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详细分析了单体慢加入到多官能度核分子中制备超支化聚合物的动力学过程,以单体转化率为参数导出了产物的聚合度分布函数、平均聚合度、多分散性指标和支化度等分子参数的解析式,计算结果与文献报道的实验数据十分一致.分子参数依赖于核的官能度(f)、核分数(α)和单体转化率(x),这为通过聚合反应条件来进行分子结构的设计提供了理论依据.与一步聚合方法的产物相比,单体慢加入技术能够改进产物的分子量分布,提高其支化度.
The kinetic process for preparing hyperbranched polymers by slowly adding monomers into multifunctional nuclear molecules was analyzed in detail. The polymerization degree distribution function, average degree of polymerization, polydispersity index and branch The analytical results are in good agreement with the experimental data reported in the literature.The molecular parameters depend on the functionality (f), the nuclear fraction (α) and the monomer conversion (x) of the core, which is determined by the polymerization Reaction conditions to design the molecular structure provides a theoretical basis.Compared with the product of one-step polymerization method, the monomer slowly adding technology can improve the molecular weight distribution of the product to improve its degree of branching.