Effect of Sodium Methylacrysulfonate upon the Molecular Weight and Performance of Polycarboxylate Superplasticizer

Abstract:

The effect of sodium methylacrysulfonate (SMAS) upon the molecular weight, molecular weight distribution and polycarboxylate (PCE)’s dispersion and dispersion-retaining ability were investigated by Gel permeation chromatography (GPC) and test of the fluidity of cement pastes. The results showed that the dosage of SMAS was inversely proportional to the molecular weight of polycarboxylate, and a cubic equation relationship existed between the molecular weight of the polycarboxylate and the reciprocal of SMAS dosage. There was an optimum middle dosage of sodium methylacrysulfonate which could control the molecular weight polycarboxylate, and then affect its dispersion and dispersion maintain performance. The effect of sodium methylacrysulfonate on the monomer conversion rate was also systematically discussed by means of high performance liquid chromatography (HPLC).

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 91-96
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.91
• Online since: July 2014
• Authors: Long Xiong*, Guang Jun Zheng, Yao Bi, Cheng Fei Fu, Shao Feng Wang
• Keywords: Molecular Weight, Monomer Conversion, Sodium Methylacrylsulfonate

References

[1] Houst.Y. F, Bowen. P, Perche. F, et al. Design and function of novel superplasticizers for more durable high performance concrete (superplast project) [J]. Cement and Concrete Research. 2008, 38(10): 1197-1209.

DOI: 10.1016/j.cemconres.2008.04.007

[2] Ran. Q, Somasundaran. P, Miao. C, et al. Effect of the length of the side chains of comb-like copolymer dispersants on dispersion and rheological properties of concentrated cement suspensions [J]. Journal of Colloid and Interface Science. 2009, 336(2): 624-633.

DOI: 10.1016/j.jcis.2009.04.057

[3] Bouhamed. H, Boufi. S, Magnin. A. Dispersion of alumina suspension using comb-like and diblock copolymers produced by RAFT polymerization of AMPS and MPEG [J]. Journal of Colloid and Interface Science. 2007, 312(2): 279-291.

DOI: 10.1016/j.jcis.2007.03.060

[4] Winnefeld. F, Becker. S, Pakusch. J, et al. Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems [J]. Cement and Concrete Composites. 2007, 29(4): 251-262.

DOI: 10.1016/j.cemconcomp.2006.12.006

[5] Papayianni. I, Tsohos. G, Oikonomou. N, et al. Influence of superplasticizer type and mix design parameters on the performance of them in concrete mixtures [J]. Cement and Concrete Composites. 2005, 27(2): 217-222.

DOI: 10.1016/j.cemconcomp.2004.02.010

[6] Plank. J, Dugonjić-Bilić. F, Lummer.N. R. Modification of the molar anionic charge density of acetone–formaldehyde–sulfite dispersant to improve adsorption behavior and effectiveness in the presence of CaAMPS®-co-NNDMA cement fluid loss polymer [J]. Journal of Applied Polymer Science. 2008, 111(4): 2018-(2024).

DOI: 10.1002/app.29261

[7] Yamada. K, Takahashi. T, Hanehara. S, et al. Effects of the chemical structure on the properties of polycarboxylate-type superplasticizer [J]. Cement and concrete research. 2000, 30(2): 197-207.

DOI: 10.1016/s0008-8846(99)00230-6

[8] Kinoshita. M, Nawa. T, Iida. M, et al. Effect of chemical structure on fluidizing mechanism of concrete superplasticizer containing polyethylene oxide graft chains [J]. ACI SPECIAL PUBLICATIONS. 2000, 195: 163-180.

DOI: 10.14359/9911

[9] Li. S, Yu. Q, Wei. J, et al, Effects of molecular mass and its distribution on adsorption behavior of polycarboxylate water reducers, Journal of the Chinese Ceramic Society, 1 (2011) 81-83.

[10] Guo. L, Wang. S, Zhang. A, et al. Determination of residual monomers in polycarboxylate superplasticizer using high performance liquid chromatography [J]. Journal of Wuhan University of Technology-Materials Science Edition. 2011, 26(3): 439-442.

DOI: 10.1007/s11595-011-0245-x