摘要：
Rare earth polybutadiene with ultra-high mass fraction of cis-1,4-units and different rela-tive molecular mass and narrow molecular weight distribution were prepared, and the continuous pilot industrial enlargement was realized. The effects of relative molecular mass and its distribution,mass fraction of cis-1,4-unit of rare-earth cis-1,4- poly-butadiene rubber on processing properties, physical and mechanical properties and dynamic mechanical properties were studied. The results showed that the number average molecular weight of the prepared rare-earth cis-1, 4- polybutadiene rubber were 1.1×105-3.4 ×105g/mol, and molecular weight distribution were narrow, the mass fraction of cis-1,4-unit were more than 98.0%, even up to 98.5%. When the mass fraction of cis-1,4-unit was more than 98.0%, processing properties, physical and mechanical properties and dynamic mechanical properties were excellent,and were further improved by the narrowing of molecular mass distribution. Also the compression heat and compression perma-nent deformation were reduced.%制备了不同相对分子质量、窄分子量分布的超高顺式稀土顺丁橡胶,并实现了连续中试工程放大.考察了稀土顺丁橡胶的相对分子质量及其分布、顺式-1,4-结构质量分数等对其加工性能、物理机械性能及动态力学性能的影响.结果表明,制备的稀土顺丁橡胶的数均分子量为1.1 ×105~3.4×105g/mol,分子量分布小于3.0,顺式-1,4-结构质量分数大于98.0%,甚至可达98.5%以上.当顺式-1,4-结构质量分数大于98.0%时,其加工性能、物理机械性能及动态力学性能优异,并随分子量分布变窄而进一步改善,压缩生热降低,压缩永久变形减小.
