheets suggests that the polyolefin backsheet is a promising candidate for the reduction of cracks and delamination in the field. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48899.

Newly developed thermoplastic polyolefin encapsulant–A potential candidate for crystalline silicon photovoltaic modules encapsulation

Thermoplastic polyolefin (TPO) is a newly developed non-crosslinking material for photovoltaic (PV) module lamination as an alternative to ethylene–vinyl-acetate (EVA) encapsulant. This article assesses its applicability as an encapsulant material. We report the results of various characterization tests for discoloration, optical, and thermal properties degradation before and after the UV accelerated test. To evaluate its weathering stability, the UV-365 acceleration test has been conducted on the glass to glass TPO laminate, with EVA as a benchmark. In 50 days of weatherability tests, the transmittance of EVA significantly reduced while TPO remained almost unchanged. The discoloration of TPO is around nine times slower than that of EVA. The analytical tools like Raman spectroscopy, fluorescent imaging, and spectra have been used to assess the degradation behavior, which indicates a clear difference between EVA and TPO based encapsulant. Thermal properties (glass and melt transitions) of TPO and EVA have been studied through heat-cool-heat cycle testing by differential scanning calorimeter (DSC). This test confirmed that TPO thermal properties remain almost unchanged, whereas EVA shows significant changes after 50 days of UV exposure. In the thermogravimetry analysis (TGA) results, we found that TPO is stable till a significantly higher temperature than EVA. Additionally, the 180° peel adhesion test suggests that TPO has a higher adhesion strength than EVA. This work will help in understanding the applicability of newly developed non-crosslinking TPO as a potential replacement for EVA for the PV modules.

Effects of weathering aging on mechanical and thermal properties of injection molded glass fiber reinforced polypropylene composites

The effect of weathering aging on the degradation behavior of injection molded short glass fiber reinforced polypropylene composites (GFPP) is studied. First, the effect of outdoor weathering on mechanical properties of GFPP composite was investigated by tensile, flexural, and impact tests. Furthermore, to clarify the degradation behavior under natural weathering environments, differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) measurements were carried out to analyze the structural and molecular changes during weathering aging. The results show that weathering aging has a significant influence on changes in mechanical properties, melting temperature and the degree of crystallinity of PG6N1 without added carbon black and UV absorbing agent. Those degradations not only occurred on the surface of GFPP but also proceeded to the inner matrix and interface. However, GFPP GWH42 with added carbon black and UV absorbing agent shows excellent weathering stability.