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保坍型聚羧酸系减水剂的合成及性能评价

作者:程玄1,宋健民2,熊旭峰3,吴洪特1,余奇1,于兵川1

关键字:保坍型,聚羧酸系,减水剂,合成,性能

 
(1.长江大学 化学与环境工程学院,湖北 荆州  434023;2.浙江广天构件股份有限公司,浙江 宁波  315021;
3.云南公投建设集团第五工程有限公司,云南 昆明  650228)
 
    摘要:采用异戊烯醇聚氧乙烯醚(TPEG),与马来酸酐(MA)、马来酸单甲酯(AMA)、丙烯酰胺(AM)及丙烯酸(AA)等原料进行聚合反应,制备了一种保坍型聚羧酸系减水剂。研究了单体配比、反应温度、引发剂用量、链转移剂用量对合成减水剂性能的影响。保坍型聚羧酸系减水剂的最佳合成工艺为:单体配比n(TPEG)∶n(AMA)∶n(MA)∶n(AM)∶n(AA)=1∶1∶2∶1∶1,反应温度为45 ℃,引发剂和链转移剂用量分别为单体总物质的量的6%和1.75%,所合成的保坍型聚羧酸系减水剂具有较好的保坍性,对不同的水泥具有较好的适应性。
    关键词:保坍剂;聚羧酸系减水剂;合成;性能评价
    中图分类号:TU528.042+.2        文献标识码:A        文章编号:1001-702X(2017)12-0066-04
 
Synthesis and performance evaluation of a polycarboxylate superplasticizer with slump retention
CHENG Xuan1,SONG Jianmin2,XIONG Xufeng3,WU Hongte1,YU Qi1,YU Bingchuan1
(1.School of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China;
2.Zhejiang Guangtian Component Limited Company,Ningbo 315021,China;
3.Yunnan Referendum Construction Group Fifth Engineering Co. Ltd.,Kunming 650228,China)
    Abstract:A slump retaining polycarboxylate superplasticizer was prepared by isopentenyl polyoxyethylene ether(TPEG),maleic anhydride(MA),acrylamide and monomethyl maleate(AMA),acrylamide(AM),acrylic(AA). The effects of such factors as the monomer ratio,reaction temperature,dosage of the initiator and chain transfer agent on the slump retaining polycarboxylate superplasticizer performance were discussed in this paper. The best synthesis process of slump retaining polycarboxylate superplasticizer is:the monomer ratio was n(TPEG)∶n(AMA)∶n(MA)∶n(AM)∶n(AA)=1∶1∶2∶1∶1,the reaction temperature is 45 ℃,the amount of initiator and chain transfer agent are 6% and 1.75%of the monomer molar amount respectively. The slump retaining polycarboxylate superplasticizer which was prepared had good slump retention and adaptability for different cement.
    Key words:slump retaining agent,polycarboxylate superplasticizer,synthesis,performance evaluation