室温下聚四氟乙烯的压致相变  

Pressure Induced Phase Transitions of PTFE at Room Temperature

作　　者：王晋[1] 杨梅林[1] 沈家骢[1] 赵永年[1] 崔启良[1] 邹广田[1] 

机构地区：[1]吉林大学,长春130023

出　　处：《高等学校化学学报》1992年第7期994-997,共4页Chemical Journal of Chinese Universities

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.The pressure induced phase transitions of PTFE at room temperature was investigated by employing Laser Raman spectra. The Raman spectra of PTFE showed 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.

关 键 词：压致相变 拉曼光谱 聚四氟乙烯 

分 类 号：O632.21[理学—高分子化学]