Authors: Jie Wang Weidong Wu Wencai Wang Jianchun Zhang
Publish Date: 2010/09/28
Volume: 18, Issue: 5, Pages: 1023-1032
Abstract
The effect of HP loading on the curing characteristics and mechanical properties of filled SBR and EPDM composites was investigated using bis3triethoxysilylpropyl tetrasulfide Si69 as coupling agent For all composites 20 phr part per one hundred parts of rubber silica was used The addition of HP enhances the vulcanization process of composites filled with silica The hybrid reinforcement of HP and silica imparts good stiffness and toughness to filled rubber composites An excess of HP will tend to form agglomerates in the rubber matrix which adversely affects the silicarubber matrix interfacial interaction and consequently lowers the overall mechanical properties The HP distribution and fillerrubber matrix interaction which were analyzed by scanning electron microscopy and equilibrium swelling explained well the changes in mechanical properties of composites filled with hybrid fillers Dynamic mechanical analysis indicated that the composites exhibited higher Payne effect and storage modulus and lower tanδmax value with an increase of HP loading
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