引用本文:
戴李宗, 邹友思, 姚青青, 潘容华. 基团转移嵌段共聚研究[J]. 应用化学,
1997, 14(5): 23-27.
Citation: Dai Lizong, Zou Yousi, Yao Qingqing, Pan Ronghua. Study on Group Transfer Block Copolymerization[J]. Chinese Journal of Applied Chemistry, 1997, 14(5): 23-27.
Citation: Dai Lizong, Zou Yousi, Yao Qingqing, Pan Ronghua. Study on Group Transfer Block Copolymerization[J]. Chinese Journal of Applied Chemistry, 1997, 14(5): 23-27.
基团转移嵌段共聚研究
摘要:
本文采用双官能团引发剂和负离子型催化剂进行了甲基丙烯酸甲酯和甲基丙烯酸C7~9酯的基团转移嵌段共聚.讨论了温度、单体投料方式、引发剂-催化剂浓度比及单体浓度对聚合反应的影响,认为当两段反应温度分别为85℃和25℃时,引发剂浓度[I]=1.35×10-2mol/L,催化剂引发剂浓度比[Cat]/[I]=0.126,以活性较低的C7~9MA为第一嵌段单体,有利于C7~9MA和MMA的嵌段共聚.测定了嵌段共聚物的热形变温度;用GPC对嵌段共聚物的相对分子质量及分布进行了表征,结合IR、1H NMR和热形变温度分析,证明所得到的为PMMA-PC7~9MA-PMMA均相三嵌段共聚物.
English
Study on Group Transfer Block Copolymerization
Abstract:
The group transfer block copolymerization of methyl-methacrylate(MMA) and C7~9 methacrylate(C7~9 MA) has been studied by using a bifunctional initiator and an anionic catalyst. The influences of temperature、monomer sequence、concentration ratio of initiator to catalyst and concentration of monomers have been investigated. When T1=85℃, T2=25℃,[I]=1.35×10-2 mol/L,[Cat]/[I]=0.126, C7~9 MA as first monomer, the block copolymerization of C7~9 MA and MMA appeared to be predominate. The thermal deformation temperatures of the copolymers obtained are reported. The triblock copolymer (PMMA-PC7~9 MA-PMMA) has been characteriaced by FT-IR, 1H NMR, and GPC as a homogeneous phase system.
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Key words:
- group transfer polymerization
- / block copolymerization
- / methacrylate
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