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Materials 2014, 7(9), 6169-6183; doi:10.3390/ma7096169
Article

Preparation, Characterization and Performances of Powdered Polycarboxylate Superplasticizer with Bulk Polymerization

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Received: 28 February 2014; in revised form: 28 July 2014 / Accepted: 4 August 2014 / Published: 29 August 2014
(This article belongs to the Section Advanced Composites)
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Abstract: A polycarboxylate superplasticizer (PCE) was synthesized in a non-solvent system with bulk polymerization and then was pulverized into powdered form to achieve a rapid transportation and convenient preparation. PCE synthesized by using isopentenyl polyethylene glycol (TPEG) or isobutenyl polyethylene glycol (IPEG) as a macromonomer exhibited the best fluidities and retaining properties at 80 °C and 75 °C, respectively. Besides, azobisisobutyronitrile (AIBN) was suitable as an initiator, and the fumaric acid was suitable as the third monomer. The test results of 1H nuclear magnetic resonance (1H NMR) confirmed the occurrences of polymerization, and the measurement results of molecular weight and distribution showed that PCE molecular weight characteristics were in accordance with their fluidity properties in cement paste. The application performances in cement showed that PCEs with the best paste fluidity retentions had the longest final setting time and the shortest setting time interval, and the PCEs with good fluidity properties can obviously delay the hydration process and lower the hydration heat. Accordingly, this is a novel, energy-saving and economical method to prepare powdered PCE in the field of concrete admixtures.
Keywords: polycarboxylate; superplasticizer; powdered; fluidity; cement polycarboxylate; superplasticizer; powdered; fluidity; cement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Liu, X.; Wang, Z.; Zheng, Y.; Cui, S.; Lan, M.; Li, H.; Zhu, J.; Liang, X. Preparation, Characterization and Performances of Powdered Polycarboxylate Superplasticizer with Bulk Polymerization. Materials 2014, 7, 6169-6183.

AMA Style

Liu X, Wang Z, Zheng Y, Cui S, Lan M, Li H, Zhu J, Liang X. Preparation, Characterization and Performances of Powdered Polycarboxylate Superplasticizer with Bulk Polymerization. Materials. 2014; 7(9):6169-6183.

Chicago/Turabian Style

Liu, Xiao; Wang, Ziming; Zheng, Yunsheng; Cui, Suping; Lan, Mingzhang; Li, Huiqun; Zhu, Jie; Liang, Xu. 2014. "Preparation, Characterization and Performances of Powdered Polycarboxylate Superplasticizer with Bulk Polymerization." Materials 7, no. 9: 6169-6183.


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