分别采用含多环氧基的山梨糖醇缩水甘油醚（GE-60）和环氧化间苯二甲胺（GA-240）交联剂对聚氨酯-丙烯酸酯复合乳液（PUA）进行改性。傅里叶红外光谱分析表明,PUA中的羧基（-COO-）和胺基（-NH2）参与了交联反应。涂膜性能测试表明,GA-240能提高胶膜的硬度和交联密度,改善涂膜的耐水性、耐溶剂性和耐污性,最佳质量比为m（GA-240）∶m（PUA）=0.003;而GE-60能增强涂膜的耐乙醇性和抗冻融性,最佳质量比m（GE-60）∶m（PUA）=0.008;热失重分析发现,GA-240可以提高涂膜的热稳定性。
Polyurethane-acrylate hybrids （PUA） were crosslinked by sorbitol glycidyl ether （GE-60） and tetraglycidyl meta-xylene diamines （GA-240）, respectively. The Fourier transform infrared spectra （FT-IR） reveal that the carboxyl and amine groups of PUA reacted with epoxy groups of GE-60 and GA-240 during the drying process of PUA. The properties of PUA film indicate that GA-240 greatly improve water-, solvent- and pollution- resistance properties due to the increase of film＇ s gel content and hardness, and the optimal mass ratio of GA-240 and PUA [ m （GA-240） ： m （PUA） ]is 0. 003; while GE-60 improves the PUA film＇s adhesion, flexibility and cold crack resistance greatly, in which the corresponding mass ratio of GE-60 and PUA [ m （GE-60） ： m （PUA） 1 is 0. 008. The thermogravimetric analysis （TGA） curves determine that both GA-240 can improve the thermal stability of PUA films.
参考文献
| [1] | 张旭东,陈焕钦.聚氨酯-丙烯酸酯复合乳液的结构与性能研究进展[J].化工进展,2004(04):380-384. |
| [2] | 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. |
| [3] | Mohammed J. Nasrullah;James A. Bahr;Christy Gallagher-Lein .Automated parallel polyurethane dispersion synthesis and characterization[J].JCT research,2009(1):1-10. |
| [4] | Shih-Chieh Wang;Po-Cheng Chen;Jen-Taut Yeh;Kan-Nan Chen .A new curing agent for self-curable system of aqueous-based PU dispersion[J].Reactive & functional polymers,2007(4):299-311. |
| [5] | 瞿金清,李佩妍,陈焕钦.甲基丙烯酸甲酯与水性聚氨酯的共聚反应[J].华南理工大学学报(自然科学版),2004(08):54-57,71. |
| [6] | 瞿金清,罗春晖,陈焕钦.水性聚氨酯-丙烯酸酯的交联改性及涂膜性能[J].华南理工大学学报（自然科学版）,2009(06):53-57. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%