Soluble Polyimide-reinforced TGDDM and DGEBA Epoxy Composites  

作　　者：Qi Chen Shun Wang Feng Qin Kuan Liu Qian Liu Qing Zhao Xing-Yi Wang Yan-Hong Hu 

机构地区：[1]Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Journal of Polymer Science》2020年第8期867-876,I0007,共11页高分子科学（英文版）

基　　金：This work was financially supported by the National Key Research and Development Program of China(No.2016YFC0204300);the National Natural Science Foundation of China(Nos.21777043,21976056).

摘　　要：Polyimide(PI)synthesized from aromatic diamine and dianhydrides via two-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/m2,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,Tg and thermal stability of M-PI and E-PI were increased effectively.

关 键 词：POLYIMIDE TGDDM and DGEBA epoxy resin Impact strength TOUGHNESS 

分 类 号：TB332[一般工业技术—材料科学与工程]