论文部分内容阅读
甲基丙烯酸十六酯在有机溶剂中聚合时,溶剂结构对聚合速度没有显著影响。聚合体的平均分子量主要是受溶剂的链转移常数控制的,但在聚合过程中当生成的高聚物分子具有近似平均分子量时,由于高聚物分子在不同溶剂中具有不同的分子形态所产生的不同程度的粘度效应,对高转化率聚合体的平均分子量产生影响;同时,在高转化率聚合过程中聚合体平均分子量的均匀性与高聚物分子在溶剂中的形态有关,而与由聚合物的不同平均分子量在溶剂中所表现的不同粘度无关。
When the hexadecyl methacrylate is polymerized in an organic solvent, the solvent structure has no significant effect on the rate of polymerization. The average molecular weight of a polymer is primarily controlled by the chain transfer constant of the solvent but when the resulting polymer molecules have an approximate average molecular weight during polymerization due to the different molecular morphology of the polymer molecules in different solvents Of different degrees of viscosity effect on the average molecular weight of the high conversion rate polymer impact; the same time, high conversion rate polymerization process average molecular weight uniformity and polymer molecules in the solvent morphology, but with The different average molecular weights of the polymers are independent of the different viscosities exhibited in the solvent.