Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 66, Issue -, Pages 58-64Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.06.015
Keywords
Particle-reinforcement; Polymer-matrix composites (PMCs); Mechanical properties; Microstructures
Funding
- National Natural Science Foundation of China [11302036]
- New Century Excellent Talents in University of China [NCET-08-0075]
- Fundamental Research Funds for the Central Universities [DUT13RC(3)47]
- Postdoctoral Science Foundation of China [2014M551077]
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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.
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