聚苯乙烯分子结构及热变性研究  

Study on Molecular Structure and Thermal Denaturation of Polystyrene

作　　者：于宏伟[1,2] 田晨阳 刘荣 YU Hongwei;TIAN Chenyang;LIU Rong(College of Chemical Technology,Shijiazhuang University,Shijiazhuang,Hebei 050035,China;Hebei Provincial Anesthetic Technology Innovation Center,Shijiazhuang,Hebei 050035,China)

机构地区：[1]石家庄学院化工学院,河北石家庄050035 [2]河北省麻醉药技术创新中心,河北石家庄050035

出　　处：《保定学院学报》2024年第4期111-119,共9页Journal of Baoding University

基　　金：石家庄市麻醉药技术创新中心项目(石科【2019】34号);河北省生物制药国际联合中心项目(冀科外函【2022】3号)。

摘　　要：采用中红外(MIR)光谱(包括:一维MIR光谱及二阶导数MIR光谱)研究聚苯乙烯分子结构.实验发现,聚苯乙烯分子结构红外吸收模式主要包括:ν_(C)-H,ν_(asCH2),ν_(sCH2),ν_(C)=C,β_(C-H),γR=CH2和γC-H.采用二维MIR光谱进一步研究聚苯乙烯分子热变性.研究发现,聚苯乙烯分子主要官能团(ν_(C)-H,ν_(asCH2),ν_(sCH2),ν_(C)=C,β_(C-H),γ_(R)=CH2和γ_(C-H))热敏感程度及变化快慢顺序都存在着较大的差异性,并对相关机理展开研究,拓展了三级MIR光谱在重要的食品包装及机械材料(聚苯乙烯)分子结构及热变性的研究范围.The polystyrene molecular structure was characterized by the middle infrared(MIR)spectroscopy(including one dimensional MIR spectroscopy and second derivative MIR spectroscopy).The infrared absorption modes of polystyrene molecular includedν_(C)-H,νasCH2,ν_(sCH2),ν_(C)=C,β_(C-H),γR=CH2 andγC-H.The thermal denaturation of polystyrene molecular was considered by the two dimensional MIR spectroscopy also.The main functional group of polystyrene molecular(ν_(C)-H,νasCH2,ν_(sCH2),ν_(C)=C,β_(C-H),γ_(R)=CH2 andγ_(C-H))showed different sensitivity and order to the heat,and the mechanism was studied furthermore.The paper demonstrated the key roles of three-level MIR spectroscopy in the analysis of molecular structure and thermal denaturation of the important food packaging and mechanical materials(polystyrene).

关 键 词：聚苯乙烯 中红外光谱 二维中红外光谱 分子结构 热变性 

分 类 号：O434.3[机械工程—光学工程]