Improved mechanical properties of epoxy-based composites with hyperbranched polymer grafting glass-fiber

Li, Shuiping; Qin, Lin; Zhu, Huajun; Hou, Haijun; Li, Yanbo; Wu, Qisheng; Cui, Chong

doi:10.1002/pat.3746

Cited by 20 publications

(17 citation statements)

References 60 publications

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“…One of the several excellent properties of epoxy resin is the outstanding heat resistance, which is of great importance in practical applications of solid epoxy resin . The thermogravimetric curves of the EHTPB‐modified epoxy and neat epoxy are shown in Figure (a).…”

Section: Resultsmentioning

confidence: 99%

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

Yang

Wang

et al. 2019

J of Applied Polymer Sci

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The 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 hydroxylterminated polybutadiene (EHTPB) via one-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 kJÁmol −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.

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Section: Resultsmentioning

confidence: 99%

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

Yang

Wang

et al. 2019

J of Applied Polymer Sci

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“…The oxidized CF was refluxed in LiAlH 4 ‐THF saturated solution for 2 h to reduce carboxyl groups to hydroxyl groups (CF‐OH). The γ‐APS was dissolved in methanol and water with a volume ratio of 9: 1 to prepare a 1.5 wt% solution of the coupling agent, CF‐OH was added thereto, and the mixture was sonicated for 1 h, washed repeatedly with distilled water, dried in a vacuum oven, and marked as CF‐APS .…”

Section: Methodsmentioning

confidence: 99%

“…In a three‐necked flask, CF‐APS was added to a mixture of 0.0157 mol of succinic anhydride and 0.0143 mol of diethanolamine, and a small amount of p‐toluenesulfonic acid was added as a catalyst . The reaction was continued at 70°C for 2 h and then to 120°C for 6 h. Then the CFs were washed with DMAc and dried in a vacuum oven at 80°C for 12 h to finally obtain CF‐HBPH.…”

Section: Methodsmentioning

confidence: 99%

“…Xiao et al has incorporated a hyperbranched aromatic polyamide grown on microcrystalline cellulose fibers into epoxy resins and improved the mechanical and thermal properties of cellulose fibers/epoxy resins composite. Li et al has enhanced the mechanical properties of epoxy resin by adjunction of an amino‐terminated hyperbranched polymer grown on glass fiber. Ma and Wu et al have improved the interfacial properties of carbon fiber‐reinforced epoxy composites by grafting of branched polyethyleneimine, polyetheramine, and polyhedral oligomeric silsesquioxanes on CF surface.…”

Section: Introductionmentioning

confidence: 99%

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Grafting hyperbranched polymer with terminal hydroxyl groups onto carbon fiber surface in two‐step polycondensation for improving the interfacial properties of carbon fiber/epoxy resin composite

Wang

et al. 2018

Polymer Composites

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Hyperbranched polymer with terminal hydroxyl groups (HBPH) was grafted successfully onto carbon fiber (CFs) surface in two‐step polycondensation to improve the interfacial properties of CFs‐reinforced epoxy resin composites. The microstructure and interfacial properties of CFs before and after modification were investigated systematically. Experimental results indicated that HBPH were grafted uniformly onto CFs using γ‐aminopropyltriethoxysilane as the coupling agent. The polarity, roughness and wettability of the grafted fiber (CF‐HBPH) were enhanced distinctly in comparison with those of untreated CF. The CF‐HBPH composites displayed remarkable enhancement in interfacial shear strength, flexural strength and modulus (52.9, 29.1, and 42.6%) with no deteriorating fiber tensile strength, which was ascribed to the augment in fiber–epoxy interface through improved chemical interactions and mechanical interlocking. This was in accordance with scanning electron microscopy observations from the fracture surface morphologies of the composites. POLYM. COMPOS., 40:E1378–E1387, 2019. © 2018 Society of Plastics Engineers

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“…[36][37][38] Succinic anhydride (1.57 g) was blended with diethanolamine (1.50 g) at 70°C for 6 h in a 50-mL round-bottomed flask provided with a thermometer, nitrogen inlet, and magnetic stirring. The mixture was heated to 120°C and kept for 6 h with stirring in nitrogen.…”

Section: B Hbph Synthesismentioning

confidence: 99%

The effect of core–shell particles on the mechanical performance of epoxy resins modified with hyperbranched polymers

Lin

Cui

2016

J. Mater. Res.

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A novel core-shell particle that consists of epoxide-terminated hyperbranched polymer (HBP) and silica nanoparticles was incorporated into an epoxy/hydroxyl-terminated HBP blend to fabricate a high-performance epoxy thermoset. The effect of the core-shell particle content on the mechanical properties of the epoxy thermosets was investigated in detail. Results from tensile, flexural, and impact tests are provided. The impact fracture surface was studied by field emission-scanning electron microscopy. The incorporation of 2 wt% core-shell particles improved the tensile strength, percent elongation at break, flexural strength, and impact resistance of epoxy/hydroxyl-terminated HBP thermosets. Field emission-scanning electron micrographs showed that core-shell particle addition resulted in large-scale shear deformation and debonding from the epoxy matrix, and improved the epoxy resin toughness.

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Improved mechanical properties of epoxy-based composites with hyperbranched polymer grafting glass-fiber

Cited by 20 publications

References 60 publications

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

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

Grafting hyperbranched polymer with terminal hydroxyl groups onto carbon fiber surface in two‐step polycondensation for improving the interfacial properties of carbon fiber/epoxy resin composite

The effect of core–shell particles on the mechanical performance of epoxy resins modified with hyperbranched polymers

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