Solid Resin Research Articles

Agarwood in the forest community and its potential depletion in West Papua

Agarwood or eaglewood is a trading name of a solid resin from the two genera Aquilaria and Gyrinops which belongs to the Thymeleacea. The declining population of agarwood in natural forests placed the commodity regulated in Appendix II of the Convention on International Trade in Endangered Species (CITES). Indonesia as one of the habitats of those two genera and also the main exporting country of agarwood has an interest in ensuring the sustainability of agarwood. This study aims to provide an updated habitat of agarwood-producing trees and to estimate the potential density of the agarwood species. Research conducted in the forest of Natural Tourism Park of Beriat, West Papua, showed that Aquilaria filaria grows well in the forest. Five adult individuals were found in karst forest where 72% were dominated by small trees (DBH <20 cm). In terms of forest communities, Aquilaria's basal area reaches 1.9% of the total basal area and has a low importance value of 0.016 in the first dimension of Principal Component Analysis (PCA). The overall potential for agarwood-producing trees was estimated to be only around 2.50 and 2.89 for tree and seedling per hectare, respectively. The potential density is decreased when compared to the estimated density carried out 20 years ago which was estimated at around 4.33 trees per hectare. Efforts to protect agarwood, one of which is by determining trade quotas, need to be carried out optimally in order to minimize the decline in agarwood populations in their natural forests.

Impacts of water-organic solvents on polymerization of the sugars and furans in bio-oil

Polymerization is one major issue during acid-catalyzed conversion of sugars/furans to platform chemicals. Reaction medium is one of the main factors impacting the tendencies of sugars/furans towards polymerization. In this study, conversion of sugars (fructose/glucose/xylose/xylan) and furans (hydroxymethylfurfural (HMF)/furfural/furfuryl alcohol (FA)) over a solid acidic resin catalyst in various water-organic bi-solvents (toluene, chloroform, n-butanol, tetrahydrofuran (THF), dimethyl sulfoxide (DMSO) and ethyl acetate (EA)) were investigated. The results showed toluene/chloroform as the co-solvent did not suppress the polymerization of fructose, HMF, furfural and FA while diminished the formation of LA from fructose/HMF. The organic co-solvents remarkably affected properties of the coke formed. The presence of aprotic organic solvents tended to retain the CO group in the coke formed and affected its thermal stabilities and evolution of the functionalities. Additionally, polymerization tendency of the furans with the distinct structures showed very different sensitivity with the water in reaction medium.

Properties of Plywood Produced with Urea-Formaldehyde Adhesive Modified with Nanocellulose and Microcellulose

Urea-formaldehyde adhesives are widely used in the wood-based materials industry. The study investigates the possibility of using cellulosic particles as a filler that modifies the properties of the resin and consequently improves the properties of plywood. Moreover, the study also examines the differences between microcellulose and nanocellulose used as a filler for UF adhesive. Based on the investigations, it was found that the addition of MFC and NCC significantly affected the curing process and rheological behaviour of adhesive mixtures. Modification led to increase of viscosity and extension of a gel time caused by lowering solid content of the resin. The experimental and reference plywood were tested in terms of bonding quality and mechanical properties such as modulus of elasticity and modulus of rigidity in accordance with applicable standards. The results of the tests confirmed that both the amount and the type of modifier added to the resin had a significant effect on the properties of plywood. The bonding quality and the above mentioned mechanical properties improved in all variants of modification; however the most effective was the addition of NCC in the amount of 10 %/100 g of solid resin. The slight decrease of formaldehyde emission was only observed for 5 % cellulosic particles added to 100 g of solid UF.

High yield of isosorbide production from sorbitol dehydration catalysed by Amberlyst 36 under mild condition

