One-step process to make electrically conductive thermoplastic vulcanizates filled with MWCNTs |
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Authors: | Hao-sheng Wang Xiao-hong Zhang Yi-lei Zhu Zhi-hai Song Jin-liang Qiao |
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Institution: | College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, China |
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Abstract: | Electrically conductive thermoplastic vulcanizates (TPVs) filled by multi-walled carbon nanotubes (MWCNTs) are prepared by a simple one-step melt mixing process, based on linear low density polyethylene (LLDPE) and ultrafine full-vulcanized rubber particles (UFRP). An ideal morphology with controlled localization of MWCNTs in continuous LLDPE matrix and appropriate size of finely-dispersed UFRP can be achieved at the same time. The controlled localization of MWCNTs in the continuous phase facilitates the formation of conductive pathway, and thus the volume resistivity of the as-prepared LLDPE/UFRP/MWCNTs thermoplastic vulcanizates is significantly decreased. The results show that both the blend ratio of LLDPE/UFRP and the loading of MWCNTs have remarkable effect on the volume resistivity. Significantly, the electrically conductive TPVs exhibit good mechanical properties duo to the fine dispersion of UFRP in LLDPE. The added MWCNTs are capable of imparting reinforcement effects to thermoplastic vulcanizates with just a slight loss of stretchability and elasticity. |
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Keywords: | Thermoplastic vulcanizates Multi-walled carbon nanotubes Ultrafine full-vulcanized rubber particles Volume resistivity Mechanical properties |
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