采用异佛尔酮二异氰酸酯(IPDI)、聚酯二元醇(聚己二酸-1,4丁二醇酯)(PBA)为主要原料合成了环氧改性的、固体分约为50％的水性紫外光固化聚氨酯分散体(PUD).通过预聚物中聚氨酯分子末端的-NCO基团与丙烯酸羟丙酯(HPA)和季戊四醇三丙烯酸酯(PETA)上的羟基发生反应,从而引入碳碳双键,使PUD具备紫外光固化的性能.研究了水性UV分散体的碳碳双键对水性聚氨酯的拉伸强度、硬度、粒径等性能方面的影响,同时对涂膜进行动态力学性能测试(DMA)和断面结构表征(SEM).结果表明:双键含量增加,UV涂料的拉伸强度和硬度增大,分散体和涂料的其他性能基本不变；DMA测试表明随着双键含量的减小,软段的Tg(s)移向低温,硬段的Tg(h)移向高温,相分离趋于完全；SEM测试表明树脂的交联程度越大,抵抗断裂的程度也越大.
参考文献
| [1] | 金珂,贺丹丹,廖燕平.高光泽水性聚氨酯及水性木器涂料的研制[J].中国涂料,2009(05):45-48. |
| [2] | Parmar R;Patel K;Parmar J .High-performance waterborne coatings based on epoxy-acrylic-graft-copolymer-modified polyurethane dispersions[J].Polymer international,2005(2):488-494. |
| [3] | Christian Decker;Frederic Masson;Reinhold Schwalm .Dual-Curing of Waterborne Urethane-Adrylate Coatings by UV and Thermal Processing[J].Macromolecular materials and engineering,2003(1):17-28. |
| [4] | Hsieh KH.;Kuo CH.;Dai CA.;Chen WC.;Peng TC.;Ho GH. .Synthesis and kinetic studies of UV-curable urethane-acrylates[J].Journal of Applied Polymer Science,2004(5):3162-3166. |
| [5] | Jung SJ.;Cho WJ.;Ha CS.;Lee SJ. .Synthesis and properties of UV-curable waterborne unsaturated polyester for wood coating[J].Journal of Applied Polymer Science,1998(4):695-708. |
| [6] | Jung, D.H.;Kim, E.Y.;Kang, Y.S.;Kim, B.K. .High solid and high performance UV cured waterborne polyurethanes[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2010(1/3):58-63. |
| [7] | ECKERLEY S T;RUDIN A .Mechanism of formation from polymer latexes[J].Journal of Coatings Technology,1990,62(780):89-99. |
| [8] | 王柯,彭娅,王燕.硬段含量对脂肪族阴离子水性聚氨酯性能的影响[J].化工进展,2010(01):119-123. |
| [9] | 卫晓利,张发兴,肖忠良,吴晓青.高固含量低黏度聚氨酯微乳液的制备及性能研究[J].高分子学报,2009(01):28-34. |
| [10] | 魏丹,叶代勇,黄洪,陈焕钦.多重交联紫外光固化水性聚氨酯涂料[J].涂料工业,2008(05):4-7. |
| [11] | 胡津昕,孙多先,于震宇.水性聚氨酯粒径和黏度性能的研究[J].天津大学学报,2003(06):719-723. |
| [12] | 陈福泰,多英全,周贵忠,罗运军,谭惠民.异佛尔酮二异氰酸酯基聚醚聚氨酯弹性体的热行为[J].高分子材料科学与工程,2002(04):177-180. |
| [13] | HASHIMOTO T;SUKAHARA T Y;TACHIK et al.Structure and properties of tapered block polymers.4."Domain-boundary mixing" and "mixing-in-domain" effects on microdomain morphology and linear dynamic mechanical response[J].Macromolecules,1983,16(04):648-657. |
| [14] | DAWN M CRAWFORD;JOHN A ESCARSEGA .Dynamic mechanical analysis of novel polyurethane coating for military applicationsl[J].Thermochimica Acta,2000,16(12):168-171. |
| [15] | 孙东成,陈巧.含有磺酸基/羧基高固含量聚氨酯分散体的合成与表征[J].化工学报,2010(03):778-783. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%