天然橡胶中聚异戊二烯异构体结构中红外光谱研究  

Mid Infrared Spectroscopy Study on Structure of Natural Rubber Polyisoprene Isomers

作　　者：柴嘉欣 常利双 刘文雅 王雨欣 李阳 于宏伟[1,2] CHAI Jiaxin;CHANG Lishuang;LIU Wenya;WANG Yuxin;LI Yang;YU Hongwei(Shijiazhuang University College of Chemical Technology,Shijiazhuang 050035,China;Anesthetic Technology Innovation Center of Hebei Province,Shijiazhuang 050035,China)

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

出　　处：《特种橡胶制品》2024年第5期52-57,共6页Special Purpose Rubber Products

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)光谱法研究了天然橡胶(NR)中聚异戊二烯结构;采用变温去卷积MIR光谱进一步研究了温度变化对NR中聚异戊二烯异构体结构的影响。结果表明:293 K温度下,NR中存在着4种聚异戊二烯异构体(包括:顺式-1,4-构型、反式-1,4-构型、1,2-构型和3,4-构型);在293 K~393 K范围内,随着测试温度的升高,NR中聚异戊二烯4种异构体对应的吸收波数和强度都有一定的变化,NR中部分反式-1,4-聚异戊二烯构型转变成顺式-1,4-聚异戊二烯构型,是整个NR中聚异戊二烯异构体结构改变的一个关键步骤。The structure of natural rubber polyisoprene isomers was studied using mid infrared(MIR)spectroscopy.The effect of temperature changes on the structure of natural rubber polyisoprene isomers was investigated using temperature dependent deconvolution MIR spectroscopy.The results showed that there were four types of polyisoprene isomers in natural rubber at a temperature of 293 K,including cis-1,4-,trans-1,4-,1,2-,and 3,4-configurations.Within the range of 293 K to 393 K,with the increase of testing temperature,the absorption wave numbers and strengths corresponding to the four isomers of natural rubber polyisoprenehave changed to a certain extent.The transformation of the trans-1,4-configuration of some natural rubber polyisoprene to cis-1,4-configuration was a key step in the structural change of the entire isomer.

关 键 词：天然橡胶 异构体 聚异戊二烯 中红外光谱 变温中红外光谱 

分 类 号：TQ330.72[化学工程—橡胶工业] TQ332