Using water separation technique,acrylic acid (AA) and polyethylene glycol (PEG) 1000,of which the ratio was 1.5,were esterified and the optimum esterification ratio of 90% could be reached under the condition of 110 ℃×3 h.Using polyoxyethylene acrylate macromonomer (PA) prepared in the esterification,AA and sodium methylacryl sulfonate (MAS) as monomers,a copolymer which could be used as superplasticizer was prepared by free radical copolymerization in n(PA);n(AA) :n(MAS) of 1 ;7 :3.When the synthesis condition was 80 ℃×5 h,the optimal dosage of initiator was 3.0%-4.0%,the fluidity of cement paste with the samples could reach 270 mm.By analyzing the effect of the content of residual small molecule sulfonic monomer on the properties of sample,n(MAS)/n(PA) was controlled in a range of 2.5-3.8.
参考文献
| [1] | Heon-Young Cho;Jung-Mok Suh .Effects of the synthetic conditions of poly{carboxylate-g-(ethylene glycol) methyl ether} on the dispersibility in cement paste[J].Cement and Concrete Research,2005(5):891-899. |
| [2] | 巫辉,郭惠玲,雷家珩,张荣国,刘勇.聚羧酸系高效减水剂的合成及其作用机理研究[J].武汉理工大学学报,2006(09):18-20,59. |
| [3] | Sakai E.;Daimon M.;Kawakami A. .Dispersion mechanisms of comb-type superplasticizers containing grafted poly(ethylene oxide) chains[J].Macromolecular symposia,2001(0):367-376. |
| [4] | 李崇智,冯乃谦,王栋民,侯云芬.梳形聚羧酸系减水剂的制备、表征及其作用机理[J].硅酸盐学报,2005(01):87-92. |
| [5] | K. Yamada;T. Takahashi .Effects of the chemical structure on the properties of polycarboxylate- type superplasticizer[J].Cement and Concrete Research,2000(2):197-207. |
| [6] | Chong-Zhi Li;Nai-Qian Feng;Yong-De Li .Effects of polyethlene oxide chains on the performance of polycarboxylate-type water-reducers[J].Cement and Concrete Research,2005(5):867-873. |
| [7] | T.-S. Liao;C.-L. Hwang;Y.-S. Ye .Effects of a carboxylic acid/sulfonic acid copolymer on the material properties of cementitious materials[J].Cement and Concrete Research,2006(4):650-655. |
| [8] | Ye YS;Huang HL;Hsu KC .A water-soluble acrylate/sulfonate copolymer. I. Its synthesis and dispersing ability on cement[J].Journal of Applied Polymer Science,2006(3):2490-2496. |
| [9] | Zhang Zhixian;Zhang Ruigao.Quantitative Analysis of Organic Functional Groups[M].北京:化学工业出版社,1990 |
| [10] | Yao Risheng.Medical Polymers Materials[M].北京:化学工业出版社,2003 |
| [11] | Rong-Guo Zhang;Hui-Ling Guo;Jia-Heng Lei.Effects of Molecular Structure on the Performance of Polyacrylic Acid Superplasticizer[J].Journal of Wuhan University of Technology(Materials Science Edition),2007:200. |
| [12] | Kao Corp (JP) .Process for the Production of Methacrylic Polymers[P].EP 1209178,2002-05-29. |
| [13] | Zhang Xinying;Cheng Jue;Zhao Jingbo.Polymer Chemistry[M].北京:化学工业出版社,2006 |
| [14] | Zhang Xiong.Construction Functional Admixtures[M].北京:化学工业出版社,2004 |
| [15] | Lin Yongda;Li Ganzuo;Gao Pingtan.Application of Surfactant in Cement and Asphalt Concrete[M].北京:中国轻工业出版社,2001 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%