辅助催化剂B的加入可灵活调整产品的数均分子量；
The average molecular weight of polyoxytetramethylene glycol could be flexibly controlled by varying the amount of cocatalyst B.
温度升高，聚合反应的转化率增加，聚合产物数均分子量降低；
The number-average molecular weight of the polymer decreased, the molecular weight distribution was slightly wide, but the conversion increased as the polymerization temperature increasing.
考察了聚合条件对共聚物数均分子量和醋酸乙酯(VA)质量分数的影响。
Effects of polymerization conditions on the copolymer molecular weight and VA weight content were studied.
用甘油基作标准求出了聚醚的数均分子量，结果表明此法准确、方便、快速。
The glyceryl was used as standard to calculate Number—Average Molecular Weight of polyether. The result showed that it was accurate, convenient and high speed method.
首先，数均分子量随转化率的增加线性增长，且与活性聚合理论计算分子量相符；
The molecular weight of obtained polystyrene increases linearly with the overall conversion and agrees with the theoretically predicted molecular weight.
结果表明核磁共振内标法求聚氧丙烯甘油醚类化合物数均分子量快速，方便，准确。
The results show that It is a high speed, convenient and accurate method as compared with end-group analytical method.
所得聚合物的数均分子量随单体转化率的增加而线性增长，而且分子量呈单峰分布。
The number averaged molecular weights of the obtained polymers increased linearly with monomer conversion, and molecular weight distributions were unimodal throughout the reaction.
此外，结果表明，在低转化阶段，数均分子量不随转化率改变，仅与聚合反应温度有关。
In addition, the obtained results showed that the number average molecular weight is independent of the conversion and only relative to the reaction temperature at lower conversion stage.
温度升高，聚合反应的转化率增加， 但产物的数均分子量及分子量分布无明显变化；
The number-average molecular weight and molecular weight distribution of the polymer were not sensitive to temperature.
GPC测得共聚物的数均分子量为4934，多分散指数是1.978，具有较窄的分子量分布。
The data of GPC indicate that the number-average molecular is 4934 and the polydispersity is 1.978 with a narrow molecular distribution.
用稀溶液粘度法测定了几种不同氯化聚丙烯粘均分子量，并且将稀溶液测定的特性粘数与一般工业使用浓度的粘度联系起来。
The viscosity average molecular weighs of several different CPPs were determined by dilute solution viscometry and the intrinsic viscosity was related to the viscosity of industry concentration.
用稀溶液粘度法测定了几种不同氯化聚丙烯粘均分子量，并且将稀溶液测定的特性粘数与一般工业使用浓度的粘度联系起来。
The viscosity average molecular weighs of several different CPPs were determined by dilute solution viscometry and the intrinsic viscosity was related to the viscosity of industry concentration.
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