摘要： 采用可逆加成 －断裂链转移自由基（RAFT）乳液聚合方法，制得聚甲基丙烯酸烯丙酯（P-AMA）和聚甲基丙烯酸缩水甘油酯（P-GMA）RAFT乳液，并将 2种乳液按比例与巯基封端的聚氨酯水分散体（PU-SH）混合成膜，得到具有最佳涂膜性能的杂化涂料配方。采用傅里叶变换红外光谱仪（FT-IR）对乳液及涂膜的结构进行表征，用差示扫描量热仪（DSC）等仪器对涂膜的性能进行研究，结果表明：水性杂化体系中的巯基与烯丙基在紫外光照的条件下发生巯基 －烯丙基点击反应，与环氧基在受热的条件下发生了环氧开环反应。杂化涂料在经光／热双重固化后涂膜的吸水率为 30%、凝胶量为 99%、耐溶剂（丁酮）擦试为 330次、铅笔硬度为 5H、耐冲击性为 50cm。
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RAFT乳液聚合；杂化；巯基点击反应；水性涂料
Abstract: Polyallylmethacrylate emulsion(p-AMA) and polyglycidylmethacrylate emulsion(P-GMA) were prepared by reversible addition-fragmentation chain transfer radical(RAFT)emulsion polymerization.A waterborne hybrid coating formula was obtained by blend of P-AMA and P-GMA at an optimized ratio and thiol-terminated polyurethane water dispersion(PU-SH). The structures of emulsion and films were charactered by FT-IR. The properties of the films were tested by differential scanning calorimeter(DSC)and other instruments. It was indicated that thiol -allyl click reaction and epoxy ring opening reaction were perlormed in the presence of UV or heat under UW/hot dual curing conditions. The cured hybrids films showed good properties, gel content 99%, solvent-resistance( MEK rub)330 times, pencil hardness 5H,and impact strength 50 cm, respectively.
Key words:
RAFT emulsion polymerization,
hybrids,
thiol based click reaction,
waterbome coatings
付长清１, ２, 陈 樟２, 刘海波２, 陈义旺１, 申 亮２. 巯基 ／烯丙基 ／环氧水性杂化涂料的制备与性能[J]. 涂料工业, 2012, 42(5): 28-31.
Fu Changqing, Chen Zhang, Liu Haibo, Chen Yiwang, Shen Liang. Preparation and Properties of Hybrids Waterborne Coating Containing Thiol/Allyl/Epoxy Groups[J]. Paint & Coatings Industry, 2012, 42(5): 28-31.