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以含硝基偶氮苯侧基的丙烯酸酯液晶聚合物为研究对象,利用DSC、WAXD、偏光显微镜等手段研究了分子结构对侧链液晶聚合物结晶行为的影响.结果表明:丙烯酸酯类液晶聚合物的晶区是由介晶基团的规整排列形成的,大分子主链和柔性间隔基不参与结晶.随着柔性间隔基长度的增加,晶区分子排列有序性提高,结晶度增大;非晶共聚组分MA含量的增加,限制了介晶基团的有序排列,当MA含量超过83％后,只得到非晶共聚物.
The influence of molecular structure on the crystallization behavior of side-chain liquid crystal polymer was studied by DSC, WAXD and polarized light microscope using the acrylate liquid crystal polymer containing nitrozobenzene side groups as the research object.The results showed that: The crystal domains of the polymer are formed by the regular arrangement of the mesogenic groups, and the macromolecule main chain and the flexible spacer do not participate in the crystallization. As the length of the flexible spacer increases, the order of the crystal molecules improves and the degree of crystallinity increases . The increase of the content of MA in the amorphous copolymer limited the ordered arrangement of the mesogenic groups. When the content of MA exceeds 83%, only the amorphous copolymer is obtained.