【摘要】 在聚合温度为-30°～50°范围内,用FeCl₃-（i-C₄H₉）₃Al-phen催化体系合成出（顺1,4-1,2）等二元聚丁二烯,用臭氧解和¹³C-NMR方法研究了它们的序列结构。结果表明,这些聚合物的顺-1,4和1,2-链节都是非交替的。聚合温度高的样品比较接近Bernou-lli无规分布,而聚合温度低的样品的序列排布偏离无规分布。讨论了聚合机理。更多还原

【Abstract】 With the catalyst system, FeCl₃-（i-C₄H₉）₃Al-phen, （cis-1, 4—1, 2）equibinary polybu-tadiene was obtained at the polymerization temperature of-30—50℃. By gas-chromato-graphic analysis of the ozonolysis product of the polymer and ¹³C-NMR determinationit was found that the sequence distribution was not of alternating type. The sequencedistribution of the polymer at high polymerization temperature appeared near the Ber-noullian statistical and at low temperature it deviated from the random distributionmodel,The polymerization mechanism has been discussed briefly。更多还原