期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 54, 期 -, 页码 20-27出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.06.016
关键词
Polymer-matrix composites (PMCs); Particle-reinforcement; Mechanical properties; Stress transfer
资金
- Ministry of Science and Technology of China [2011DFR50200, 2012CB937503]
- National Nature Science Foundation of China [11225210, 51073044]
- Research Project of State Grid of China [DG17201200051]
Tensile properties of fumed silica filled hydroxylated polydimethylsiloxane (PDMS) networks were investigated in the current work. Similar to unfilled bimodal networks, unimodal networks filled with concentrated fumed silica exhibit non-Gaussian effect and improved ultimate tensile properties. The concept of hierarchical network was proposed to depict the networks exhibiting non-Gaussian effect at sufficiently high strains. It was found that the reinforcing effect originates from both the effective volume effect from filler volume and polymer-filler interaction and the synergistic effect between network chains within the hierarchical network. Experimental results showed that filler's dispersion, concentration, specific surface area and surface chemistry have a great influence on the tensile properties, which could be interpreted by analyzing the variation of both effective volume effect and synergistic effect. (C) 2013 Elsevier Ltd. All rights reserved.
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