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考察了陈化温度对新癸酸钕(简称Nd)、氢化二异丁基铝(简称Al)和氯化二异丁基铝(简称Cl)组成的催化剂共聚合丁二烯-异戊二烯的影响。结果表明,催化剂的陈化温度对聚合产物的相对分子质量分布有明显的影响,采用较高陈化温度(50℃)所得催化剂,在催化剂3组分的加入顺序为Al、Cl、Nd或Cl、Nd、Al时,可获得窄相对分子质量分布(小于3.00)共聚物;催化剂3组分的加入顺序和陈化温度对共聚物的微观结构影响不大,2种单体单元的顺式-1,4-结构摩尔分数均在98%以上.
The effects of aging temperature on the copolymerization of butadiene-isoprene with neodymium neodecanoate (Nd), diisobutylaluminum hydride (Al) and diisobutyl aluminum chloride (Cl) Impact. The results showed that the aging temperature of the catalyst had a significant effect on the relative molecular mass distribution of the polymerization product. The catalyst prepared at the higher aging temperature (50 ℃), the addition order of the catalyst 3 components was Al, Cl, Nd or Cl , Nd, Al, the copolymer with narrow relative molecular mass distribution (less than 3.00) can be obtained. The order of addition of catalyst 3 and the aging temperature have little effect on the microstructure of the copolymer. The cis- The 1,4-structure mole fractions are above 98%.