摘要
聚羧酸系减水剂早期强度发展缓慢的问题限制了其应用。研究了以不同分子质量的大单体甲氧基聚乙二醇丙烯酸酯(MPEGA)、(甲基)丙烯酸和消泡单体合成早强型聚羧酸系高性能减水剂,确定了合成产品的最佳工艺条件为:n(MPEGA4000)∶n(丙烯酸)∶n(消泡单体)=1.0∶4.0∶0.2,中和剂为二乙醇胺。与市场上同类产品相比,合成的产品具有较高的早期强度,接近国外同类产品的性能。
The application of the polycarboxylate superplasticizer was restricted because of its low early strength. A high early strength polycarboxylate superplasticizer was synthesized by different molecular macromonomer MPEGA, （M）AA and a defoaming monomer. The experiment results showed that the copolymer had an excellent property when the molar ratio of MPEGA4000,AA and defoaming monomer was 1.0：4.0：0.2,which the neutralization agent was diethanolamine. Compared with the like product in the market,the copolymer had an higher early strength,achieving the performance of foreign product.
出处
《新型建筑材料》
2012年第4期45-47,共3页
New Building Materials
关键词
聚羧酸系减水剂
早期强度
消泡单体
中和剂
polycarboxylate superplasticizer
early strength
defoaming monomer
neutralization agent
