Research on Comb-shaped Copolymers of Polycarboxylate Superplasticizer*1
In this paper, the comb-shaped copolymers of polycarboxylate were synthesized by polyethylene glycol (PEG-n), acrylic acid (AA), methyl allylsulfonate sodium (MAS) and sodium 2-acrylamido- 2-methylpropanesulphonate (NaAMPS) as superplasticizer (SP). The effects of structure, composition of the copolymer on dispersing properties were investigated. The results show that the properties of superplastisizer were affected by the length and density of graft chain in copolymers. The superplasticizer has excellent dispersing capability when the length of graft chain is 23-35 in comploymers and the mol rate of NaAMPS is 10％-15％ in comploymers. The study shows that the molecular structure is similar to X404 (SP is made in Italy), and the fluidity properties of cement paste and holding are also more or less similar to those products with this superplasticizer addition of 0.12％.
comb-shaped copolymer of polycarboxylate superplasticizer macromolecular design synthesis
Guosheng Liao Qihua Liu Hongbo Tan Baoguo Ma
Wuhan University of Science and Technology China Xiangfan Management Institute of Building Security Identification China Wuhan University of Technology China
国际会议
2006现代科技国际研讨会(The International Workshop on Modern Science and Technology in 2006)
北京
英文
529-533
2006-04-01（万方平台首次上网日期，不代表论文的发表时间）