文献类型：期刊文献

英文题名：Molecular-weight dependence of the dispersing efficiency for comb-shaped acrylic polymers in aqueous organic pigment systems

作者：Liu, Tingwu[1,2,3];Lou, Manzhuan[1,2];Hu, Zhenlong[1,2];Han, Jianwei[1,2];Wang, Limin[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Clariant Chem Technol Shanghai Ltd, 288 Chunde Rd, Shanghai 201108, Peoples R China

年份：2026

卷号：247

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20255219765934);WOS:【SCI-EXPANDED(收录号:WOS:001649989000001)】；

基金：This research was financially supported by the Sinopec Seeding Program (ZC0607-0869) . Support from the Fundamental Research Funds for the Central Universities (SLA13223001) was also acknowl-edged. The authors would like to express their sincere gratitude to Dr. Siyu Li for the insightful discussions.

语种：英文

外文关键词：Polymeric dispersants; Molecular weight; Waterborne system; Phthalocyanine blue; Surface properties

摘要：The molecular weight of polymeric dispersants is a critical parameter affecting their performance in pigment dispersion systems. In this study, a series of p(BzMA-co-mPEGMA) copolymers with different molecular weights were synthesized via free radical solution polymerization while maintaining a constant monomer ratio. The influence of molecular weight on their performance as pigment dispersants was systematically investigated. FTIR and DSC analyses revealed that increasing molecular weight enhanced intermolecular interactions but reduced chain mobility and crystallinity. Self-assembly studies in aqueous solution showed that higher molecular weight led to decreased critical micelle concentration and increased micellization energy. Adsorption measurements demonstrated enhanced maximum adsorption capacity and more favorable adsorption free energy on pigment surfaces with increasing molecular weight. Although molecular weight showed minimal influence on overall dispersion performance, with all samples achieving excellent stability, the copolymer with moderate molecular weight exhibited optimal results in particle size distribution, dispersion stability, and tinting strength. This systematic investigation of molecular weight effects offers guidelines for molecular design of polymeric dispersants in aqueous pigment systems.