Is the polydispersity exponent of the hyperbranched polymers the 3/2 or 5/2?  

作　　者：BA Xinwu LIU Ying WANG Sujuan WANG Haijun 

机构地区：[1]College of Chemistry and Environment Science, Hebei University, Baoding 071002, China [2]Department of Chemistry, Hebei Normal University of Science and Technology, Qinhuangdao 066600, China

出　　处：《Chinese Science Bulletin》2006年第12期1526-1528,共3页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.20574016 and 20303006);the Natural Science Foundation of Hebei Province(Grant Nos.201072 and B2004000093).

摘　　要：The number of the hyperbranched polymers in the system is investigated for the polymerization process to give the asymptotic form of the concentration of the n-mer. The polydispersity exponent is calculated, which coincides with that of the classical result. Finally, the asymptotic forms of the number, the weight and the z-average degrees of the polymerization were evaluated analytically to obtain polydispersity index, which is close to 1 as the reaction is quantitatively completed.The number of the hyperbranched polymers in the system is investigated for the polymerization process to give the asymptotic form of the concentration of the n-mer. The polydispersity exponent is calculated, which coincides with that of the classical result. Finally, the asymptotic forms of the number, the weight and the z-average degrees of the polymerization were evaluated analytically to obtain polydispersity index, which is close to 1 as the reaction is quantitatively completed.

关 键 词：超分支聚合体 多分散指数 聚合过程 渐近形式 

分 类 号：O63[理学—高分子化学]