采用自乳化聚氨酯水分散体的制备方法,分别制备了含蓖麻油基和巯基的聚氨酯水分散体.将两者按一定比例复合,加入水性光引发剂,在紫外光照射下,通过水性光引发剂引发涂层中的双键及巯基进行巯基-烯点击反应,制得交联聚氨酯涂膜.采用核磁共振氢谱、红外光谱、差示扫描量热仪、热重分析等手段对水分散体及光固化涂膜的结构和性能进行了分析表征.结果表明:巯基和蓖麻油结构中的碳碳双键成功地引入到了水性聚氨酯链段中；在紫外光辐照下,巯基和不饱和双键间进行了加成反应；UV固化膜具有良好的机械性能和热稳定性:凝胶量为96.67％、胶膜吸水率为13.0％、耐冲击性大于50 cm、硬度为5H、耐溶剂(甲乙酮)拭擦次数为734次、失质量50％时的温度为375 ℃.
参考文献
| [1] | 瞿金清,陈焕钦.水性聚氨酯涂料研究进展[J].高分子材料科学与工程,2003(02):43-47. |
| [2] | 田敉,王孝科.水性光固化聚氨酯丙烯酸酯预聚体的合成及乳液的制备研究[J].新型建筑材料,2009(12):9-12. |
| [3] | 魏燕彦.水性紫外光固化聚氨酯丙烯酸酯的干燥与固化过程[J].高分子材料科学与工程,2008(03):71-74. |
| [4] | Charles E. Hoyle;Christopher N. Bowman .Thiol-Ene Click Chemistry[J].Angewandte Chemie,2010(9):1540-1573. |
| [5] | Korthals, B.;Morant-Mi?ana, M.C.;Schmid, M.;Mecking, S. .Functionalization of polymer nanoparticles by thiol-ene addition[J].Macromolecules,2010(19):8071-8078. |
| [6] | Otts DB;Heidenreich E;Urban MW .Novel waterborne UV-crosslinkable thiol-ene polyurethane dispersions: Synthesis and film formation[J].Polymer: The International Journal for the Science and Technology of Polymers,2005(19):8162-8168. |
| [7] | Yang, ZL;Wicks, DA;Yuan, JJ;Pu, HT;Liu, YS .Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions: Photopolymerization properties[J].Polymer: The International Journal for the Science and Technology of Polymers,2010(7):1572-1577. |
| [8] | Yang, ZL;Wicks, DA;Hoyle, CE;Pu, HT;Yuan, JJ;Wan, DC;Liu, YS .Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions mixtures: Preparation and characterization[J].Polymer: The International Journal for the Science and Technology of Polymers,2009(7):1717-1722. |
| [9] | Samuelsson J;Jonsson M;Brinck T;Johansson M .Thiol-ene coupling reaction of fatty acid monomers[J].Journal of Polymer Science, Part A. Polymer Chemistry,2004(24):6346-6352. |
| [10] | BLACK M;RAWLINS J W .Thiol-ene UV-curable coatings using vegetable oil macromonomers[J].European Polymer Journal,2009,45:1433-1441. |
| [11] | Desroches, M.;Caillol, S.;Lapinte, V.;Auvergne, R.;Boutevin, B. .Synthesis of biobased polyols by thiol-ene coupling from vegetable oils[J].Macromolecules,2011(8):2489-2500. |
| [12] | CHEN Z G;CHISHOLM B J;PATANI R et al.Soy-based UV-curable thiol-ene coatings[J].J Coat Technol Res,2010,7(05):603-613. |
| [13] | Grigor B. Bantchev;James A. Kenar;Girma Biresaw .Free Radical Addition of Butanethiol to Vegetable Oil Double Bonds[J].Journal of Agricultural and Food Chemistry,2009(4):1282-1290. |
| [14] | TURUNC O;MEIER M A R .Fatty acid derived monomers and related polymers via thiol ene(click) addotions[J].Macromolecular Rapid Communications,2010,31(20):1822-1826. |
| [15] | Firdaus, M.;Montero De Espinosa, L.;Meier, M.A.R. .Terpene-based renewable monomers and polymers via thiol-ene additions[J].Macromolecules,2011(18):7253-7262. |
| [16] | Gerard Lligadas;Juan C. Ronda;Marina Galia .Plant Oils as Platform Chemicals for Polyurethane Synthesis: Current State-of-the-Art[J].Biomacromolecules,2010(11):2825-2835. |
| [17] | Athawale, Vilas D.;Nimbalkar, Ramakant V. . .Waterborne Coatings Based on Renewable Oil Resources: an Overview[J].Journal of the American Oil Chemists' Society,2011(2):159-185. |
| [18] | Juan Carlos Ronda;Gerard Lligadas;Marina Galia .Vegetable oils as platform chemicals for polymer synthesis[J].European Journal of Lipid Science and Technology,2011(1):46-58. |
| [19] | González-Paz, R.J.;Lluch, C.;Lligadas, G.;Ronda, J.C.;Galià, M.;Cádiz, V. .A green approach toward oleic- and undecylenic acid-derived polyurethanes[J].Journal of Polymer Science, Part A. Polymer Chemistry,2011(11):2407-2416. |
| [20] | 付长清,陈樟,程传杰,申亮.多巯基水性EP低温固化剂的制备及性能研究[J].中国胶粘剂,2011(12):9-12. |
| [21] | 刘丹,曾少敏,姚畅,陈爱芳,徐祖顺.PCDL型超支化水性聚氨酯的合成与性能[J].应用化学,2009(09):1031-1035. |
| [22] | 鲍利红,兰云军,张淑芬.改性蓖麻油制备软段离子基聚氨酯水分散液[J].中国皮革,2009(17):27-31. |
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