两种醚类聚羧酸减水剂的合成和应用  

Synthesis and application of two kinds of polycarboxylate ether superplasticizer

作　　者：马保国[1] 胡家兵[1] 谭洪波[1] 

机构地区：[1]武汉理工大学硅酸盐工程建筑材料国家重点实验室,湖北武汉430070

出　　处：《新型建筑材料》2012年第5期1-4,共4页New Building Materials

基　　金：国家973计划项目(2009CB623201);国家自然科学基金项目(51002110)

摘　　要：分别在65℃和室温下合成APEG型和TPEG型2种不同分子结构的醚类聚羧酸减水剂。通过红外光谱对其分子结构进行表征,讨论了反应温度、引发剂种类对APEG体系分散性能的影响。结果表明,当n(APEG)∶n(MA)∶n(SMAS)=1.0∶2.4∶0.4,用苄胺复合引发剂(IM)替代常用过硫酸铵(APS)引发剂时,不但能降低合成温度而且提高了减水剂的分散性能。此外,对2种体系减水剂进行复配研究,解决了APEG型减水剂经时损失大和TPEG型价格昂贵等问题,拓宽了2种减水剂在不同等级混凝土中的应用范围。Two kinds of polycarboxylate ether superplasticizer（APEG type and TPEG type）with different molecular structures were synthesized respectively under 65 ℃ and room temperature conditions and characterized by IR. The effects of the type of initiator, reaction temperature on the dispersant＇s performance of APEG system were investigated. The result showed that when the molar ratio of APEG to MA to SMAS is 1.0：2.4：0.4,and initiator（benzylamiue compound） substitutes initiator（APS）,which not only reduced the synthesis temperature but also improved dispersing capability. In addition,by research on compound teehnology,a series of problems such as high slump-loss owned by APEG type admixture and expensive cost owned by TPEG type admixture have been resolved and the scope of the application of different levels＇ concrete have also been broadened.

关 键 词：聚羧酸减水剂 常温合成 应用 

分 类 号：TU528.042[建筑科学—建筑技术科学]