Toughening modification of epoxy resins by epoxy-terminated hyperbranched polyethers fabricated by doping sorbitol with inositol,Journal of Applied Polymer Science

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Toughening modification of epoxy resins by epoxy-terminated hyperbranched polyethers fabricated by doping sorbitol with inositol
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-08-14 , DOI: 10.1002/app.54551
Siyuan Lu _{1,

2} , Gang Wu _{1,

2} , Fangfang Niu _{1,

2} , Yangdong Liu _{1,

2} , Xingsheng Liu _{1,

2} , Wan Xu _{1,

2} , Zhenbin Chen _{1,

2}

Affiliation

Increasing social awareness concerning the design of excellent performance toughening agents to curb the adverse effects of insufficient toughness on the wide range of applications of epoxy resin (EP). Herein, a small amount of sorbitol was doped into carbocyclic inositol as a core monomer, and bisphenol-A and epichlorohydrin were used to produce epoxide-terminated hyperbranched polyether by one-pot preparation method. After that, the prepared polymer was used as modifier to improve the toughness and strength of petroleum-based EPs. Results demonstrated that after adding the homemade epoxy-terminated hyperbranched polyether (EHBPE) to the EP, the polyether prepared with the ratio of sorbitol and inositol displayed significant advantages compared with the polyether with monomers using only sorbitol and inositol, respectively. In particular, the impact, and tensile strengths of EHBPE-IS/EP cured sample with EHBPE-IS loading at 20% were increased by 197.5%, 139.6%, respectively, compared with those of neat EP. In brief, EHBPE-IS, a member of the family of EHBPEs, provided a facile method for the preparation of bifunctional modifier for tough and strong EP with promising industrial applications.

中文翻译：

肌醇掺杂山梨醇端环氧基超支化聚醚对环氧树脂的增韧改性

提高社会对设计性能优异的增韧剂的认识，以遏制韧性不足对环氧树脂（EP）广泛应用的不利影响。本文以碳环肌醇为核心单体，掺杂少量山梨醇，采用双酚A和环氧氯丙烷，通过一锅法制备环氧基封端超支化聚醚。之后，将制备的聚合物用作改性剂来提高石油基EP的韧性和强度。结果表明，在EP中添加自制的端环氧基超支化聚醚(EHBPE)后，山梨醇和肌醇比例制备的聚醚与分别仅使用山梨醇和肌醇单体的聚醚相比表现出明显的优势。尤其，EHBPE-IS负载量为20%时，EHBPE-IS/EP固化样品的冲击强度和拉伸强度比纯EP分别提高了197.5%和139.6%。简而言之，EHBPE-IS作为EHBPE家族的一员，为制备强韧EP双功能改性剂提供了一种简便的方法，具有广阔的工业应用前景。

更新日期：2023-08-14

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