Isosorbide (ISB), one of the important polyols, can be produced through the sequential intramolecular dehydration of sorbitol (SL) derived from an abundance renewable biomass resources. The advantages of its rigid structure have granted the ISB a wide application in the polymer industries. An acidic catalyst in the liquid phase was conventionally used in the dehydration process. This homogeneously catalysed reaction gave low ISB yield and required additional downstream processes to separate the catalyst. The present study employed solid acidic ion exchange resin, Amberlyst 36 in the SL dehydration at a mild condition. The effect of important operating parameters such as stirring speed, catalyst loading, temperature and reaction time was investigated. The increase of catalyst loading from 5 to 7 wt% did not significantly affect the ISB yield. A higher temperature increased the reaction rate whereas a prolonged reaction time increased the conversion of SL and yield of ISB to the maximum. In terms of giving a higher ISB yield during SL dehydration, AM 36 was found to outperform the other resin catalysts reported in the literature. Both SL conversion and ISB yield of >99% were recorded after a 4 h reaction at 423 K with catalyst loading of 5 wt% and stirring speed of 300 RPM. The reaction kinetics was evaluated under a mass transfer resistances free condition at the reaction temperature ranged from 373 K to 423 K. The kinetic data well fitted to the Langmuir-Hinshelwood (LH2) model that took side reaction into account. The activation energy for dehydration SL to ST, dehydration ST to ISB and dehydration of SL to other side products such as humins were 109.22, 109.46 and 104.17 kJ/mol respectively.

Indirect Additive Manufacturing of resin components using polyvinyl alcohol sacrificial moulds

Abstract Using additive manufacturing (AM) as aid to manufacture parts with traditional manufacturing methods is one of the many applications of AM, yet one of the less investigated. In this article, for the first time, a way to produce soluble AM customizable sacrificial moulds for resin casting is explained. The moulds are produced through fused filament fabrication using polyvinyl alcohol (PVA) as raw material. After curing, the moulds are dissolved in water leaving the solid resin parts away. The results of indirect additively manufactured resin components in PVA moulds are examined, supported by surface and dimension analysis on prism-like sample parts for different sets of process parameters. Possible applications and limitations of the technique are exposed, as well as recommendations for future works.

Çimento Esaslı Odun Kompozit Malzemelerin Üretim Prosesi ve Özellikleri Üzerine Bir Çalışma

Due to the growing environmental concern, lignocellulosic materials have become a common substitute for the conventional reinforcement element in composite strcutures. However, these natural sources are preferred to cost efficient and to increase mechanical performances. In a cement bonded composites, wood is incorporated as an aggregate in the mineral matrix (as fibres, sawdust, shavings or particles), and cement acts as a binder. These are employed due to their ease of production, and the enhanced biodegradability, leading to applications for sustainable purposes in construction applications. Wood-cement composites are considerably better performance on high fire, weathering and bio-deterioration risk applications to which solid wood and resin bonded composites are vulnerable. However, the vast of literature on cement-wood bonded composites has already been reviewed and pointed by a number of researchers. Many valuable fundamental informations have already established for utilizing wood for these products. A comprehensive results was to investigate some wood species that are abundant resources in many countries, for their suitability for manufacturing such composites.

High‐toughness, environment‐friendly solid epoxy resins: Preparation, mechanical performance, curing behavior, and thermal properties

ABSTRACTThe development of a facile and efficient approach to prepare high‐toughness epoxy resin is vital but has remained an enormous challenge. Herein, we have developed a high‐performance environment‐friendly solid epoxy resin modified with epoxidized hydroxyl‐terminated polybutadiene (EHTPB)viaone‐step melt blending. The characterization, mechanical performance, curing behavior, and thermal properties of EHTPB‐modified epoxy resin were investigated. EHTPB‐modified epoxy resin exhibited excellent toughness with a 100% increase in elongation at break of tensile than that of neat epoxy resin. The transfer stress and dissipated energy in the rubber phase were predominant mechanisms of toughening. The toughening effect of EHTPB on solid epoxy resin was better than that of some of the previously reported liquid epoxy resins. Meanwhile, at 10 wt % of EHTPB loading, the EHTPB‐modified epoxy resin displayed high strength and 22 and 101% improvement of flexural strength and impact strength, respectively. Moreover, at 10 wt % of EHTPB loading, the activation energy of EHTPB‐modified epoxy resin for curing reaction decreased from 73.89 to 65.12 kJ·mol−1, which is beneficial for the curing reaction. Furthermore, EHTPB‐modified epoxy resin had a good thermal stability and the initial degradation temperature increased from 249 to 313 °C at 10 wt % of EHTPB loading. This work provides a simple‐preparation and highly efficient and large‐scale approach for the production of high‐toughness environment‐friendly solid epoxy resins. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2020,137, 48596.

