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Synthesis of a macromer, MPEGAA, used to prepare an AMPS-modified polyacrylic acid superplasticizer

  • Cementitious materials
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Abstract

A macromer, methoxypolyethylene glycol acrylate (MPEGAA), was synthesized by direct esterification using methoxypolyethylene glycol (MPEG-1200) and acrylic acid (AA) as the main materials. MPEGAA was then used to prepare a polyacrylic acid superplasticizer modified with 2-acrylamido-2-methylpropane sulfonic acid (AMPS). A single-factor test was performed to investigate the effects of the molar ratio of acid to alcohol (n(AA)/n(MPEG)), inhibitor amount, catalyst amount, temperature, and time of esterification on the synthesis of MPEGAA. The experimental results showed that the optimal esterification conditions were as follows: n(AA)/n(MPEG), 3.5:1; amount of hydroquinone (as an inhibitor), 1.2%; amount of para-toluenesulfonic acid (as a catalyst), 5.5%; reaction temperature, 95 °C; and reaction time, 6 h. The AMPS-modified polyacrylic acid superplasticizer prepared under the optimal esterification conditions enabled the achievement and maintenance of high cement dispersibility. At an admixture amount of 0.15%, the cement paste fluidity was initially as high as 300 mm, and then decreased to 315 mm after 1 h and to 290 mm after 2 h.

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Authors and Affiliations

  1. College of Civil Engineering, Liming Vocational University, Quanzhou, 362000, China

    Baofan Chen  (陈宝璠)

  2. Applied Technology Engineering Center of Fujian Provincial High Education for Practical Chemical Material, Liming Vocational University, Quanzhou, 362000, China

    Baofan Chen  (陈宝璠)

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  1. Baofan Chen  (陈宝璠)
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Correspondence to Baofan Chen  (陈宝璠).

Additional information

Funded by the Fujian Education Department (Nos. JA11329, JA12412), and the Quanzhou (Fujian) Technology Research and Development Program (No. 2010G7)

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Chen, B. Synthesis of a macromer, MPEGAA, used to prepare an AMPS-modified polyacrylic acid superplasticizer. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 1186–1190 (2013). https://doi.org/10.1007/s11595-013-0842-y

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  • DOI: https://doi.org/10.1007/s11595-013-0842-y

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