一种马来酸酐型聚羧酸系减水剂的合成与表征  

Synthesis and Characterization of Maleate Polycarboxylate Based Superplasticizer

作　　者：李继新[1] 王海玥[1] 

机构地区：[1]沈阳工业大学石油化工学院,辽阳111003

出　　处：《硅酸盐通报》2015年第6期1530-1535,共6页Bulletin of the Chinese Ceramic Society

基　　金：辽宁省博士启动基金(20131084)

摘　　要：以过硫酸铵(APS)为引发剂,马来酸酐(MAH)、自制N-聚乙二醇单甲醚-N'-氨基甲酰马来酰亚胺(MPNCM)和甲基丙烯磺酸钠(SMAS)为聚合单体,合成N-聚乙二醇单甲醚-N'-氨基甲酰马来酰亚胺-甲基丙烯磺酸钠-马来酸酐共聚物(SP)。通过FI-IR和1H-NMR谱图对SP结构进行表征。以净浆流动度为指标,考察了投料方式、引发剂用量、反应温度、MAH/SMAS摩尔比和MPNCM/SMAS摩尔比对净浆流动度的影响。实验结果表明:最佳反应条件为MPNCM/SMAS摩尔比为1.2,MAH/SMAS摩尔比5.0,并将0.15wt%APS和MPNCM、SMAS缓慢滴加到的MAH水溶液,控制反应温度为60℃。以最佳反应条件制备的SP具有较好的工作性能和分散效果,掺量为0.2wt%时,减水率达26.6%,净浆流动度达288 mm。Polycarboxylate based superplasticizer （SP） was prepared from maleic anhydride （MAH）, sodium methylallyl sulfonate （SMAS） and self-made N-methoxypolyethylene glycols-N 1-carbamoyl maleimide（MPNCM） with ammonium persulphate（APS） as initiator. The molecular structure of SP was characterized by FI-IR and H-NMR. Effects of the feeding mode, the degree of initiator, polymerization temperature, MAH/SMAS monomer mole ratio and MPNCM/SMAS monomer mole ratio were investigated with initial fluidity as measurement index. The result shows that the optimal condition includes： the monomer mole ratio of MAH/SMAS is 5.0, the monomer mole ratio of MPNCM/SMAS is 1. 2, the amount of initiator is 0. 15wt% and the reaction temperature is 60 ~C. APS, MPNCM and SMAS are slowly dripped into reaction system. The SP prepared under optimal condition has good plasticizing, the water-reducing ratio is 26.6% and the initial fluidity of cement paste reaches 288 mm with the 0.2wt% of SP.

关 键 词：马来酸酐 甲基丙烯酸磺酸钠 N-聚乙二醇单甲醚-N'-氨基甲酰马来酰亚胺 聚羧酸系减水剂 

分 类 号：TU528[建筑科学—建筑技术科学]