MA/ATMP共聚物的微观结构及其热稳定性研究

Study on the Microstructures and Thermal Stability of MA/ATMP Copolymers

采用不同配比的反应型受阻胺 4 -丙烯酰氧基 - 2 ,2 ,6 ,6 -四甲基哌啶醇酯 (ATMP)与丙烯酸甲酯 (MA)进行溶液光引发共聚合。用核磁共振对共聚物的组成及其序列分布进行了表征。在此基础上 ,对不同微观结构的共聚物进行了热稳定性及玻璃化温度的测定 ,确定了共聚物中各基团的断裂分解温度、材料的玻璃化转变 。

MA/ATMP copolymers were prepared by the photo-induced solution copolymerization at various initial monomer ratios in toluene. The compositions and the sequence distributions of MA/ATMP copolymers were characterized with 1H-NMR. On this basis, the thermal stability of the copolymers with different microstructures and the glass transition temperature (Tg) were measured. Thus the splitting decomposition temperature of the groups in the copolymers and the glass state changes of the material as well as the relationship between these changes and the composition of the copolymer chains and the sequence distribution are confirmed.