应用化学 ›› 1993, Vol. 0 ›› Issue (2): 115-116.

• 研究简报 • 上一篇    下一篇

聚偏氟乙烯取向膜在拉伸过程中的晶相变化

赵勇, 陈晔, 杨德才   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1991-11-23 修回日期:1992-11-09 出版日期:1993-04-10 发布日期:1993-04-10
  • 基金资助:
    国家自然科学基金资助课题

PHASE TRANSITION OF ORIENTED POLY(VINYLIDENE FLUORIDE)FILMS UPON STRETCHING

Zhao Yong, Chen Ye, Yang Decai   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1991-11-23 Revised:1992-11-09 Published:1993-04-10 Online:1993-04-10

摘要: 聚偏氟乙烯(PVF2)的多晶型、压电和热电性引起人们关注。一般认为PVF2有α、β、γ、δ 4种晶相,另有报道存在一ε相。其中具有压电和热电性的β相最为重要。通常从PVF2熔体只能获得α相。为了获得β相结晶,人们尝试过很多方法。本文研究拉伸过程中PVF2结构和晶相的变化。PVF2为Polysciences产品,MW 1.4×105。经熔体拉伸制成厚50nm的取向膜。仪器为H-600型透射电镜,工作电压100kV。以及Alpha Cenfauri付利叶变换红外光谱仪。

关键词: 聚偏氟乙烯, 形态结构, 晶相

Abstract: Deformation process and phase transition of the oriented films of poly(vinylidene fluoride) (PVF2) have been investigated by electron microscopy,electron diffraction and FTIR. The films prepared by a melt drawn technique contain highly oriented larnellae, which predominantly consist of a phase. During the course of stretching the fibrillar crystals are formed,accompanied by a α→β phase transition. Increasing deformation temperature is of no advantage to the α→β phase transition.

Key words: poly(vinylidene fluoride), morphology, crystal phase