A GENERAL APPROACH TO DETERMINING THE EVOLUTION OF MOLECULAR WEIGHT DISTRIBUTION CURVES OF LINEAR POLYMERS UNDERGOING CHAIN SCISSION  

作　　者：Zhuo-li Lin Jun Luo Zheng-jian Chen Ke-hua Tu 王利群 王衍伟 

机构地区：[1]MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University [2]Department of Polymer Science and Engineering,College of Chemistry,Chemical Engineering and Materials Science,Soochow University

出　　处：《Chinese Journal of Polymer Science》2013年第7期1056-1060,共5页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 21074112);the Natural Science Foundation of Jiangsu Province (No. BK2012185)

摘　　要：A numerical method is developed to compute the development of molecular weight distribution （MWD） curves of linear polymers undergoing chain scission. The method can be applied to complex chain scission kinetics and for arbitrarily complex initial MWD curves. Our method is based on the method of lines （MoL）. Different from the existing numerical scheme, we propose the use of logarithmically spaced points. This development ensures the accuracy of the computed MWD curves at low molecular weights, and it does not require a very fine discretization to produce an accurate result.A numerical method is developed to compute the development of molecular weight distribution （MWD） curves of linear polymers undergoing chain scission. The method can be applied to complex chain scission kinetics and for arbitrarily complex initial MWD curves. Our method is based on the method of lines （MoL）. Different from the existing numerical scheme, we propose the use of logarithmically spaced points. This development ensures the accuracy of the computed MWD curves at low molecular weights, and it does not require a very fine discretization to produce an accurate result.

关 键 词：Polymer degradation Reaction kinetics Molecular weight distribution Modeling. 

分 类 号：O631.3[理学—高分子化学]