文献类型：期刊文献

英文题名：Novel Reactive Polyhedral Oligomeric Silsesquioxane-Reinforced and Toughened Epoxy Resins for Advanced Composites

作者：Liu, Weibo[1];Wang, Caiyun[1];Feng, Yu[1];Chen, Yongfeng[1];Wan, Liqiang[1];Huang, Farong[1];Liu, Zuozhen[2];Qian, Jianhua[2];Liu, Weiping[3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, HuaChang Polymers Co Ltd, Shanghai 200241, Peoples R China;[3]Shanghai Aircraft Mfg Co Ltd, Mfg Ctr Composite Mat Commercial Aircraft, COMAC, Shanghai 201324, Peoples R China

年份：2024

卷号：16

期号：13

外文期刊名：POLYMERS

收录：;EI(收录号：20242916703240);WOS:【SCI-EXPANDED(收录号:WOS:001270448700001)】；

基金：This research was funded by the National Key R&D Program of China (No. 2022YFB3709201) and the Fundamental Research Funds for the Central Universities (No. JKD01241701).

语种：英文

外文关键词：high-performance epoxy resin; polyhedral oligomeric silsesquioxane; toughness; liquid molding resin for advanced composites

摘要：Most toughening methods for epoxy resins are usually used at the expense of other properties. Some polyhedral oligomeric silsesquioxanes (POSSs) with both a rigid Si-O-Si structure and flexible organic chain segments could be expected to be effective toughening agents. In this study, three reactive polyhedral oligomeric silsesquioxanes with a thiol group (OMPPS), a carboxyl group (OCOPS), and an epoxy group (OGCPS) were synthesized and characterized. They were utilized as modifiers to toughen 3-(oxiran-2-ylmethoxy)-N,N-bis(oxiran-2-ylmethyl)aniline (AFG-90MH)/4,4 '-methylenebis(2-ethylaniline) (MOEA) (epoxy resin) with different molar ratios to obtain hybrid resins named OMPPS-EP-i, OCOPS-EP-j, and OGCPS-EP-k. The effects of the amount of modifier added and the length of the organic chain on the cage structure on various properties of the hybrid resins were investigated. The results show that all three modifiers show good compatibility with the epoxy resin. The hybrid resins have a low viscosity at 45 similar to 85 degrees C and can be cured at a low temperature (110 degrees C). The cured hybrid resins display improved toughness. Typically, the critical stress intensity factor (K-IC) and impact strength of OGCPS-EP-0.6-C are 2.54 MPa.m(-1/2) and 19.33 kJ.m(-2), respectively, which increased by 58.75% and 22.48% compared with the pristine epoxy resin, respectively. In addition, the glass transition temperature and flexural strength of the hybrid resins are basically unchanged.