The synthesis and adsorption-dispersion properties of PPEGMA-PVPA copolymers in cement paste

Shenzhen Li; Dongliang Zhou; Xin Shu; Qianping Ran; Yong Yang

doi:10.1039/d4ra01817f

The synthesis and adsorption-dispersion properties of PPEGMA-PVPA copolymers in cement paste

RSC Adv. 2024 May 15;14(22):15812-15820. doi: 10.1039/d4ra01817f. eCollection 2024 May 10.

Authors

Shenzhen Li^{1

2}, Dongliang Zhou^{1

2}, Xin Shu^{1

2}, Qianping Ran^{1

2

3}, Yong Yang^{1

2}

Affiliations

¹ State Key Laboratory of High Performance Civil Engineering Materials Nanjing 210008 China lishenzhen@cnjsjk.cn.
² Sobute New Materials Co., Ltd Nanjing 210008 China.
³ School of Materials Science and Engineering, Southeast University Nanjing 211189 China.

Abstract

This study reports the synthesis of a novel superplasticizer, poly(poly(ethylene glycol)methacrylate)-poly(vinylphosphonic acid) (PPEGMA-PVPA), containing phosphate moieties via solution radical polymerization. By adjusting the feed ratios of monomers, PPEGMA-PVPA copolymers with different phosphate group densities were obtained, and their chemical structure was characterized via FT-IR, ¹H NMR spectroscopy and ICP-OES. The results demonstrated that about 70% of the VPA monomer was polymerized. The thermostability of PPEGMA-PVPA was also determined through DSC and TGA. The adsorption-dispersion performance onto cement pastes was investigated using mini-slump test, TOC and zeta potential analysis. It was demonstrated that the adsorption capacity of PPEGMA-PVPA onto cement paste was about 1.4 times stronger than that of the reference polycarboxylate superplasticizer and exhibited excellent adsorption-dispersion performance.