传统的合成乳液,综合性能差.不使用有机溶剂,合成了高t<,g>(20.2℃)、低成膜温度(13.2℃)、力学性能较好的聚氨酯丙烯酸酯(PUA)共聚乳液,研究了n(NCO)/n(OH)、固化剂等因素对涂膜性能的影响.傅立叶红外光谱(FT-IR)证实,聚氨酯(PU)和聚丙烯酸酯(PA)发生了共聚反应.TEM和粒径分布测试表明,PUA乳液粒径为200 nm左右,分布较均匀.DSC分析表明:涂膜中PU链的硬段及PA分子链之间具有一定的相容性和共混程度.力学测试及涂膜综合性能测试显示,当n(NCO)/n(OH)为1.2～1.3,固化剂质量分数为1.2%～2.0%时,涂膜的力学性能、耐盐雾性能以及耐老化性能优异.
参考文献
| [1] | Zeno W;Wicks J;Douglas A et al.Two package waterborne urethane systems[J].Progress in Organic Coatings,2002,44:161-183. |
| [2] | Kukanja D.;Zupancic-Valant A.;Krajnc M.;Golob J. .The structure and properties of acrylic-polyurethane hybrid emulsions and comparison with physical blends[J].Journal of Applied Polymer Science,2000(1):67-80. |
| [3] | Wang C P;Chu F X.Hybrid polymer latexes:acrylic-poly-urethane mechanical properties[J].Polymers For Advanced Technologies,2005(16):139-145. |
| [4] | 游波,武利民,李丹,邹丽珺.缩聚物/加聚物复合胶乳的制备科学Ⅱ.核壳结构聚氨酯-丙烯酸酯复合乳液的合成与表征[J].高分子材料科学与工程,2003(01):84-88. |
| [5] | Li C;Sun C .Latex interpenetrating networks based on polyurethane,polyacrylate and epoxy resin[J].Progress in organic Coatings,2004,49:252-258. |
| [6] | Yan-yan Wei;Ying-wu Luo;Bao-fang Li .Polyurethane acrylate microgel synthesized by emulsion polymerization using unsaturated self-emulsified polymer[J].Colloid and polymer science,2006(10):1171-1178. |
| [7] | Pardini OR;Amalvy JI .FTIR, H-1-NMR spectra, and thermal characterization of water-based Polyurethane/Acrylic hybrids[J].Journal of Applied Polymer Science,2008(2):1207-1214. |
| [8] | Jong Y J;Young K J;In W C et al.Effect of Process Variable on Molecular Weight and Mechanical Properties of Water-based Polyurethane[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2002,196:135-143. |
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