Pressure Induced Phase Transitions of PTFE at Room Temperature

Abstract

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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WANG Jin, YANG Mei-lin, SHEN Jia-cong, ZHAO Yong-nian, CUI Qi-liang, ZOU Guang-tian. Pressure Induced Phase Transitions of PTFE at Room Temperature[J]. Chem. J. Chinese Universities, 1992, 13(7): 994.

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Pressure Induced Phase Transitions of PTFE at Room Temperature

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