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研究了丁二烯(Bd)和异戊二烯(Ip)在Nd(naph)_3-Al(i-Bu)_3-Al_2Et_3Cl_3(Nd-Al-Cl)催化体系中的本体共聚合反应。当[Nd]≥4×10~(-7)mol/g单体时,转化率可达80％以上,并随Al/Nd(mol比)值的增大而提高,大于40时,转化率趋于平坦;而共聚物[η]则下降。Bd/Ip对转化率无影响,Bd/Ip=30/70时,[η]有最低值,所得硫化胶性能较好,共聚物T_t随Bd含量的增加而降低,并介于IR和BR之间。共聚物的组成比与单体配比相近似,其中顺式-1,4 Bd链节含量大于99％,顺式-1,4 Ip链节含量为96％。
The bulk copolymerization of butadiene (Bd) and isoprene (Ip) in Nd (naph) _3-Al (i-Bu) _3-Al_2Et_3Cl_3 (Nd-Al-Cl) When [Nd] ≥4 × 10 ~ (-7) mol / g, the conversion rate can reach more than 80% and increases with the increase of Al / Nd ratio. When the ratio is higher than 40, Tends to be flat; whereas the copolymer [η] decreases. Bd / Ip has no effect on the conversion. When Bd / Ip = 30/70, [η] has the lowest value, and the obtained vulcanizate has good performance. The copolymer T_t decreases with the increase of Bd content, between. The composition ratio of the copolymer is similar to that of the monomer, in which the content of cis-1,4 Bd chain is more than 99% and the content of cis-1,4 Ip chain is 96%.