大单体技术合成甲基丙烯酸甲酯—丙烯酸丁酯规整接枝共聚物

采用大单体技术合成了以聚甲基丙烯酸甲酯（PMMA）为主链，聚丙烯酸丁酯（PBA）为支0甸的规整接枝共聚物。产物提纯后用红外光谱表征结构。研究了封端反应时间，体系浓度对封端效率的影响以及PBA大单体与投料总量的质量比，引发剂用量，共聚反应温度对接枝效率的影响，还研究了接枝共聚物的力学性能，当聚丙烯酸丁酯大单体的相对分子质量大于5000，PBA大单体与投料总量的质量比约为60％时，此接枝共聚物是一种性能良好的热塑性弹性体。

Synthesis of Methyl Methacrylate - Butyl Acrylate Graft Copolymer with Uniform Branched Chain Using Macromer Technique

Methyl methacrylate - butyl acrylate graft copolymer with uniform branched chain was synthesized using a macromer technique. The graft copolymer was characterized by IR spectra. Effects of reaction time and system con-centration on the termination efficiency and effects of mass ratio of PBA macromer to total charge, amount of initia-tor, and reaction temperature on the graft efficiency were studied. Mechanical properties of the graft copolymer were also studied. The graft copolymer was a kind of thermoplastic elastomer with good properties when molecular weight of PBA macromer was more than 5 000 and mass ratio of PBA macromer to tatal charge was about 60 % .