期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 69, 期 2, 页码 252-259出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2008.10.013
关键词
Nanocomposites; Nanoparticles; Polymer-matrix composites(PMCs); Mechanical properties; Surface treatments
资金
- Natural Science Foundation of China [50473019]
- Natural Science Foundation of Guangdong, China [2005A10702001, 5003267]
The authors proposed all approach for manufacturing nano-SiO2/polypropylene (PP) composites by in situ reactive processing. The key issue lies in that the nanoparticles were covalently bonded to the matrix polymer via polyrethane (PU) elastomer and PP-g-NH2. Unlike the previous techniques based on graft polymerization, the present one did not need to pretreat the nanoparticles. Taking the advantages of rubber-type grafting polymer (i.e. PU) and interfacial reactive compatibilization with PP-g-NH2, a synergetic toughening effect was observed for the PP nanocomposites. Only very low concentrations of nano-SiO2 (1.5-2.5 vol.%) and PU (<4 vol.%) were sufficient to greatly increase notched impact strength of PP. Meanwhile, tensile properties of the nanocomposites were also slightly enhanced. (C) 2008 Elsevier Ltd. All rights reserved.
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