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本工作用均相的稀土催化体系Nd(naph)_3-Al(i-Bu)_2H-CH_3SiHCl_2进行了丁二烯和异成二烯的本体共聚合,研究了聚合规律和产物的结构性能.结果表明,在适当的催化剂组分比条件下,该催化体系具有较高的催化活性,用DSC测定了共聚物的玻璃化转变温度,~1H-NMR和IR分别测定了共聚物的组成和微观结构,证明共聚物的组成主要决定于单体原料的配料比,共聚物中两种单体单元都具有高顺式结构,生胶和硫化胶的性能测定表明,在丁二烯和异戊二烯两种单体的配料比为30比70时,得到的共聚胶的综合性能较好.
In this work, bulk copolymerization of butadiene and isoprene with Nd (naph) _3-Al (i-Bu) _2H-CH_3SiHCl2 was carried out in a homogeneous rare earth catalyst system. The polymerization rules and the structural properties of the products were investigated. The results show that the catalyst system has high catalytic activity at the proper catalyst component ratio. The glass transition temperature of the copolymer was measured by DSC. The composition and microstructure of the copolymer were determined by ~ 1H-NMR and IR. , It is proved that the composition of the copolymer is mainly determined by the ratio of ingredients of the monomer raw materials. Both of the monomer units in the copolymer have a high cis structure, and the determination of the properties of the raw rubber and the vulcanized rubber shows that in the butadiene and the isoprene When the ratio of the two monomers is 30: 70, the overall performance of the obtained copolymer rubber is better.