聚四氟乙烯的变温红外光谱研究  

Research on Polytetrafluoroethylene(PTFE) by Variable Temperature FTIR Technique

作　　者：于宏伟[1] 顾丹丹[1] 陈宁[1] 马钟义 王壮[1] 侯玺康 吴玉静[1] 李丹[1] 

机构地区：[1]石家庄学院化工学院,石家庄050035

出　　处：《精细石油化工进展》2014年第6期45-47,共3页Advances in Fine Petrochemicals

基　　金：石家庄市科学技术研究与发展计划课题(131500142A)

摘　　要：在30-120℃温度范围内,采用变温红外技术,分别测定了聚四氟乙烯的一维红外光谱及二阶导数红外光谱,并进一步研究了温度对其分子结构的影响。研究发现,在1 400-400 cm^-1的频率范围内,聚四氟乙烯主要存在着F—C—F伸缩振动模式（νCF2）和F—C—F弯曲振动模式（δCF2）。聚四氟乙烯F—C—F弯曲振动模式（640 cm^-1）的红外吸收峰对温度变化敏感。本项研究拓展了红外光谱在聚四氟乙烯材料热变性方面的研究范围。The one-dimensional infrared spectra and second derivative infrared spectra of PTFE in 30 ℃to 120 ℃ were determined with variable temperature FTIR technique respectively,and the effect of temperature on the molecular structure of PTFE was studied.According to the results of study,the vibration modes of PTFE are F—C—F stretching vibration mode（νCF2） and F—C—F flexural vibration mode（δCF2） in the frequency range of 1 400 cm^-1 to 400 cm^-1 for the most part.The infrared absorption peak in F—C—F flexural vibration mode（640 cm^-1） of PTFE is sensitive to the change of temperature.This study has expanded the range of study regarding the thermal denaturation of PTFE material.

关 键 词：一维红外光谱 二阶导数红外光谱 聚四氟乙烯 热变性 

分 类 号：O657.33[理学—分析化学] TQ325.4[理学—化学]