摘要
采用变温红外光谱技术,分别研究了封口膜(Parafilm)的一维变温红外光谱和二阶导数变温红外光谱。研究发现:Parafilm主要存在着甲基的不对称伸缩振动峰、亚甲基的不对称伸缩振动峰、亚甲基的对称伸缩振动峰、亚甲基的变角振动峰(δ_(CH_2))、甲基的不对称变角振动峰(δ_(asCH_3))、甲基的对称变角振动峰、C—C骨架伸缩振动峰和亚甲基的面内摇摆振动峰,最终确定Parafilm的主要结构是聚异丁烯,其临界温度(由结晶转变为无规的温度)为40℃;以Parafilm的δ_(CH_2)和δ_(asCH_3)为对象,进一步研究了相关二维红外光谱;拓展了变温红外光谱技术及二维红外光谱技术在高分子包装材料结构方面的研究范围。
The one-dimensional variable temperature infrared spectra and second derivative variable temperature infrared spectra of Parafilms were characterized by variable temperature infrared spectroscopy.The results show that there exist CH3 asymmetrical stretch vibration,CH2 asymmetrical stretch vibration,CH2 symmetrical stretch vibration,CH2 scissoring vibration(δCH2),CH3 asymmetrical scissoring vibration(δasCH3),CH3 symmetrical scissoring vibration(δsCH3),C-C stretch vibration and CH2 rocking vibration in Parafilms.The Parafilm is mainly composed of polyisobutene whose critical phase transition(crystalline to amorphous)temperature is 40℃.The two-dimensional infrared spectra ofδCH2 andδasCH3 were observed as well.The application of variable temperature infrared spectroscopy and two-dimensional infrared spectroscopy in analysis of structure of the polymer packing materials were explored.
作者
王维
常明
杜林楠
范济瑜
关胜琴
于宏伟
Wang Wei;Chang Ming;Du Linnan;Fan Jiyu;Guan Shengqin;Yu Hongwei(College of Light Industry and Textile,Qiqihar University,Qiqihar 161006,China;Shijiazhuang College School of Chemical Engineering,Shijiazhuang 050035,China)
出处
《合成树脂及塑料》
CAS
北大核心
2018年第2期18-23,共6页
China Synthetic Resin and Plastics
基金
石家庄市科学技术研究与发展计划课题(171501232A)
石家庄学院化工工艺科研团队(2017)
关键词
聚异丁烯
封口膜
红外光谱
结构
polyisobutene
Parafilm
infrared spectroscopy
structure
