先以亚麻油(L.O.)、三羟甲基丙烷(TMP)、邻苯二甲酸酐(PA)为主要原料,采用醇解法合成了端羟基醇酸树脂预聚物,再与甲苯二异氰酸酯(TDI)、二羟甲基丙酸(DMPA)等原料反应合成了TDI改性的水性醇酸树脂分散体(WAR).探讨了醇酸树脂预聚物的油度、酸值、DMPA含量、R值[n(-NCO)/n(-OH)]等因素对分散体的外观、黏度、粒径及涂膜的硬度、柔韧性、光泽等性能的影响.采用傅里叶变换红外光谱仪(FT-IR)表征了产物的结构.采用热重分析(TG)研究了R值对涂膜耐热性的影响.研究结果表明:当水性醇酸树脂的油度为40％ ～ 45％,酸值为7～10 mgKOH/g,DMPA含量为7％,R值为1.4时,所得涂膜的硬度、光泽、稳定性等性能最佳.
参考文献
| [1] | 洪啸吟,冯汉保.涂料化学[M].2版.北京:科学出版社,1997:178-179.,1997. |
| [2] | 瞿金清,文秀芳,杨卓如,陈焕钦.水溶性醇酸树脂涂料的进展[J].化学工业与工程,2001(06):372-377,389. |
| [3] | YILGOR E,YILGOR I,YURTSEVER E .Hydrogen bonding and polyurethane morphology I.quantum mechanical calculations of hydrogen bond energies and vibrational spectroscopy of model compounds[J].Polymer,2002,43 |
| [4] | SHEN D Y,POLLACK S K,HSU S L .Far-infrared study of hydrogen-bonding in a semicrystalline polyurethane[J].Macromolecules,1989,22 |
| [5] | 何桂兰.TDI改性醇酸树脂及快干醇酸漆的制备[J].现代涂料与涂装,2002(03):5-8. |
| [6] | 瞿金清,陈焕钦.蓖麻油水性聚氨酯树脂的合成与性能的研究[J].林产化学与工业,2004(03):78-82. |
| [7] | 熊军,孙芳,杜洪光.丙酮-二正丁胺滴定法测定聚氨酯中的异氰酸酯基[J].分析试验室,2007(08):73-76. |
| [8] | 王久芬.高分子化学[M].哈尔滨:哈尔滨工业大学出版社,2004.,2004. |
| [9] | 胡乔生,叶家波,范小林,张熊禄.水溶性醇酸树脂涂料的研究进展[J].赣南师范学院学报,2005(06):54-57. |
| [10] | CHIN T,WANG Y J.The effect of DMPA units on ionic conductivity of PEG-DMPA-IPDI waterborne polyurethane as single-ion electrolytes[J].Polymer,1999 (40):3979-3988.,1999. |
| [11] | GAJEWSKI V .Chemical degradation of polyurethane[J].Rubber World,1990,202(6):15-18.,1990. |
| [12] | ZHANG Y,SHANG S,ZHANG X,et al .Influence of the composition of rosin-based rigid polyurethane foams on theirthermal stability[J].Journal of Applied PolymerScience,1996,59(7):1167-1171.,1996. |
| [13] | SARKAR S,ADHIKARI B .Thermal stability of lignin-hydroxy-terminated polybutadiene copolyurethanes[J].Polymer Degrad Stabil,2001,73(1):169-175.,2001. |
| [14] | FABRIS H J.Thermal and oxidative stability of urethanes[M].Westport:Technomic,1976.89-111.,1976. |
| [15] | LI Y G,GAO T,LIU J,et al .Multiphase structure of a segmented polyurethane:effects of temperature and ammealing[J].Macromolecules,1992,25(26):7365-7362.,1992. |
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