Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions mixtures: Preparation and characterization

被引：76
作者：
Yang, Zhenglong [1 ,2 ]
Wicks, Douglas A. [2 ]
Hoyle, Charles E. [2 ]
Pu, Hongting [1 ]
Yuan, Junjie [1 ]
Wan, Decheng [1 ]
Liu, Yongsheng [3 ]
机构：
[1] Tongji Univ, Coll Mat Sci & Engn, Key Lab Adv Civil Engn Mat, Inst Funct Polymer Mat, Shanghai 200092, Peoples R China
[2] Univ So Mississippi, Sch Polymers & High Performance Mat, Hattiesburg, MS 39406 USA
[3] Shanghai Univ Elect Power, Dept Math & Phys, Inst Solar Energy, Shanghai 200090, Peoples R China
来源：
POLYMER | 2009年 / 50卷 / 07期
基金：
中国国家自然科学基金;
关键词：
UV-curable; Polyurethane dispersions; Thiol-ene; HYPERBRANCHED ALIPHATIC POLYESTER; MORPHOLOGY DEVELOPMENT; CHAIN EXTENSION; WATERBORNE; PHOTOPOLYMERIZATION; NEUTRALIZATION; POLYMER;
D O I：
10.1016/j.polymer.2008.12.018
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A series of newly developed UV-curable polyurethane coatings were prepared by blending multifunctional thiol- and ene-terminated polyurethane aqueous dispersions. The composition, structure, solution stability and mechanical properties of the title coatings were characterized in detail by FT-IR, photo-DSC and DMA measurements. It was found that the resulting polyurethane coatings showed good solution stability and high photopolymerization activity even after a long time (i.e. 1 month). The incorporation of a waterborne polyurethane chain into the both multifunctional thiols and ene monomers promoted their solution stability and avoided any reaction between thiols and ene groups as a result of their high reacting activity in non-aqueous systems. UV-cured films prepared by this method were found to exhibit excellent physical properties with improvements over what can be attained directly with current UV-curable urethane-acrylate based systems. This method allows for the preparation of high performance UV-curable polyurethane aqueous coatings based on thiol-ene chemistry systems. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1717 / 1722
页数：6
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