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Preparation and characterization of hemp hurd powder filled SBR and EPDM elastomers

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Abstract

The effect of HP loading on the curing characteristics and mechanical properties of filled SBR and EPDM composites was investigated using bis-(3-triethoxysilylpropyl) 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 silica-rubber matrix interfacial interaction, and consequently lowers the overall mechanical properties. The HP distribution and filler-rubber 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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Authors and Affiliations

  1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China

    Jie Wang, Weidong Wu, Wencai Wang & Jianchun Zhang

  2. The Research Center of China-Hemp Materials, the Quartermaster Research Institute of General Department of the PLA, Beijing, 100082, China

    Jianchun Zhang

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  1. Jie Wang
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  2. Weidong Wu
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  3. Wencai Wang
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Correspondence to Jianchun Zhang.

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Wang, J., Wu, W., Wang, W. et al. Preparation and characterization of hemp hurd powder filled SBR and EPDM elastomers. J Polym Res 18, 1023–1032 (2011). https://doi.org/10.1007/s10965-010-9503-4

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  • DOI: https://doi.org/10.1007/s10965-010-9503-4

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