高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (7): 994.

• 论文 • 上一篇    下一篇

室温下聚四氟乙烯的压致相变

王晋, 杨梅林, 沈家骢, 赵永年, 崔启良, 邹广田   

  1. 吉林大学, 长春, 130023
  • 收稿日期:1991-09-05 出版日期:1992-07-24 发布日期:1992-07-24
  • 通讯作者: 王晋

Pressure Induced Phase Transitions of PTFE at Room Temperature

WANG Jin, YANG Mei-lin, SHEN Jia-cong, ZHAO Yong-nian, CUI Qi-liang, ZOU Guang-tian   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1991-09-05 Online:1992-07-24 Published:1992-07-24

摘要: 用激光拉曼光谱研究了PTFE在室温下的压致相变,压致Ⅳ-Ⅱ和Ⅱ-Ⅲ相变时,相应的拉曼光谱都有明显的变化,讨论了压致相变时的构象变化.用Tait方程和Murnaghan方程处理等温压缩数据,也发现了Ⅱ-Ⅲ压致相变.首次计算了高压相的模Gruneisen参数.

关键词: 压致相变, 拉曼光谱, 模Gruneisen参数, Tait方程, Murnaghan方程

Abstract: The pressure induced phase transitions of PTFEat room temperature was investigated by employing Laser Raman spectra.The Raman spectra of PTFEshowed distinct changes when Ⅳ- Ⅱ phase transition and Ⅱ - Ⅲ phase transition occur on the effect of pressure.The corresponding confofmational changes were also discussed.Ⅱ -Ⅲ Transition is verified by analysis the compression data with Tait equation and Murnaghan equation.The mode Gruneisen parameters of high pressure phase Ⅲ are first calculated.

Key words: Pressure induced phase transition, Raman spectra, Mode Gruneisen parameter, Tait equation, Murnaghan equation

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