文献类型：期刊文献

英文题名：The application of highly soluble amine-terminated aromatic polyimides with pendent tert-butyl groups as a tougher for epoxy resin

作者：Zhao, Qing[1];Wang, Xing-yi[1];Hu, Yan-hong[2]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Key Lab Specially Funct Polymers & Related Techno, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：33

期号：10

起止页码：1359

外文期刊名：CHINESE JOURNAL OF POLYMER SCIENCE

收录：;EI(收录号：20212810632170);WOS:【SCI-EXPANDED(收录号:WOS:000359819700002)】；

基金：This work was financially supported by the Shanghai key R&D Program (No. DZ1100105).

语种：英文

外文关键词：Polyimide; Epoxy resin; Solubility; Impact strength

摘要：Polyimides (PIs) with various molecular weights synthesized via the reaction of aromatic diamine monomer containing tert-butyl groups with aromatic dianhydride were highly soluble in common organic solvents and some epoxy resins at room temperature. These PIs can be incorporated in the absence of organic solvent into epoxy resin E51 with the loading below 2 wt% forming EP-PI composites. No phase separation is observed by SEM on cryogenically fractured surfaces of EP-PI composites. The PI can improve mechanical properties, especially impact strength. Adding 2 wt% PI-1.5W, the impact strength reaches to 55 kJ/m(2) with the increase in tensile and flexural strengths by 14% and 3%, respectively. SEM analyses for the fracture surface suggest that PI reduces the crosslink density, improves the plasticity of epoxy resin and changes the mode of fracture from fragile to ductile. Moreover, the glass transition temperature of EP-PI composites was found to increase to a significant extent.