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论文类型：期刊论文

发表时间：2014-11-01

发表刊物：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录刊物：SCIE、EI

卷号：66

页面范围：58-64

ISSN号：1359-835X

关键字：Particle-reinforcement; Polymer-matrix composites (PMCs); Mechanical properties; Microstructures

摘要：Polystyrene (PS) spheres were chosen as soft fillers to toughen epoxy polymer. In order to weaken the aggregation of PS spheres in epoxy matrix caused by phase separation, amination treatment were firstly done on them. The results of FTIR, zeta potential test and TGA indicate that amine groups have been successfully grafted to the surface of PS spheres. SEM observation suggests that aminated PS spheres are monodisperse in prepared epoxy blends. The tensile strength and fracture toughness of the 15 wt% aminated PS spheres/epoxy polymer blends are 74.5 MPa and 2.23 MPa m(1/2). Compared with cured pure epoxy polymer, they are increased by 25.6% and 84.3%, respectively. Excellent dispersion properties in epoxy matrix and increased interfacial force with epoxy matrix are responsible for the huge effect of the aminated PS spheres on toughening epoxy polymer. (C) 2014 Elsevier Ltd. All rights reserved.