反应型增溶剂对合成固体聚羧酸减水剂性能的影响研究

Study on the effect of reactive solubilizer on the performance of solid polycarboxylate superplasticizer prepared by bulk polymerization

以异戊烯醇聚氧乙烯醚大单体(IPEG)和丙烯酸(AA)为主要原料,分别采用马来酸二甲酯(DMM)、马来酸二乙酯(DEM)和衣康酸二甲酯(DI)等3种不同反应型增溶剂,通过本体聚合制备固体聚羧酸减水剂,研究了反应型增溶剂对固体聚羧酸减水剂性能的影响。结果表明,本体聚合中DMM用量为0.6%时,IPEG在熔融状态下的黏度可降低36.1%,单体转化率可提高9.5个百分点,合成固体聚羧酸减水剂的性能最佳,与常规水性减水型聚羧酸减水剂相近。

Taking isoprenyl oxy poly(ethylene glycol)ether macromonomer(IPEG)and acrylic acid(AA)as main raw materials,using dimethyl maleate(DMM),diethyl maleate(DEM)and itaconic acid Methyl ester(DI)three different reactive solubilizers to synthesize solid polycarboxylate superplasticizer by bulk polymerization method.The effect of the above reactive solubilizers on the performance of solid polycarboxylate superplasticizer was studied.The experimental results show that the performance of bulk polymerization was optimal when the DMM content was 0.6%,the viscosity of IPEG in molten state was reduced by 36.1%,and the conversion rate was 9.5 higher.The synthesized solid polycarboxylate superplasticizer reached the performance of aqueous PCE.