Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions: Photopolymerization properties
Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions: Photopolymerization properties
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由多官能硫醇和烯封端聚氨酯水分散体制备的新型紫外光固化聚氨酯涂料：光聚合性能
DOI：
10.1016/j.polymer.2010.02.003
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发表时间：
2010-03
期刊：
影响因子：
4.6
通讯作者：
Yuan, Junjie
中科院分区：
文献类型：
--
作者：
Pu, Hongting;Yang, Zhenglong;Wicks, Douglas A.;Liu, Yongsheng;Yuan, Junjie
提出了一种制备新型紫外光固化聚氨酯涂料的新方法，该涂料由多官能端硫醇和端烯聚氨酯水分散体组成。通过聚氨酯分散体合成和硫醇-烯化学的协同组合，开发了制备新型UV固化聚氨酯涂料的策略。采用Photo-DSC、实时FTIR、DMA和拉伸测试等方法研究了新型紫外光固化聚氨酯涂料的光聚合和力学性能。新的聚氨酯涂料具有1.5倍高的聚合速率和最终99%的官能团转化率在空气条件下相比，目前的丙烯酸酯基紫外光固化聚氨酯分散体涂料。还发现通过该方法制备的UV固化聚氨酯膜的杨氏模量和断裂拉伸强度分别增加了25%和10%。这些实验事实表明，将硫醇-烯化学引入聚氨酯分散体涂料中增加了它们的聚合速率，产生了高度的交联。这证实了目标新型UV可固化聚氨酯涂料的制备，并揭示了硫醇-烯化学结合的变化对UV可固化聚氨酯分散体涂料体系的光聚合行为的显著影响。
A novel approach toward the preparation of newly UV-curable polyurethane coatings composed of multifunctional thiol- and ene-terminated polyurethane aqueous dispersions is presented. By a synergistic combination of polyurethane dispersions synthesis and thiol-ene chemistry, strategies for the preparation of newly UV-curable polyurethane coatings are developed. Photo-DSC, real-time FTIR, DMA and tensile tests measurements are used to investigate the photopolymerization and mechanical behaviors of newly UV-curable polyurethane coatings. The newly polyurethane coatings have 1.5 times higher polymerization rate and final 99% functional groups conversion in air conditions compared to current urethane-acrylate based UV-curable polyurethane dispersions coatings. UV-cured polyurethane films prepared by this method are also found to exhibit increase in Young's modulus and tensile strength at break by 25% and 10%, respectively. These experiment facts suggest that the incorporation of thiol-ene chemistry to the polyurethane dispersion coatings increase their polymerization rate, producing a high degree of cross-linking. This confirms the preparation of the targeted novel UV-curable polyurethane coatings and reveals the dramatic effect that changes in incorporation of thiol-ene chemistry can have on the photopolymerization behaviors of UV-curable polyurethane dispersions coatings systems.
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影响因子：
2.4
作者：
Asif, A;Huang, CY;Shi, WF
通讯作者：
Shi, WF
影响因子：
6.6
作者：
Tielemans, M;Roose, P;Vanovervelt, JC
通讯作者：
Vanovervelt, JC
影响因子：
4.6
作者：
Rydholm, Amber E.;Reddy, Sirish K.;Bowman, Christopher N.
通讯作者：
Bowman, Christopher N.
影响因子：
4.6
作者：
M. Morel;J. Lacoste;M. Baba
通讯作者：
M. Morel;J. Lacoste;M. Baba
DOI：
10.1002/polb.20484
发表时间：
2005-11
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Gang Xu;Yongbin Zhao;W. Shi
通讯作者：
Gang Xu;Yongbin Zhao;W. Shi