文献类型：期刊文献

英文题名：Soluble Polyimide-reinforced TGDDM and DGEBA Epoxy Composites

作者：Chen, Qi[1];Wang, Shun[1];Qin, Feng[1];Liu, Kuan[1];Liu, Qian[1];Zhao, Qing[1];Wang, Xing-Yi[1];Hu, Yan-Hong[2]

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

年份：2020

卷号：38

期号：8

起止页码：867

外文期刊名：CHINESE JOURNAL OF POLYMER SCIENCE

收录：;EI(收录号：20212810632746);WOS:【SCI-EXPANDED(收录号:WOS:000544348000010)】；

语种：英文

外文关键词：Polyimide; TGDDM and DGEBA epoxy resin; Impact strength; Toughness

摘要：Polyimide (PI) synthesized from aromatic diamine and dianhydridesviatwo-step poly-condensation method was highly soluble in TGDDM (MY-720) and DGEBA (E-51) at desirable temperature. TGDDM-PI (M-PI) and DGEBA-PI (E-PI) composites within 0.5%-3% PI loading could be prepared without organic solvent. On the cryogenically fractured surfaces of M-PI and E-PI composites, no obvious heterogeneous phase was observed by SEM. The mechanical properties were promoted significantly by PI, especially for impact strength. Adding 2% PI-2W into MY-720 and E-51 composites, the impact strength increased to 21 and 51 kJ/m(2), the tensile strength increased by 62% and 19%, and the flexural strength by 18% and 13%, respectively, with slight increases in tensile modulus. These results were related to the promotion in plasticity of composites and changes in fragile -> ductile fracture mode. Moreover,T(g)and thermal stability of M-PI and E-PI were increased effectively.