Continuous aramid fiber/unsaturated polyester resin composites with excellent interfacial and mechanical properties

Development and mechanical characterization of jute fibre and multi-walled carbon nanotube-reinforced unsaturated polyester resin composite

Nano-silica treated with different kinds of coupling agent (KH550, A-143, A-151) was used to modify the surface condition of glass fiber, and then, the modified glass fiber/unsaturated polyester resin (UPR) composites materials were prepared. Scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), and impact test were used to characterize the composite materials’ structure and properties. The morphology of composite materials shows that the adhesion between nano-silica and glass fiber is improved when silane coupling agent is added in. The DMA and impact test results show that silane coupling agent (especially KH550 and A-151) could effectively improve the composite’s mechanical properties. When the dose of KH550 was 0.1% (m:m), the storage modulus and impact strength reached the maximum.

Ultra-Strong, Ultra-Tough, Transparent, and Sustainable Nanocomposite Films for Plastic Substitute

The goal of this paper is to investigate the interfacial structural and related mechanical properties of granular SiO2/unsaturated polyester resin composites. The coupling agent WD-SC101 was chosen to enhance the compatibility between the reinforcing quartz and unsaturated polyester resin. The nanoindentation technique was used to investigate interfacial mechanical properties of artificial quartz stones. The effects of the interfacial thickness on mechanical properties of the material were evaluated using finite element analysis. It is shown that the interfacial thickness of the specimen without coupling agent is about 0–600 nm; in contrast, the interfacial thickness with adding 3‰ coupling agent is about 600–1200 nm. After the coupling agent reacted with the surface hydroxyl of the quartz reinforcement, the thickness of high-modulus interface increased and the bending fracture strength reduced with adding coupling agent.

Conventional glass fiber/unsaturated polyester resin (UPR) composites were fabricated by four layers to verify the optimum fabrication conditions such as the initial curing temperature, fiber changes and vacuum. Before that another optimum condition for stir mixing multi-walled carbon nanotubes (MWCNTs) into UPR was further investigated based on the initial curing temperature. Exothermic temperature measurements, density measurements, thermo-gravimetric analysis and tensile testing were utilized to identify the effects of these factors on the UPR and composite laminates. Consequently, an initial curing temperature range of 25°C–35°C was recommended to start the polymerization. In addition, the fiber combination and applying vacuum were also represented as the other optimum conditions in composite fabrication. The optimum initial curing temperature was applied for modifying UPR with 0.1 wt.% MWCNTs. Then, all of optimum conditions were used to fabricate glass fibers/modified UPR composites. The higher tensile strength and modulus of fiber combination with the adding of MWCNTs were obtained at 25.29 MPa and 1.39 GPa, respectively. The results indicate that simple MWCNT mixing can be used in industry due to the reduction of the fabrication time and better tensile properties.

Comparative study of different bonding interactions on the interfacial adhesion and mechanical properties of MXene-decorated carbon fiber/epoxy resin composites

Strategic design unsaturated polyester resins composites with excellent flame retardancy and high tensile strength

Beyond natural tooth enamel

Many supplementary investigations are necessary to accomplish the central demand for a chemical resistance test method of glass fiber reinforced resins. The effect of sulfuric acid (H 2 SO 4 - concentration 10%) on mechanical and chemical properties of malti layers random glass fiber reinforced with polyester resin composite were studied. The samples were immersed on the chemicals for six weeks. The effect of the sulfuric acid on the mechanical properties (tensile, bending, hardness) and physical properties (absorbility) has been studied on the random glass fiber polyester composite. The results showed the mechanical properties in most cases decreased such as the tensile, bending and hardness and the absorbility 5.3%.

Impact of gamma radiation and multi-walled carbon nanotubes on the mechanical and acoustical properties of reinforced sisal fiber/polyester resin composites

Nanoscale Mapping of Extrinsic Interfaces in Hybrid Solid Electrolytes

Jute fiber (hessian cloth)-reinforced unsaturated polyester matrix composites (50 wt% fiber) were fabricated by hand lay-up technique. Tensile strength (TS), tensile modulus (TM), bending strength (BS), bending modulus (BM), elongation at break (Eb%), and impact strength (IS) of the composites were found to be 42 MPa, 2.7 GPa, 36 MPa, 2.1 GPa, 3%, and 21 kJ/m2, respectively. On the other hand, TS, TM, BS, BM, and Eb% of E-glass mat reinforced unsaturated polyester resin (UPR) composite were found to be 70 MPa, 3.8 GPa, 80 MPa, 2.5 GPa, and 5%, respectively. Then E-glass/UPR based composites (50 wt% fiber) were fabricated and the mechanical properties were compared with those of the Jute/UPR based composites. It was observed that E-glass fiber-based composites showed almost double mechanical properties as compared to jute composites. The interfacial shear strength of the jute and E-glass fiber-based systems was investigated and found to be 21 kJ/m2 and 21.56 kJ/m2, respectively, measured using the single-fiber fragmentation test. After flexural testing, fracture sides of both types of the composites were studied by scanning electron microscope (SEM) and the results showed that poor fiber-matrix adhesion for Jute/UPR based composites when it compared to that of the E-glass fiber composites. However, it was found that the E-glass fiber based composite has better strength as compared to jute fiber composite.

Novel antibacterial low-shrinkage-stress resin-based cement

Effect of different sintering additives type on Vat photopolymerization 3D printing of Al2O3 ceramics

Cytocompatible chitosan based multi-network hydrogels with antimicrobial, cell anti-adhesive and mechanical properties