Microstructural Characteristics Analysis of PCE Copolymer from Methyl Allyl Polyethylene Glycol and Methacrylic Acid based on Determination of Monomer Reactivity Ratios

作     者：WANG Ziming KANG Yaxin PENG Jingying 王子明;康亚欣;PENG Jingying

作者机构：College of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2021年第36卷第2期

页      面：223-229页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Funded by the Key Materials and Preparation Technology of Long-life Concrete Products Project(No.2017YFB0310002)through the National Key R&D Program 

主　　题：reactivity ratio polycarboxylate K-T method copolymer sequence distribution 

摘      要：The reactivity ratio of monomer and the microstructure of copolymer as polycarboxylate ether(PCE)superplasticizer were *** ethers(PCEs)were synthesized from methyl allyl polyethylene glycol(MAPEG,Mw=2400 g/mol)and methacrylic acid(MAA)via aqueous free radical copolymerization in low conversion(P20%).Gel permeation chromatography(GPC)and high performance liquid chromatography(HPLC)were used to track the residual concentration of the reactants and the amount of copolymer formed during the *** reactivity ratios of monomers,MAPEG and MAA,were determined as r1(MAPEG)=0.0489 and r2(MAA)=1.6173,respectively,by employing the K-T and YBR *** to the obtained monomer reactivity results,the sequence distribution of the copolymer,the number average length of MAA in the polymerisate were found to decline with the decrease of the mole fraction of MAA in the polymerization *** a result,the distribution of chain segments becomes narrower and the copolymer structure becomes more ***,uniform polymers could be obtained by slowly adding MAA monomer during copolymerization process.