7-辛烯-1醇聚氧乙烯醚制备及其合成减水剂研究  

Synthesis and properties of polycarboxylate superplasticizer from 7-octene-1 alcohol polyoxyethylene ether

作　　者：张志勇 周栋梁 杨勇 舒鑫 冉千平 ZHANG Zhiyong;ZHOU Dongliang;YANG Yong;SHU Xin;RAN Qianping(State Key Laboratory of High Performance Civil Engineering Materials,Nanjing 211100,China;Jiangsu Sobute New Materials Co.Ltd.,Nanjing 211103,China)

机构地区：[1]江苏苏博特新材料股份有限公司,江苏南京211100 [2]江苏省建筑科学研究院有限公司,江苏南京211103

出　　处：《新型建筑材料》2024年第4期1-5,9,共6页New Building Materials

摘　　要：采用7-辛烯-1醇(OEA)与环氧乙烷(EO)在氢化钠(NaH)催化下发生开环反应制得聚醚大单体,再将大单体与丙烯酸(AA)共聚制得新型醚类聚羧酸减水剂。结果表明,采用占大单体质量0.05%的Na H催化剂,聚醚的有效含量最高达到97%左右。随着聚醚重均分子质量增大,分散性能先提高后降低,当聚醚重均分子质量为4000时,得到的减水剂性能最优,合适的反应条件为:酸醚比[n(AA):n(OEA4000)]=7、引发剂(维生素C)、双氧水和链转移剂(巯基乙醇)用量分别为单体总物质的量的0.6%、2.4%、4.0%。合成的减水剂减水和保坍性能与常规甲基烯丙醇聚醚(HPEG)合成的减水剂相当,但引气及稳泡性能明显增强,能较好地改善混凝土的和易性。In this paper,Sodium hydride(NaH)as catalyst,7-octene-1 alcohol polyoxyethylene ether macromonomer was prepared by ring-opening polymerization of ethylene oxide(EO)induced by 7-octene-1 alcohol(OEA).Then,a new type of Polycarboxylate Superplasticizer was prepared by copolymerization of 7-octene-1 alcohol polyoxyethylene ether macromonomer and acrylic acid.The results show that with 0.05%(macromonomer mass)NaH,the highest effective content of polyether is about 97%.With the increase of molecular weight of polyether,the dispersion ability of PCE increases first and then decreases.When the molecular weight of polyether is 4000,the performance of PCE is optimal.The optimum conditions were n(AA)∶n(OEA4000)=7,the dosage of Vc,hydrogen peroxide and mercaptoethanol were 0.6%,2.4%and 4%of total monomer mole.The dispersion and liquidity retention of PCE are close to that of HPEG-PCE,but the bubble stability is obviously enhanced,which can better improve the workability of concrete.

关 键 词：OEA 合成 聚羧酸减水剂 降黏 和易性 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]