聚乙烯甲基弯曲振动二维红外光谱研究  

Two-dimensional infrared spectroscopy study of polyethylene methyl bending vibration mode

作　　者：肖霄[1] 吴镝[2] 马小茗[1] 刘国凯[1] 张世林[1] 门晓鹏[1] 于宏伟[1] 

机构地区：[1]石家庄学院化工学院,河北石家庄050035 [2]怀化学院生命科学系,湖南怀化41800

出　　处：《实验技术与管理》2015年第6期37-41,共5页Experimental Technology and Management

基　　金：河北省科技厅科学技术研究与发展计划项目(10215687)

摘　　要：在293K^393K范围内,分别测定聚乙烯甲基弯曲振动模式(δCH 3)的一维红外光谱、二阶导数红外光谱、四阶导数红外光谱和去卷积红外光谱。实验发现:1 455cm-1和1 377cm-1附近的红外吸收峰,分别归属于聚乙烯甲基不对称弯曲振动模式(δas CH 3)和甲基对称弯曲振动模式(δs CH 3)。进一步采用二维红外光谱研究了聚乙烯δCH 3,研究发现:随着测定温度的升高,聚乙烯分子中δCH 3红外吸收强度变化早晚顺序为:1 455cm-1(δas CH 3)早于1 377cm-1(δsCH 3)。此项研究显示出二维红外光谱在高分子材料热变性分析中的重大作用。In the temperature range from 293 K to 393 K, the polyethylene methyl bending vibration mode （＆＇.3） has been studied by one-dimensional infrared spectrum, second derivative infrared spectrum, fourth derivative infrared spectrum and deconvolution infrared spectrum. The polyethylene asymmetrical methyl bending vibration mode （vasCH3） and symmetrical methyl bending vibration mode （vsCH3） occur respectively near 1 455 cm-1 and 1 377 cm^-1. The polyethylene δCH 3 is researched by two-dimensional infrared spectrum. Two- dimensional infrared spectrum of polyethylene is studied to determine the sequence of intensity changes. It is found that the sequence of intensity changes is 1 455 cm^-1 （δasCH3）〉1 377 cm^-1 （δSCH 3）. This study demonstrates the key roles of two-dimensional infrared spectrum in the analysis of thermal denaturation of the polymer materials.

关 键 词：聚乙烯 一维红外光谱 二阶导数红外光谱 四阶导数红外光谱 去卷积红外光谱 二维红外光谱 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]