Synthesis, Cement Paste Fluidities and Molecular Weight Measurements of Polycarboxylate Superplasticizer by Bulk Polymerization

Abstract:

The synthesis process of polycarboxylate superplasticizer (PCE) by bulk polymerization was investigated. Compared with BPO as initiator, PCE prepared by using AIBN as initiator exhibited better cement paste fluidities. PCE using isopentenyl polyethylene glycol (TPEG) or isobutenyl polyethylene glycol (IPEG) as macromonomer showed excellent fluidities and retaining properties at 80°C and 75°C, respectively. The fumaric acid was more suitable to copolymerize as the third monomer than maleic anhydride. The molecular weight measurements showed that the characteristics of molecular weight and its distribution for all the synthesized samples were in accordance with their cement paste fluidities. The solid-state PCEs can be conveniently dissolved into water to prepare PCE solution with arbitrary concentration, and still with good cement application performances.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 2778-2781
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.2778
• Online since: September 2013
• Authors: Xiao Liu, Zi Ming Wang, Xu Liang, Jie Zhu, Jue Zhao
• Keywords: Bulk Polymerization, Cement, Fluidity, Molecular Weight, Polycarboxylate Superplasticizer (PCE)

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