本文应用示踪原子氚醇淬灭法,测出用多种稀土催化剂制得的聚丁二烯之“氚数均分子量”,并对稀土催化聚丁二烯氚数均分子量随转化率变化关系进行了讨论。本文还对某些稀土聚丁二烯氚数均分子量与渗透压法测定的数均分子量作了比较,其数值很相近,从而认为氚醇淬灭法有可能作为测定某些稀土聚丁二烯数均分子量的一种方法。 In this paper, tracer atom triterpene alcohol quenching method was used to measure the “tritium number average molecular weight” of polybutadiene prepared with a variety of rare earth catalysts, and the relationship between the number average molecular weight and the conversion rate of polybutadiene tritium catalyzed by rare earth Discussed. In this paper, the number average molecular weight of some rare earth polybutadiene tritium number average molecular weight and osmometry were compared, the numerical values ​​are very similar, and that triterpene alcohol quenching method may be used as a measure of some rare earth polybutadiene A method of number average molecular weight.