Improvement of creep resistance of polytetrafluoroethylene films by nano-inclusions

Xue Bo Shi, Chun Lei Wu, Min Zhi Rong, Tibor Czigany, Wen Hong Ruan, Ming Qiu Zhang

Research output: Article

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)377-387
Number of pages11
JournalChinese Journal of Polymer Science (English Edition)
Volume31
Issue number3
DOIs
Publication statusPublished - jan. 1 2013

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics

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