摘要
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 kinetics of slow monomer addition to multifunctional core-forming molecules in the synthesis of hyperbranched polymers was developed.Taking the conversion of monomer（x） as variable,the analytic expressions of molecular size distribution function,average degree of polymerization,polydispersity index and degree of branching were derived.These expressions are not only amenable to the polymerization with high monomer conversion,but also appropriate to describe the whole polymerization process.Comparison with the one-pot polymerization indicates that the slow monomer addition technique improves the molecular weight distribution and increases the degree of branching for the products obtained.
出处
《中国科学：化学》
CAS
CSCD
北大核心
2010年第4期336-343,共8页
SCIENTIA SINICA Chimica
基金
国家自然科学基金(20774038
50633010)资助
关键词
超支化聚合物
动力学
分子量分布
多分散性
支化度
hyperbranched polymer
kinetics
molecular weight distribution
polydispersity
degree of branching
