Synthesis and Properties of Styrene-Maleic Anhydride Copolymers Prepared by RAFT Polymerization

OUYANG Xiu-wen; LUO Qiao-ling; LI Song-zhan; HE Jia-yu; DU Chang-sen; FU Shao-hai; WANG Dong

doi:10.14028/j.cnki.1003-3726.2026.25.371

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Synthesis and Properties of Styrene-Maleic Anhydride Copolymers Prepared by RAFT Polymerization

更新时间：2026-04-30

- Synthesis and Properties of Styrene-Maleic Anhydride Copolymers Prepared by RAFT Polymerization
- Polymer Bulletin Vol. 39, Issue 5, Pages: 774-782(2026)
- 作者机构：
  
  江南大学纺织科学与工程学院　无锡 214122
  广东普利特新材料有限公司　广州 511458
  苏州世名科技股份有限公司　苏州 215337
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.25.371
  CLC：
- Received：23 December 2025，
  
  Accepted：26 February 2026，
  
  Online First：17 April 2026，
  
  Published：20 May 2026
- 稿件说明：
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欧阳秀文, 罗巧玲, 李松展, 何甲宇, 杜长森, 付少海, 王冬. RAFT法合成苯乙烯–马来酸酐共聚物及其性能. 高分子通报, 2026, 39(5), 774–782.

Ouyang, X. W.; Luo, Q. L.; Li, S. Z.; He, J. Y.; Du, C. S.; Fu, S. H.; Wang, D. Synthesis and properties of styrene-maleic anhydride copolymers prepared by RAFT polymerization. Polym. Bull. (in Chinese), 2026, 39(5), 774–782.
欧阳秀文, 罗巧玲, 李松展, 何甲宇, 杜长森, 付少海, 王冬. RAFT法合成苯乙烯–马来酸酐共聚物及其性能. 高分子通报, 2026, 39(5), 774–782. DOI： 10.14028/j.cnki.1003-3726.2026.25.371.

Ouyang, X. W.; Luo, Q. L.; Li, S. Z.; He, J. Y.; Du, C. S.; Fu, S. H.; Wang, D. Synthesis and properties of styrene-maleic anhydride copolymers prepared by RAFT polymerization. Polym. Bull. (in Chinese), 2026, 39(5), 774–782. DOI： 10.14028/j.cnki.1003-3726.2026.25.371.

摘要

目前市售苯乙烯–马来酸酐共聚物(SMA)的分子量分布宽，易使颜料分散出现“分级效应”，即颜料粒径分布不均。针对传统自由基聚合法合成的SMA分子量分布宽的难题，本研究采用RAFT聚合法合成了苯乙烯–马来酸酐共聚物，探究了链转移剂和引发剂对SMA分子量及其分布的影响，利用红外光谱仪、核磁共振波谱仪和凝胶渗透色谱仪表征SMA结构特性，开展了SMA共聚物对炭黑颜料分散性能研究，并与市售SMA分散性能作对比。结果表明，采用2-苯丙-2-基苯甲二硫酸酯(PPB)作为链转移剂、偶氮二异丁腈(AIBN)作为引发剂的聚合体系，所得SMA共聚物分子量分布最窄，分子量分布系数仅为1.13；RAFT法合成的SMA共聚物呈现出交替结构；RAFT法合成的SMA共聚物被用于炭黑分散剂，其水相分散液的粒径及其分散性指数分别低至151 nm和0.109，具有优异的分散稳定性，而且其分散性能明显优于市售SMA产品。本研究明确了窄分子量分布的SMA分散剂的RAFT合成工艺的影响规律，为颜料均匀稳定分散提供理论依据和技术支撑。

Abstract

Conventionally synthesized styrene-maleic anhydride (SMA) dispersants often exhibit broad molecular weight distributions

resulting in a broad and heterogeneous particle size distribution of pigments

known as the “gradient effect”. To address this issue

in this study

SMA copolymers with controlled molecular weights were synthesized

via

reversible addition-fragmentation chain-trans

fer (RAFT) polymerization. The influence of chain transfer agents and initiators on the molecular weight and distribution of SMA was thoroughly investigated. The structures of the resulting SMA copolymers were characterized using Fourier-transform infrared (FTIR) spectroscopy

nuclear magnetic resonance (NMR) spectroscopy

and gel permeation chromatography (GPC). The dispersion performance of the SMA copolymers for carbon black pigments was evaluated and compared with that of commercial SMA dispersants. The results indicate that the polymerization system using 2-phenylpropyl 2-benzenedicarboxylate (PPB) as the chain transfer agent and AIBN as the initiator afforded SMA copolymers with the narrowest molecular weight distribution

exhibiting a remarkably low dispersity (

) of 1.13. Structural analysis confirmed that the RAFT-synthesized SMA copolymers possessed alternating structures. When used as a dispersant for carbon black

the aqueous dispersion system prepared with these RAFT-synthesized SMA copolymers achieved an ultra-fine particle size of 151 nm and an exceptionally low dispersion index of 0.109

demonstrating an outstanding dispersion stability. Its dispersing performance significantly surpassed that of the commercially available SMA dispersants.

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