Conversion of Cellulose to Levulinic Acid/Ester over an Acid Catalyst: Impacts of Dispersion of Hydrogen Ions on Polymerization Reactions

Polymerization is a major challenge in the conversion of cellulose to platform chemicals, such as levulinic acid. In this study, the distinct dispersion patterns of hydrogen ions in a solid acidic resin catalyst (D008 catalyst) and H2SO4 catalyst on the polymerization reactions during conversion of cellulose to levulinic acid/ester were investigated in water and in alcohol medium. The results showed that the distinct patterns for dispersion of hydrogen ions impacted both the efficiency for conversion of cellulose and the tendency for the polymerization reactions. The hydrogen ion in D008 concentrated in pores or the local area of the catalyst, creating steric hindrance for cellulose to access the hydrogen ions but facilitated polymerization of glucose. The homogeneous dispersion of the hydrogen ion in H2SO4 facilitated conversion of cellulose and minimized the polymerization reactions, especially in alcohol medium. When alcohol is used as a reaction medium, the polymerization reaction could be effectively suppressed. Furthermore, alcoholysis was more efficient than the hydrolysis for converting cellulose to levulinic acid/ester. The reaction medium also affected properties of the coke formed. In water, the coke formed contained abundant carbonyl functionalities with a higher thermal stability. In alcohol, the coke formed had less carbonyl functionalities but the thermal stability was lower.

Strain sensor with low thermal conductivity concealing resin for enhanced detection sensitivity and improved spatial resolution

An advanced thermoresistive strain sensor was proposed and realized with a concealing layer in this work, in which the heat transfer by conduction and convection for Joule heating-induced thermal energy were different from the existing sensor. Because the existing sensor was with a structure concealed by air and the proposed concealing layer in the advanced sensor was composed of polymeric materials, studies were made on the impacts generated by different concealing materials. Results indicated that conductions of heat transfer of solid spin-on glass and resin were that, although stronger than that of gaseous air, the heat transfer by convection in solid materials were negligible for enhanced performance. Results also indicated that the sensor with a solid concealing layer outperformed in detection sensitivity than the sensor without a concealing layer, and a low thermal conductivity solid concealing layer outperformed a high thermal conductivity solid concealing layer. On average, the detection sensitivity was enhanced by 46.32% and 58.57% for tension and compression in terms of background temperature-based gauge factor, respectively. Theoretical designs, numerical simulations, fabrications, analyses, and discussions were comprehensively provided in this work with additional case study on practical application of microscopic strain in a slightly deformed plastic substrate in a roll-to-roll manufacturing system as the proof-of-concept.

Evaluation of polydentate picolinic acid chelating ligands and an \u03b1-melanocyte-stimulating hormone derivative for targeted alpha therapy using ISOL-produced 225Ac

BackgroundActinium-225 (225Ac, t1/2 = 9.9 d) is a promising candidate radionuclide for use in targeted alpha therapy (TAT), though the currently limited global supply has hindered the development of a suitable Ac-chelating ligand and 225Ac-radiopharmaceuticals towards the clinic. We at TRIUMF have leveraged our Isotope Separation On-Line (ISOL) facility to produce 225Ac and use the resulting radioactivity to screen a number of potential 225Ac-radiopharmaceutical compounds.ResultsMBq quantities of 225Ac and parent radium-225 (225Ra, t1/2 = 14.8 d) were produced and separated using solid phase extraction DGA resin, resulting in a radiochemically pure 225Ac product in > 98% yield and in an amenable form for radiolabeling of ligands and bioconjugates. Of the many polydentate picolinic acid (“pa”) containing ligands evaluated (H4octapa [N4O4], H4CHXoctapa [N4O4], p-NO2-Bn-H4neunpa [N5O4], and H6phospa [N4O4]), all out-performed the current gold standard, DOTA for 225Ac radiolabeling ability at ambient temperature. Moreover, a melanocortin 1 receptor-targeting peptide conjugate, DOTA-modified cyclized α-melanocyte-stimulating hormone (DOTA-CycMSH), was radiolabeled with 225Ac and proof-of-principle biodistribution studies using B16F10 tumour-bearing mice were conducted. At 2 h post-injection, tumour-to-blood ratios of 20.4 ± 3.4 and 4.8 ± 2.4 were obtained for the non-blocking (molar activity [M.A.] > 200 kBq/nmol) and blocking (M.A. = 1.6 kBq/nmol) experiment, respectively.ConclusionTRIUMF’s ISOL facility is able to provide 225Ac suitable for preclinical screening of radiopharmaceutical compounds; [225Ac(octapa)]−, [225Ac(CHXoctapa)]−, and [225Ac(DOTA-CycMSH)] may be good candidates for further targeted alpha therapy studies.

