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拉伸倍数对ePTFE结构和性能的影响

发布时间:2019-06-06 11:28
【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,e PTFE).探讨拉伸倍数对e PTFE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,e PT泊松比逐渐减小,当拉伸倍数为10时,e PTFE的泊松比为-1.57,在非等温结晶过程中,e PTFE的结晶焓变减小,半结晶时间增大.
[Abstract]:The polytetrafluoroethylene (PTFE) can be expanded to obtain expanded polytetrafluorethylene (e-PTFE). The effect of stretching multiple on the structure and properties of e-PTFE was discussed. The results show that with the increase of the drawing multiple, the crystal of the cluster is reduced, the fiber is gradually increased, and the number of micropores is increased; with the increase of the drawing multiple, the Poisson's ratio of e PT is gradually reduced, and when the draw ratio is 10, the Poisson's ratio of e PTFE is-1.57, and in the non-isothermal crystallization process, E. The crystallization temperature of the PTFE is reduced, and the half-crystallization time is increased.
【作者单位】: 华东理工大学材料科学与工程学院;海军工程大学振动与噪声研究所;上海大学环境与化学工程学院;
【基金】:国家自然科学基金资助项目(51003209)
【分类号】:O632.21


本文编号:2494329

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