添加碳酸乙烯酯的丙烯腈-丙烯酸甲酯共聚物的结构与性能

Structure and properties of acrylonitrile-methyl acrylate copolymers containing ethylene carbonate

在丙烯腈（AN）与丙烯酸甲酯（MA）的水相沉淀聚合过程中添加质量分数为5％～30％的碳酸乙烯酯（EC），合成含有EC的丙烯腈基共聚物．采用傅立叶变换红外光谱（FTIR）、差示扫描量热仪（DSC）、热重分析（DTG）和X射线衍射分析（XRD）等方法对聚合产物进行了分析．结果表明，EC几乎不参与两单体的自由基聚合，而仅作为一种独立成分存在于丙烯腈基聚合物的分子链中；随着EC含量的增加，共聚物的分解温度先升高后降低，而聚合物的熔融温度逐渐降低；聚合物的结晶度也随着EC含量的增加而呈现出降低的趋势．

Acrylonitrile （AN） / methyl acrylate （MA） copolymers containing 5%- 30 % of ethylene carbonate （ EC ） are synthesized by incorporating EC into the redox co-polymerization system. The properties of the copolymers are characterizd by using Fourier transform infrared spectroscopy （FTIR）, differential scanning calorimetry （ DSC ）, derivative thermogravimetry （DTG） and X-ray diffraction （XRD） etc. The results show that, EC does not react with the other two co-monomers. With the increasing of the content of EC, the decomposition temperature of the polymers rises firstly and then drops, however, both the melting point and the crystallinity of the co- polymers containing EC go down.