| 梳形聚羧酸系减水剂的制备、表征及其作用机理 | |
| 李崇智 ; 冯乃谦 ; 王栋民 ; 侯云芬 ; LI Chongzhi ; FENG Naiqian ; WANG Dongmin ; HUO Yunfen | |
| 2010-06-07 ; 2010-06-07 | |
| 关键词 | 聚羧酸系减水剂 梳形分子结构 分散与流动保持性能 polycarboxylate-type water-reducers comb-like molecular structure dispersing and flowing retention ability TU528 |
| 其他题名 | PREPARATION AND CHARACTERIZATION OF COMB-LIKE POLYCARBOXYLIC WATER-REDUCERS AND ITS FUNCTION MECHANISM |
| 中文摘要 | 聚羧酸系减水剂具有高减水率和控制混凝土坍落度损失等优点,研究开发新型聚羧酸系减水剂受到广泛关注。以甲基丙烯磺酸钠、2丙烯酰胺2甲基丙磺酸、丙烯酸、不同聚氧化乙烯基(polyoxyethlenegroup,PEO)链长的聚乙二醇丙烯酸酯等单体制备了改进聚羧酸系减水剂(modifiedpolycarboxylicwater reducers,MPC)。表征了MPC的分子结构与性能,讨论了MPC的分散稳定机理。研究表明:MPC具有梳形分子结构,应用MPC后混凝土的减水率能达到25%以上,其分散性与分散保持性能与减水剂的PEO侧链长短有关,其主要通过立体位阻起作用。; The research and development for polycarboxylic acid type water-reducers were attracted much attention because of their excellent ability of water-reducing and preventing the slump loss of concrete. Modified polycarboxylic water-reducers (MPC) were copolymerized from sodium methallyl sulfonate, acrylic acid, 2acrylamido2methyl propane sulfonic acid, polyethylene glycol mono-acrylates with different length of polyoxyethlene group(PEO)chains. Molecular structures and properties of the polycarboxylic acid type water-reducers were characterized, and the mechanism of their dispersing and stablizing action were also discussed. Results indicate that the water reducing ratio for the MPC with comb-like molecular structure are obtained over 25% and the high dispersing and flowing retention property are mainly affected by the length of side chains of PEO through steric repulsive force. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/46383]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 李崇智,冯乃谦,王栋民,等. 梳形聚羧酸系减水剂的制备、表征及其作用机理[J],2010, 2010. |
| APA | 李崇智.,冯乃谦.,王栋民.,侯云芬.,LI Chongzhi.,...&HUO Yunfen.(2010).梳形聚羧酸系减水剂的制备、表征及其作用机理.. |
| MLA | 李崇智,et al."梳形聚羧酸系减水剂的制备、表征及其作用机理".(2010). |
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