Curing process optimization and mechanical properties improvement of epoxy resin copolymer modified by epoxy-terminated hyperbranched polyether sulfone

Zhu, Tianyu; Lü, Chunxiang; Lu, Xiaoxuan; Zhi, Jieying; Song, Yingjun

doi:10.1016/j.polymer.2022.124535

Cited by 15 publications

(16 citation statements)

References 40 publications

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“…However, at higher loadings of HBPs, the mechanical performance decreased due to incomplete cure. Similar results were obtained in the study by Zhu et al [ 137 ], in which they also rationalize the results in terms of more flexible crosslinks.…”

Section: Thermomechanical Characteristicssupporting

confidence: 91%

Enhancement of Epoxy Thermosets with Hyperbranched and Multiarm Star Polymers: A Review

Santiago

Serra

2022

Polymers

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Hyperbranched polymers and multiarm star polymers are a type of dendritic polymers which have attracted substantial interest during the last 30 years because of their unique properties. They can be used to modify epoxy thermosets to increase their toughness and flexibility but without adversely affecting other properties such as reactivity or thermal properties. In addition, the final properties of materials can be tailored by modifying the structure, molecular weight, or type of functional end-groups of the hyperbranched and multiarm star polymers. In this review, we focus on the modification of epoxy-based thermosets with hyperbranched and multiarm star polymers in terms of the effect on the curing process of epoxy formulations, thermal, mechanical, and rheological properties, and their advantages in fire retardancy on the final thermosets.

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Section: Thermomechanical Characteristicssupporting

confidence: 91%

Enhancement of Epoxy Thermosets with Hyperbranched and Multiarm Star Polymers: A Review

Santiago

Serra

2022

Polymers

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“…The enhanced tensile properties are attributed to the improved matrix and interfacial properties. The matrix properties have been described in our previous study 19 . When the content of EHPES is lower than 7%, the enhanced capacity of DGEBA/EHPES matrix to absorb fracture energy, the limited relative slip and mobility of molecular chains, the effect of “flexible” crosslinking points, and the increased rigidity increase the strength and modulus of matrix macroscopically.…”

Section: Resultsmentioning

confidence: 91%

“…The synthesis process of EHPES has been reported in our previous study. 19 The diglycidyl ether of bisphenol-A (DGEBA) was supplied by Nantong Xingchen Synthetic Material Co., Ltd. (epoxy equivalent weight, EEW = 184-200 g/equiv.). Diethyltoluenediamine (DETDA) and 4,4 0diaminodiphenyl methane (DDM), used as curing agents, were supplied by Shanghai Aladdin Bio-Chem Technology Co., Ltd. and Shanghai SSS Reagent Co., Ltd., respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The mechanical interlocking and chemical bonding of the interfacial layer are enhanced by introducing HBPs, thus enhancing its ability to transfer external stress. The epoxy‐terminated hyperbranched polyether sulfone (EHPES) has been successfully synthesized by a facile one‐step method and demonstrated to be an effective modifier for DGEBA in our previous study 19 . The terminal epoxy groups provide good compatibility, polyether sulfone provides excellent stability and heat resistance.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial and tensile properties improvement of composites using a modified matrix with epoxy‐terminated hyperbranched polyether sulfone

Zhu

Lü

et al. 2022

J of Applied Polymer Sci

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The carbon fiber/epoxy resin (CF/EP) composites have been prepared using CF and the diglycidyl ether of bisphenol‐A (DGEBA) matrix, modified by a new epoxy‐terminated hyperbranched polyether sulfone (EHPES). Compared with CF/DGEBA composite, the modified CF/EHPES composites achieve excellent performances. The tensile strength, modulus, and elongation at break are increased by 19.1%, 7.9%, and 66.7%, respectively. The results are mainly caused by the strong interfacial properties, the interfacial shear strength (IFSS) of CF/7% EHPES composite is increased by 20.7%. Many crosslinking points enhance the mechanical interlocking between the DGEBA/EHPES matrix and CF surface. The strengthened chemical bonding promotes the formation of a higher density crosslinking network. This study provides a strategy for the domestication of large diameter wind turbine blades.

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“…On the other hand, physical modification of EP is the most used method. The main types of modifiers are inorganic nanoparticles, rubber particles and thermoplastics [48][49][50].…”

Section: Epoxy Resins (Ers)mentioning

confidence: 99%

Modified Thermosets – A Review

et al. 2022

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Recent and extensive reports on the development of preparation methods that can lead to obtaining various nanostructured polymeric materials, including the preparation of nanoparticles, nano-capsules, nano-gels, nano-fibres, dendrimers and nano-composites, have been presented in the literature to provide a picture of the complexity of the field, and the diversity of approaching methods. From the data presented by various researchers, it appears that by ensuring a rigorous control of the nano-structuration of polymers and/or by adding nano-particles to the polymer matrices, improvements in structural and functional properties can be achieved in a significant number of polymer systems as a response to the continuous demands of industrial advanced sectors. Until now, most of the studies on polymer blends have been related to the control of their physical and chemical properties, their barrier properties or their electrical conductivity. This paper briefly presents various applications of resins (thermoset polymers) used to synthesize some polymer materials and blends.

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Curing process optimization and mechanical properties improvement of epoxy resin copolymer modified by epoxy-terminated hyperbranched polyether sulfone

Cited by 15 publications

References 40 publications

Enhancement of Epoxy Thermosets with Hyperbranched and Multiarm Star Polymers: A Review

Enhancement of Epoxy Thermosets with Hyperbranched and Multiarm Star Polymers: A Review

Interfacial and tensile properties improvement of composites using a modified matrix with epoxy‐terminated hyperbranched polyether sulfone

Modified Thermosets – A Review

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