一种新型聚羧酸盐减水剂的合成及应用  

Synthesis and application of a new polycarboxylate superplasticizer

作　　者：王自为[1] 赵婷婷[1] 窦琳[1] 王玲[1] 刘春燕[1] 任建国[1] 李军平 裴继凯 

机构地区：[1]山西大学化学化工学院,山西太原030006 [2]山西合盛邦混凝土建材有限公司,山西太原030006

出　　处：《混凝土》2011年第4期76-79,共4页Concrete

摘　　要：采用水溶液聚合法,以过硫酸铵为引发剂,烯丙基聚乙二醇、马来酸酐和马来酸单甲酯为单体三元共聚合成含有羧基、酯基和聚氧乙烯基侧链的新型聚羧酸盐高效减水剂,并对该减水剂进行了红外、凝胶色谱表征。探讨了单体摩尔比、引发剂用量、反应时间、反应温度、大单体分子量对所合成聚羧酸盐减水剂性能的影响。结果表明,该聚羧酸盐减水剂具有低掺量、高分散性、高减水率等特点。在掺量为1%时,初始水泥净浆流动度达270 mm,减水率高达35%,混凝土的抗压强度得到大幅度的提高,适宜配制高性能混凝土。A new kind of polycarboxylate superplasticizer was synthesized by the terpolymerization of allyl polyethylene glycols（APEG）,maleic anhydride and monomethyl maleate in aqueous solution and ammonium persulfate as initiator.The water-reducer was characterized by IR and GPC.The influence of molar ratio of monomer,initiator amount,reaction time,reaction temperature,different APEG molecule weight on the performance of polycarboxylate superplasticizer were discussioned.The results showed that the polycarboxylate superplasticizer had low volume,high dispersion,high water reducing ratio and other characteristics.When the amount is 1%,the initial fluidity of cement paste up to 270 mm,water reduction up to 35%.Compressive strength of concrete has been greatly improved and it＇s suitable for preparation of high performance concrete.

关 键 词：聚羧酸减水剂 共聚 合成 高性能混凝土 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]