Synthesis and Characterization of Polyisoprene−Poly(methyl methacrylate) AB Diblock and A2B2 Heteroarm Star Copolymers
Synthesis and Characterization of Polyisoprene−Poly(methyl methacrylate) AB Diblock and A2B2 Heteroarm Star Copolymers
复制标题
聚异戊二烯-聚甲基丙烯酸甲酯AB二嵌段和A2B2杂臂星形共聚物的合成与表征
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
R. Tack
中科院分区：
文献类型：
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作者：
C. Fernyhough;†. A. R. N. Young;R. Tack
以聚异戊二烯（PI）和聚甲基丙烯酸甲酯（PMMA）为原料，采用活阴离子聚合法合成了A2B2异臂星。用二乙烯基偶联剂1,1-（1,2-乙二基）双（4-（1-苯乙烯基）苯）（EPEB）连接聚异戊烯基锂链，生成可引发甲基丙烯酸甲酯（MMA）聚合的dianion，从而形成四臂星。采用阴离子序贯聚合法制备了PI−PMMA双嵌段。表征采用粒径排除色谱（SEC）， 1H NMR和膜渗透法进行。用甲苯磺酰肼对聚合物加氢得到相应的聚（乙烯-丙烯）- PMMA星形和二嵌段。
The synthesis of A2B2 heteroarm stars, where A is polyisoprene (PI) and B is poly(methyl methacrylate) (PMMA) has been achieved using living anionic polymerization. A divinyl coupling agent 1,1-(1,2-ethandiyl)bis(4-(1-phenylethenyl)benzene) (EPEB) was used to link together polyisoprenyllithium chains and create a dianion from which methyl methacrylate (MMA) polymerization could be initiated and thus form a four-armed star. PI−PMMA diblocks were synthesized by sequential anionic polymerization. Characterization was performed using size exclusion chromatography (SEC), 1H NMR, and membrane osmometry. Hydrogenation of the polymers using toluenesulfonyl hydrazide yielded the corresponding poly(ethylene-alt-propylene)−PMMA stars and diblocks.