拉伸倍数对ePTFE结构和性能的影响

doi:10.12066/j.issn.1007-2861.1802

Abstract

Abstract:

Expanded polytetrafluoroethylene (ePTFE) can be obtained from polytetrafluoroethylene(PTFE) by drawing. Effect of the drawing ratio on the structure and properties of ePTFE was investigated. The following results were obtained. 1) With the increase of drawing ratio, the amount of tuft-like crystals was small, fibers increased and cavities rose in ePTFE. 2) When the drawing ratio was 10, the Poisson’s ratio was −1.57. As the drawing ratio increased, the Poisson’s ratio gradually depressed. 3) In anon-thermal crystallization process, as increasing drawing ratio, enthalpy of ePTFE decreased and semi-crystallization time became longer.

Key words: drawing, Poisson’s ratio, expanded polytetrafluoroethylene (ePTFE)

TU Yonghui1, YU Ruobing1, YANG Xue2, JIAO Zheng3. Effect of drawing ratio on structure and property of expanded polytetrafluoroethylene (ePTFE)[J]. Journal of Shanghai University（Natural Science Edition）, 2017, 23(6): 851-.

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Effect of drawing ratio on structure and property of expanded polytetrafluoroethylene (ePTFE)

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