Temperature and concentration control of exothermic chemical processes in continuous stirred tank reactors

Exothermic chemical reaction taking place in continuous stirred tank reactor is considered. Heat release from the chemical reaction, non-linear dynamic behavior of the process and uncertainty in parameters are the main factors motivating the use of robust control design. Viewing temperature and molar concentration as variables both accessible in real time, PI and optimal state-feedback controllers driven by temperature and concentration error signals are proposed to regulate the system over reactor’s steady-state working points by counteracting undesired disturbances. Since access to concentration value has proved beneficial for the reactor’s performance, estimation techniques are examined to compensate for the problematic nature of the concentration’s measurement. A linear reduced-order observer is first proposed to estimate the concentration value using temperature measurements. In addition, assuming concentration measurement is available with a relatively short delay via sample analysis, a linear and non-linear discrete-time predictor is constructed to estimate the concentration’s real-time value. A linear combination of the two estimation schemes (observer, predictor) is proposed resulting in a combined estimator, in which the emphasis between the two individual schemes can be controlled via a scalar parameter. The work presented in this paper was supported by the GLOW project – New weather-stable low gloss powder coatings based on bifunctional acrylic solid resins and nanoadditives – as part of the development of novel and efficient processing technologies regarding the production of new families of powder coatings, responding to industrial requirements for quality improvement at lower cost and shorter development cycles.

Epoxidation Kinetics of High-Linolenic Triglyceride Catalyzed by Solid Acidic-Ion Exchange Resin

Epoxidation of high-linolenic perilla oil was carried out in the presence of solid acidic ion-exchange resin at varying reaction temperatures for 8 h. A pseudo two-phase kinetic model that captures the differences in reactivity of double bonds at various positions in the fatty acid of a triglyceride molecule during both epoxy formation and cleavage was developed. The proposed model is based on the Langmuir-Hinshelwood-Hougen-Watson (L-H-H-W) postulates and considers the adsorption of formic acid on the catalyst as the rate-determining step. To estimate the kinetic rate constants of various reactions, genetic algorithm was used to fit experimentally obtained iodine and epoxy values of epoxidized perilla oil. A re-parametrized form of Arrhenius equation was used in the proposed model to facilitate the precise estimation of parameters with least computational effort. The obtainment of the least error between experimentally determined and theoretically predicted iodine and epoxy values indicates the robustness of the proposed model.

Kinetics and reactor modelling of fatty acid epoxidation in the presence of heterogeneous catalyst

Epoxidized fatty acids and fatty acid esters are used as chemical intermediates and environmentally friendly bio-lubricants. The epoxidation is carried out by the Prileschajew reaction, which implies the use of hydrogen peroxide as oxidation agent and a percarboxylic acid as the oxygen carrier. The epoxidation process is slow in the two-phase system (aqueous phase and oil phase), but it can be considerably enhanced by incorporating a heterogeneous acid catalyst. The results for the epoxidation of a model compound, oleic acid were presented. A cation-exchange resin (Amberlite IR-120) was used as the heterogeneous catalyst and acetic acid was the reaction carrier. Experimental data on oleic acid epoxidation were obtained at 40–50 °C under conventional heating and microwave irradiation. The experimental set was focused on studying the catalytic effect of the solid resin. The kinetic results revealed that the presence of the heterogeneous catalyst completely masked the enhancing effect of microwave radiation. An extensive set of kinetic data obtained from a laboratory-scale loop reactor was modelled with a realistic heterogeneous model taking into account the co-existence of three phases in the chemically complex reaction system. Rate equations were presented for all the reaction steps involved: the perhydrolysis, epoxidation and ring-opening steps. The rate equations were included in the three-phase reactor model and the kinetic parameters of the system were determined by non-linear regression analysis.

Temperature‐Dependent Study of Catalytic Ag Nanoparticles Entrapped Resin Nanocomposite towards Reduction of 4‐Nitrophenol

AbstractNoble metal assisted catalytic activity is a renounced adopted strategy since long times. Herein, we report an arresting of silver nanoparticles onto solid surface resin matrix in order to perform catalytic activity taking by 4‐nitrophenol as a model feed agent. The surface decoration has been evidenced by electron microscopy techniques. The superiority of this resin‐confined Ag nanoparticle based catalyst lies in their fast reduction and wide range of working temperature. The thermodynamic parameters related to activation energy, temperature dependency, and reusability can make this a suitable ‘easy to install’ all‐solid‐state fabricated catalytic membrane device.

