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采用阴离子转阳离子的机理转移聚合方法 ,两步合成了丁二烯 2 乙基 2 唑啉二嵌段共聚物 (PBd b PEOx) ;第一步阴离子聚合丁二烯 ,然后使其带上端功能基团 ;第二步是 2 乙基 2 唑啉的阳离子开环聚合 .对产物用IR ,1HNMR ,GPC ,DMA ,TEM和SAXS等手段进行了广泛的结构表征 .结果表明 ,所得嵌段共聚物具有较高分子量和窄的分子量分布 ,而且其中的聚丁二烯段中的 1 ,4 结构含量可通过反应条件的控制来调节 .
Anionic to cationic cation transfer mechanism of polymerization, two-step synthesis of butadiene 2 ethyl 2 oxazoline diblock copolymer (PBd b PEOx); the first step of anionic polymerization of butadiene, and then bring it to the top with the function The second step is the cationic ring-opening polymerization of 2-ethyl 2-oxazoline. The product was characterized by IR, 1HNMR, GPC, DMA, TEM and SAXS. The results showed that the obtained block copolymer The material has a higher molecular weight and a narrower molecular weight distribution, and the 1,4-content of the polybutadiene segment therein can be adjusted by controlling the reaction conditions.