拉伸倍数对ePTFE结构和性能的影响

doi:10.12066/j.issn.1007-2861.1802

上海大学学报(自然科学版) ›› 2017, Vol. 23 ›› Issue (6): 851-.doi: 10.12066/j.issn.1007-2861.1802

拉伸倍数对ePTFE结构和性能的影响

涂永辉¹, 余若冰¹, 杨雪², 焦正³

1. 华东理工大学材料科学与工程学院, 上海, 200237;
2. 海军工程大学振动与噪声研究所, 武汉 430033;
3. 上海大学环境与化学工程学院, 上海 200444

收稿日期:2016-03-25 出版日期:2017-12-30 发布日期:2017-12-30
通讯作者: 余若冰(1975—), 女, 副教授, 博士, 研究方向为高分子材料及复合材料. E-mail: rbyu@ecust.edu.cn
作者简介:余若冰(1975—), 女, 副教授, 博士, 研究方向为高分子材料及复合材料. E-mail: rbyu@ecust.edu.cn
基金资助:
国家自然科学基金资助项目(51003209)

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

TU Yonghui¹, YU Ruobing¹, YANG Xue², JIAO Zheng³

1. School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China;
3. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received:2016-03-25 Online:2017-12-30 Published:2017-12-30

摘要/Abstract

摘要：

对聚四氟乙烯(polytetrafluoroethylene, PTFE)进行拉伸, 可以得到膨体聚四氟乙烯(expanded polytetrafluoroethylene, ePTFE). 探讨拉伸倍数对ePTFE结构和性能的影响. 结果表明: 随着拉伸倍数的增大, 簇状的晶体减少, 纤维逐渐增多, 微孔增多; 随着拉伸倍数的增大, ePT泊松比逐渐减小, 当拉伸倍数为10时, ePTFE的泊松比为−1.57, 在非等温结晶过程中, ePTFE的结晶焓变减小, 半结晶时间增大.

关键词: ePTFE), 泊松比, 拉伸, 膨体聚四氟乙烯(expanded polytetrafluoroethylene

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)

涂永辉1, 余若冰1, 杨雪2, 焦正3. 拉伸倍数对ePTFE结构和性能的影响[J]. 上海大学学报(自然科学版), 2017, 23(6): 851-.

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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拉伸倍数对ePTFE结构和性能的影响

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

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