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Improvement of creep resistance of polytetrafluoroethylene films by nano-inclusions

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Abstract

To improve creep resistance of directional polytetrafluoroethylene (PTFE) films, epoxy grafted nano-SiO2 is mixed with PTFE powder before sintering and calender rolling. The aligned macromolecular chains (especially those in amorphous region) of the composite films can be bundled up by the nanoparticles to share the applied stress together. In addition, incorporation of silica nanoparticles increases crystallinity of PTFE and favors microfibrillation of PTFE in the course of large deformation. As result, PTFE films exhibit lower creep strain and creep rate, and higher tensile strength and hardness. The work is believed to open an avenue for manufacturing high performance fluoropolymers by nano-inclusions.

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Authors and Affiliations

  1. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, DSAPM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, 510275, China

    Xue-bo Shi, Min-zhi Rong, Wen-hong Ruan  (阮文红) & Ming-qiu Zhang

  2. Donghong Rubber & Plastics Products Company Ltd., Guangzhou, 510530, China

    Chun-lei Wu

  3. Department of Polymer Engineering, Budapest University of Technology and Economics, H-1111, Budapest, Hungary

    Tibor Czigany

Authors
  1. Xue-bo Shi
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  2. Chun-lei Wu
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  3. Min-zhi Rong
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  4. Tibor Czigany
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  5. Wen-hong Ruan  (阮文红)
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  6. Ming-qiu Zhang
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Corresponding author

Correspondence to Wen-hong Ruan  (阮文红).

Additional information

The work was financially supported by the National Natural Science Foundation of China (No. 51173207), Sino-Hungarian Scientific and Technological Cooperation Project (No. 2009DFA52660), Key projects of Guangdong Education Office (No. cxzd1101), and Natural Science Foundation of Guangdong (Nos. 2010B010800020, 2011B090500004, 2011BZ100051).

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Shi, Xb., Wu, Cl., Rong, Mz. et al. Improvement of creep resistance of polytetrafluoroethylene films by nano-inclusions. Chin J Polym Sci 31, 377–387 (2013). https://doi.org/10.1007/s10118-013-1225-8

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  • DOI: https://doi.org/10.1007/s10118-013-1225-8

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