Ra-226/Ac-225 Chemical Separation R&D at SCK⋅CEN

The radiochemistry group of SC⋅CEN possesses a purified Th-229 source since the beginning of 2017, routinely providing Ra-225, Ac-225, and Bi-213 tracers. This Th-229 had to be separated from long-lived Ac-227 and Ra-226 contaminants. The source originated from an Ac-227 production program in the 1970s, where highly radioactive Th-228 was co-produced by neutron capture of Ac-227 in the BR2 reactor when irradiating large Ra-226 targets. After 45 years in interim storage, the near-complete decay of Th-228 revealed the presence of useful quantities of Th-229, and Ra-226/Ac-227 impurities from the thorium separation process. SCK⋅CEN remained in possession of this large purified Ra-226 stock. Easy access to significant quantities of Ac-225 and Ra-225 tracers had sparked interest and research in the field of Ra/Ac separation chemistry, mainly because cost-efficient large scale production of non-carrier added Ac-225 is conceivable using the strategic Ra-226 stock as the starting material. Protons, deuterons, neutrons, and photons can be used to produce Ac-225 using Ra-226 as a target material. Especially fast neutron and photon production pathways benefit from a large Ra-226 target mass. Extraction chromatography experiments have been performed to identify a number of feasible separation and purification pathways to produce pure Ac-225 free from Ra-226 and its progeny (Pb, Bi, Po). Diglycolamide (DGA) and dialkylphosphoric acid (HDEHP) type solid phase extraction resins were tested as an approach to obtain high separation factors between Ra and Ac. Combining these two resin types was the key to efficient separation systems, as they work in the opposite acidity range. The choice of mineral acid (HNO3, HCl) influences the decontamination of Ac-225 from the progeny of Ra-226. The combination of a DGA or HDEHP resin with a U-TEVA and/or crown ether extraction resin was determined to be beneficial for removal of the progeny of Ra-226. As a pre-purification step, precipitation in strong mineral acid (HNO3, HCl) can remove the vast majority of Ra-226 from the solution. Especially when large target masses are used, this process becomes advantageous. The choice of acid can be influenced by the irradiation target compound. Ra-226 recycling throughout the process is necessary to avoid significant losses to the aqueous and solid waste. Decontamination of aqueous streams can be achieved by precipitation as RaSO4, or co-precipitation as Ba(Ra-226)SO4. RaSO4 can be converted to RaCO3, and re-dissolved in a mineral acid. These separation experiments have offered a valuable insight into the Ra/Ac separation chemistry.

Geopolymer technology for the solidification of simulated ion exchange resins with radionuclides

In this study, geopolymer was applied to convert ion exchange resins contaminated with radionuclides into a solid waste form. Geopolymer has superior properties to enable the encapsulation of spent resins. The allowable limit of resin content in the converted waste form was analyzed to evaluate the solidification capability of geopolymer. The encapsulation of ion exchange resins into solid waste form was conducted using geopolymer prepared with ground granulated blast furnace slag and alkaline solution in an ambient atmosphere, with the addition of wollastonite powder to adjust its mechanical properties. The physical and mechanical properties of the converted solid wastes prepared using different resin content ratios and various SiO2/Na2O molar ratios were tested. The results indicate the wet ion exchange resin (the moisture content in the resin is 51%) content and the compressive strength of the solid resin waste were measured as 45 wt% and 8.5 MPa, respectively. The morphology and mineral phases of the formed solid wastes were characterized using SEM and EDS. The mechanical performance test results proved the formed solid wastes could comply with the fuel cycle and material administration standards ruled by the Atomic Energy Council of Taiwan. These results suggest that this blast furnace slag-based geopolymer is a promising matrix material for the solidification of radioactive wastes.

