摘要
由马来酸酐与乙醇胺酰化酯化后得到的产物(T2),再与酯类大单体(T1)共聚得到一种新型两性型聚羧酸减水剂。试验结果表明,当马来酸酐与乙醇胺物质的量之比为1.05∶1.0,酰化酯化催化剂用量为马来酸酐质量的0.4%,在90℃下反应3 h条件下合成T2,T1与T2质量比为1∶3,过硫酸铵用量为T1与T2总质量的2.0%时,在95℃下反应3 h得到的两性型聚羧酸减水剂性能最佳。减水剂折固掺量为0.18%,W/C为0.29时,水泥净浆初始流动度达到300 mm,60 min净浆流动度达323 mm。
A new type of amphoteric polycarboxylate superplasticizer was synthesized by using an ester （T1） and a monomer（T2） which was synthesized by using maleic anhydride and neovaricaine. Experimental results show that the product obtained optimum performance when the maleic anhydride and mass of maleic anhydride,reaction for 3 h at 90℃,T molar ratio was 1.05：1.0,eatalyst for the acylation was 0.4% of the and T2 weight ratio was 1：3,the amount of ammonium persulfate was 2.0% of the total mass of TI and T2, and for 3 h reaction time at 95℃. The initial paste fluidity is 300 nun and amplifys to 323 mm 60 min later, when the dosage（converted into solid） is 0.18% and W/C is 0.29.
出处
《新型建筑材料》
北大核心
2011年第8期47-49,共3页
New Building Materials
关键词
酰化
酯化
聚羧酸减水剂
合成
acidylation, esterification： superplasticizer： synthesis
