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用环烷酸希土盐 Ln(naph)_3为主催化剂合成的丁二烯-异戊二烯共聚橡胶,在微观结构上具有两种结构单元都是高顺式-1,4的特点,硫化胶性质方面,在丁/异戊比合适的情况下,具有优良的耐低温性质。同时发现,与同样是用希土催化剂得到的异戊橡胶及顺丁橡胶相比,丁-异戊共聚胶在硫化胶性质和硫化规律方面有一些很有意思的差别。为了弄清楚丁-异戊共聚胶结构和性能之间的关系,有必要首先考察分子量和分子量分布的影响。
Butadiene-isoprene copolymer rubber synthesized by using naphthenic acid rare earth salt Ln (naph) 3 as the main catalyst has the characteristics of high cis-1,4 on the microstructure and high vulcanization In terms of gum properties, it has excellent low temperature resistance properties under the proper d / e ratio. At the same time, it was found that Ding-isoprene copolymerization rubber has some interesting differences in vulcanizate properties and vulcanization rules compared with isoprene rubber and butadiene rubber which are also obtained with the use of a rare earth catalyst. In order to understand the relationship between the structure of Chitin-isoprene copolymer and its properties, it is necessary to first examine the effects of molecular weight and molecular weight distribution.