Fabrication and evaluation of structural film adhesive using oxazolidinone modified novolac epoxy resin

ABSTRACTEpoxy film adhesives are of prime importance for the fabrication of lightweight honeycomb structures for aerospace industries. This work involves the synthesis of oxazolidinone modified epoxy novolac resin (EPN‐OXA) via the reaction of EPN and toluene diisocyanate. EPN‐OXA was characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, gel permeation chromatography, and epoxy equivalent weight. EPN‐OXA was blended with solid epoxy resin, polyethersulfone (PES) toughened liquid epoxy resin, dicyandiamide, and aluminum powder to fabricate a film adhesive curing at 170–180 °C. Effect of additives and curative on the adhesive property was studied to optimize the composition. Effect of PES on the optimized composition was studied in detail. The best composition exhibited lap shear strength of 370 ± 10 kgf cm−2 at 25 °C and the strength was retained to 75% at −196 °C and 52% at 120 °C. PES significantly enhanced the interfacial strength at different temperatures (~1.6‐fold at −196 and 25 °C and ~1.8‐fold at 120 °C). It also improved tensile strength and fracture toughness by 1.4‐ and 2‐fold, respectively. The toughening effect of PES was further confirmed by scanning electron microscopy images. PES marginally reduced the glass‐transition temperature and it exhibited no effect on thermal stability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47520.

The Effect of the Thermal Mechanical Properties of Nonconductive Films on the Thermal Cycle Reliability of 40-<inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math> </inline-formula>m Fine Pitch Cu-Pillar/Ni/SnAg Microbump Flip-Chip Assembly

Nonconductive films (NCFs) have been introduced for 3-D through-silicon via chip stacking interconnection using reliable fine pitch Cu-pillar/Ni/SnAg microbumps. In this paper, four NCF materials with various elastic modulus and coefficient of thermal expansion (CTE) values were used to investigate the effect of the thermomechanical properties of the NCFs on the thermal cycle reliability of fine pitch Cu-pillar/Ni/SnAg/Cu-pad interconnections. The NCFs’ materials properties were adjusted by changing the ratio of epoxy resins and the curing accelerators. Compared with the borate curing accelerator, the use of the imidazole curing accelerator resulted in better thermomechanical properties on NCFs. And, NCFs containing higher ratio of solid epoxy resins showed higher elastic modulus and higher Tg values when using imidazole curing accelerator. After thermocompression bonding using four different types of NCFs, a thermal cycle reliability test (−40 °C–125 °C) was performed to investigate the effects of the NCFs’ thermomechanical properties on the reliability of Cu-pillar/Ni/SnAg/Cu-pad joints. Due to the CTE mismatch of chips and printed circuit board (PCB) substrates, the SnAg solder joint interconnections were damaged during the thermal cycling. Compared with the four types of NCFs, NCFs with higher elastic modulus at 30 °C showed better thermal cycle reliability. And among the NCFs with similar CTE values, those with higher Tg and higher elastic modulus at 30 °C value showed better thermal cycle reliability. In summary, the NCFs with lower CTE and higher elastic modulus at 30 °C were suitable for highly thermal cycle reliable Cu-pillar/Ni/SnAg/Cu-pad bump joints.

Confined pyrolysis for direct conversion of solid resin spheres into yolk–shell carbon spheres for supercapacitor

Confined nanospaces with different degrees of openness realized the conversion of solid resin spheres into core–shell carbon spheres with high supercapacitor performance.

Revealing the impacts of recycled urea–formaldehyde wastes on the physical–mechanical properties of MDF

Recycling of the urea–formaldehyde (UF) products mainly obtained from adhesive wastes of wood industries is vital and requires a high level of attention due to the environmental and human health impacts of formaldehyde and other chemicals. In this study, the complete polymerized resin, as undesired waste product of Chassbsaz company, has been recycled and reused in the manufacturing process of medium density fiberboards (MDF). The results demonstrated that by adding recycled polymerized powder in sub-micron size to urea–formaldehyde control resin and replacing 1 wt% of the 55% solid content resin, the curing time of the resin significantly decreased. Fourier transform infrared spectroscopy (FTIR) demonstrated the chemical stability of the UF resins after adding 1 wt% recycled polymerized resin. In addition, there were substantial improvements in physical–mechanical properties [i.e., modulus of elasticity (MOE), modulus of rupture (MOR), internal bond (IB) strength and thickness swelling (TS)] of the newly manufactured board compared to that of the control board. Analysis of variance (ANOVA) was employed to study the dependency and significance of the physical–mechanical properties of the MDF on the concentration of the recycled polymer. Moreover, the production capacity was expected to significantly increase as the curing time decreased while maintaining the outstanding mechanical characteristics of the boards.