%0 Journal Article
%T SIMULTANEOUS DETERMINATION OF MOLECULAR WEIGHT AND COMPOSITION OF SHORT CHAIN COPOLYMER BY QUANTITATIVE SIZE EXCLUSION CHROMATOGRAPHY<br>定量SEC法同时测定短链共聚物的组成和分子量
%A WANG Zhi-liu
%A ZHOU Cai-hua
%A QIAN Jun
%A CHENG Rong-shi
%A <br>王治流
%A 周采华
%A 钱军
%A 程鎔时
%J 高分子学报
%D 1995
%I 
%X he specific refractive index increments(dn/dc) of short chain polymerexhibit pronounced molecular weight dependency due to the fact that end groupcontributes much to the optical property of whole polymer chain. From the weightfraction additivity rule.(da/dc) of the whole polymer chain is the sum of thoseof corresponding structural units and it is indicated that changing the end group ofa given polymer,the molecular weight and (da/dc) of the polymer chain stem could be determined simultaneously by measuring (da/dc) of the whole polymers. Itis also possible to estimate the composition of the copolymer from (dn/dc) of the chain stem. This principle especially applicable to short chain polymers with pronounced end group effect.This principle is checked by quantitative size exclusion chromatography to measure (da/dc) of the benzene solution of oxyethylene-oxypropylenecopolymer with different end groups and satisfactory results are obtained.A method for simultaneously estimation of the molecular weight and composition of short chain copolymer by measuring (da/dc) of the sample solution withquantitative SEC was proposed.
%K Size exclusion chromatography
%K Short chain copolymer
%K Composition analysis<br>色谱
%K 共聚物
%K 组成分析
%K 聚环氧乙烷
%K 环氧丙烷
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=15971983683C7643EE80F1CE621DEB60&aid=9AA647BF396C5960788BAA793EE98828&yid=BBCD5003575B2B5F&iid=0B39A22176CE99FB&sid=3A0155B37D8FF829&eid=23104246A5FCFCEF&journal_id=1000-3304&journal_name=高分子学报&referenced_num=0&reference_num=2