Year-end Sale % OFF 
Abstract
The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic‐lipophilic groups, long‐chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well as enhancement in the compatibility of Portland cement and so on. This paper reviewed recent developments from synthetic methods of macromonomers as the initial step of production of PCE, PCE at room and elevated temperatures, and relationships between structure and properties of PCE. Through the analysis of references, it was found that PCE synthesized at room temperature had the same performance with PCE synthesized at elevated temperature in terms of conversion rate and initial dispersion in cement but broader molecular weight distribution. Conclusively, the dispersion of PCE in cement might be explained by multiple theories rather than a single one based on development trends as discussed in this paper.
Highlights
Polycarboxylate superplasticizer (PCE) was synthesized by unsaturated monomers of carboxylic acid, alkane macromonomers of long chains, and others
The reaction of polyether was obtained by radical polymerization, using macromonomers of alkenyl polyglycol ether and other small monomers to polymerize in aqueous solution directly [4, 5]
Wang et al [43] synthesized comb-shaped PCE with methoxy poly methacrylate (MPEOMA), methacrylic acid (MAA), acrylic acid (AA), and sodium allyl sulfonate (SAS) through aqueous copolymerization initiated by ammonium persulfate
Summary
Polycarboxylate superplasticizer (PCE) was synthesized by unsaturated monomers of carboxylic acid, alkane macromonomers of long chains, and others. It was an excellent cement dispersant which would make great performance in concrete [1]. Active groups can react with the −COOH group on main chains of polycarboxylate and side chains with the -C C- double bonds can be attached to the backbone by radical polymerization. In this way, the structure and properties of polycarboxylate can be changed [6]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
