摘要： 将不饱和脂肪酸、丙烯酸与环氧树脂酯化合成环氧酯预聚体，通过半连续自由基聚合工艺，将环氧酯预聚体、甲基丙烯酸十二氟庚酯（ DFMA）及乙烯基单体共聚，合成水性含氟杂化丙烯酸树脂。采用红外光谱仪（ FT-IR）、能谱仪（ EDS）、热重分析仪（ TGA）、差式扫描量热仪（ DSC）、凝胶渗透色谱仪（ GPC）、接触角测量仪及激光粒度仪等对分散体和胶膜进行表征。系统研究了酯化温度、环氧酯用量、 DFMA及引发剂用量对树脂性能的影响，探究了树脂交联固化机理。结果表明： DFMA可与乙烯基单体共聚生成含氟丙烯酸树脂；当 DFMA单体用量为 9%时，树脂分散体粒径小于 125 nm，且分布均匀，贮存稳定性良好，胶膜的水接触角达到 96. 5 °，附着力 0级，热失质量 10%的温度超过 336 ℃；同时胶膜耐水性、耐酸性和耐碱性得到显著提高，有效改善了常规水性丙烯酸树脂分散体的综合性能。

关键词: 丙烯酸树脂, 耐水性, 自由基聚合, 甲基丙烯酸十二氟庚酯

Abstract: Epoxy ester prepolymer was synthesized by esterification of unsaturated fatty acids，acrylic acid and epoxy resin，and copolymerized with dodecafluoroheptyl methacrylate（DFMA）and vinyl monomer by semi-continuous radical polymerization process to synthesizeaqueous fluorinated hybrid acrylic resin dispersion. The dispersion and film were characterized byFourier infrared spectrometer（FT-IR），energy dispersive spectrometer（EDS），thermogravimetry（TGA）differential scanning calorimeter（DSC）gel permeation chromatograph（GPC）contact anglemet，erandlaserparticlesizeanalyzer.The，effects of esterification temperature，e，poxyester dosage DFMA and initiator dosage on resin properties were systematically studied，and the cross-linking curing mechanism was further explored. The results showed that DFMA could copolymerize with vinyl monomer to form fluorinated acrylic resin. When the DFMAmonomer dosage was 9%，the particle size of the resin dispersion was less than 125 nm， showing uniform distribution and good storage stability. The water contact angle reached 96. 5 °，the adhesion was level 0，and the 10% thermal weight loss temperature exceeded 336 ℃ . At the same time，water resistance，acid resistance and alkali resistance of the film were significantly improved， effectively enhancing the comprehensive properties of conventional water-borne acrylic resin dispersion.

Key words: acrylic resin, water resistance, free radical polymerization, dodecafluoroheptyl, methacrylate

中图分类号: 

• TQ637. 81