文献类型：期刊文献

英文题名：Development of low viscosity itaconic acid-based epoxy resins for cationic-radical hybrid UV-curable coatings with superior properties

作者：Zhuo, Guangwu[1,2] Huang, Yishuai[1,2] Zhang, Yinliang[1,2] Huang, Jingshu[2] Xu, Jinmei[3] Guo, Chuigen[1,2]

第一作者：Zhuo, Guangwu

机构：[1] Institute of Biomass Engineering, South China Agricultural University, Guangzhou, 510642, China; [2] Key Laboratory for Bio-based Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China; [3] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China

年份：2025

卷号：214

外文期刊名：Reactive and Functional Polymers

收录：EI(收录号：20252018424871);Scopus(收录号：2-s2.0-105004904322)

语种：英文

外文关键词：Brinell Hardness - Cationic polymerization - Crosslinking - Curing - Glass bonding - Tensile strength

摘要：Bio-based UV-curable coatings have gained increasing attention for their eco-friendly and renewable nature, but conventional systems are often limited by high viscosity and a single crosslinking mechanism. In this study, an itaconic acid-based epoxy resin (EIA) with low viscosity (235.8 mPa·s) and dual reactivity, including both epoxy and C[dbnd]C bonds, was synthesized via esterification. This resin was employed to construct a cationic-radical hybrid UV-curable coating system, and three different comonomers were incorporated to fine-tune the curing behavior and final performance of the coatings. The results showed that the films with glycidyl methacrylate as the comonomer achieved 98.01 % epoxy conversion, 78.70 % C[dbnd]C bond conversion, and a crosslinking density of 979.89 mol·m?3. Meanwhile, the films exhibited outstanding mechanical thermal, and physical properties, including a tensile strength of 26.5 MPa, a glass transition temperature (Tg) of 54.5 °C, minimal shrinkage (2.3 %), and high gloss (92.3°). Additionally, all UV-cured coatings showed excellent pencil hardness, adhesion, and hydrophobicity. These hybrid systems offer a novel and efficient strategy for developing high-performance UV-curable coatings that combine enhanced environmental sustainability with outstanding properties. ? 2025 Elsevier B.V.