摘要
通过合成的聚乙二醇马来酸半酯大单体(PMAn)取代部分烯丙基聚氧乙烯醚(XPEG)进行共聚反应,得到了徐放型聚羧酸系高性能减水剂。合成影响因素的研究结果表明,当PMAn分子量为750且PMAn取代XPEG的比例为20%时,减水剂的减水率和保坍能力最好。红外光谱分析结果表明,合成的减水剂未聚合的单体残留很少;采用合成的减水剂配制的混凝土具有突出的坍落度保持能力。
Polyethylene glycol maleate macromonomers（PMAn） is used to substitute partially for allylpolyethenoxy ether（XPEG） to synthesize a slow-release polycarboxylate-type water-reducing agent by eopolymerization reaction. It is shown that when PMAn to replaces 20% XPEG and PMAn molecular weight is 750, the resulting product has high water-reducing ratio and excellent slump-control capability. Accordiong to analysis of infrared spectra, few monomer residuals are found in the product after polymerization Concretes prepared by the product have outstanding slump retention ability
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第20期55-57,65,共4页
Materials Reports
基金
国家自然科学基金项目(50972170)
关键词
聚羧酸减水剂
徐放
合成
聚乙二醇马来酸半酯
polycarboxylate superplasticizer, slow-release, synthesis, polyethylene glycol maleate
