偶氮苯
材料科学
单体
聚合
聚合物
差示扫描量热法
高分子化学
傅里叶变换红外光谱
甲基丙烯酸酯
甲基丙烯酸甲酯
红外光谱学
侧链
红外线的
自由基聚合
光化学
化学
有机化学
化学工程
光学
复合材料
工程类
物理
热力学
作者
Wei Xing Chen,Xiaolong Zhang,Chun Yan Luo,Jie Ai,Yong Qiang Gu
出处
期刊:Materials Science Forum
日期:2015-03-01
卷期号:815: 649-655
标识
DOI:10.4028/www.scientific.net/msf.815.649
摘要
In order to study the infrared spectral characteristics of side-chain liquid crystal polymer, an infrared monomer containing a permanent dipole azobenzene group spaced from the methacryloyl moiety by a polymethylene segment was synthesized in three steps starting from 4-cyanoaniline. The monomer was polymerized with a push-pull azobenzene monomer, (-)-menthy1 methacrylate in the presence of azobisisobutyronitrile (AIBN) as the radical initiator. Structurally similar amphiphilic polymers were obtained by polymerization of analogous methacrylates in which the polymethylene spacers was replaced by oligo (oxyethy1ene) segments. The obtained polymer was characterized by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectro photometry (UV-vis), Hot Stage Polarized Microscopy (HS-POM), Differential Scanning Calorimetry (DSC) and Thermo Gravimetric Analyzer (TGA). Its infrared emissivity at different temperatures was tested by Bruker-V70 infrared analyzer. The results showed that the azobenzene poly (methyl methacrylate) (azo-PMMA) has high glass transition temperature(about 40°C), good thermal stability(divied in 294°C) and low infrared emission under 70%.
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