窄分子量分布聚甲基丙烯酸甲酯的研究进展

Progress of narrow molecular weight distribution polymethylmethacrylate

对比不同窄分子量分布PMMA的制备方法,从自由基聚合、阴离子聚合及活性自由基聚合3种体系角度分析:自由基聚合操作条件温和、适用范围广,但分子量分布的极限是2.0左右;阴离子聚合能够得到分子量分布小于1.2的PMMA,然而反应条件苛刻;活性自由基聚合兼具两者优势,能够在温和条件下获得极窄分子量分布的PMMA,展现出了明显的优越性,是未来工业化开发的方向。

The present review summarized three initiation systems to obtain narrow molecular weight distribution PMMA and compared the advantages. Free radical polymerization was widely used as its initiators and condition were easy to get, but the molecular weight distribution can only he larger than 2.0. Anionic polymerization could produce PMMA of narrow MWD（less than 1.2） ,however the reaction condition was very hard to reach. And the living radical polymerization showed great advantage than the other initiation systems, using living radical polymerization can get narrow MWD PMMA at normal conditions. It might be the hotspot in the future research.