CAJ | 학술논문

作为新型高性能减水剂，聚羧酸减水剂优越的分散性能取决于其分子结构可设计性。该文以改性大单体TPEG、丙烯酸（ AA）和马来酸酐（ MAD）等单体为主要原料合成聚羧酸减水剂，通过Ft－IR和GPC表征减水剂分子量、官能团类型和比例，并探讨减水剂在水泥净浆和砂浆中的分散性能。结果表明，以－COOH官能团为主导的减水剂减水性能较好，保坍性能则较差；以一定比例的－COOH和－COOR组成的官能团为主导的减水剂保坍性能较好，初始减水性能较差。随着n（－COOH）／n（－COOR）的不断增大，减水剂减水性能逐渐变差，保坍性能逐渐变好。
작위신형고성능감수제，취최산감수제우월적분산성능취결우기분자결구가설계성。해문이개성대단체TPEG、병희산（ AA）화마래산항（ MAD）등단체위주요원료합성취최산감수제，통과Ft－IR화GPC표정감수제분자량、관능단류형화비례，병탐토감수제재수니정장화사장중적분산성능。결과표명，이－COOH관능단위주도적감수제감수성능교호，보담성능칙교차；이일정비례적－COOH화－COOR조성적관능단위주도적감수제보담성능교호，초시감수성능교차。수착n（－COOH）／n（－COOR）적불단증대，감수제감수성능축점변차，보담성능축점변호。
As a new type of high performance water -reduce admixture , the superior dispersity of polycarboxylate superplasticizer is based on the good design ability of molecular structure .In this article, polycarboxylate superplasticizer is synthesized by acrylic acid (AA), maleic anhydride(MAD) and methyl alkenyl polyoxyethylene polyoxypropylene ether ( TPEG).The molecular weight and functional group are characterized by Ft -IR and GPC.The disparity is discussed by cement paste and mortar .The result shows that the functional group -COOH plays an important role on dispersive performance while -COOR majorly contributes to slump retaining.With the n(-COOH)/n(-COOR) gradually increases , the dispersive performance of polycarboxylate superplasticizer become better and the slump retaining becomes worse .