Effect of average functionality on properties of UV-curable waterborne polyurethane-acrylate

被引：118
作者：
Zhang, Tong
Wu, Wenjian [1 ]
Wang, Xiaojie
Mu, Yuping [2 ]
机构：
[1] Natl Univ Def Technol, Sect 504, Coll Aerosp & Mat Engn, Changsha 410073, Hunan, Peoples R China
[2] Changsha Univ Sci & Technol, Changsha 410073, Hunan, Peoples R China
来源：
PROGRESS IN ORGANIC COATINGS | 2010年 / 68卷 / 03期
关键词：
UV curable; Waterborne; Polyurethane-acrylate; Average functionality; DISPERSIONS; POLY(EPSILON-CAPROLACTONE); PHOTOPOLYMERIZATION; OPTIMIZATION;
D O I：
10.1016/j.porgcoat.2010.02.004
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A series of ultraviolet (UV) curable waterborne polyurethane-acrylate (WPUA) with different average functionalities were synthesized in new methods. The chemical structures of WPUA were confirmed by Fourier-transform infrared spectroscopy (FT-IR) and the effect of average functionality on properties of WPUA was systemically investigated. It was found that the average functionality had a positive effect on the water resistance and tensile strength of WPUA, to make optimal formation of WPUA molecule chains available, whereas the increasing of average functionality decreased the viscosity and extension of WPUA samples. Besides, through the investigation on the UV curing kinetics, it was found that the average functionality too high or too low was unfavorable for the increase of unsaturation conversion. The morphology and microstructure of WPUA films were also comprehensively discussed with WAXD patterns and fractured surface observed from SEM images. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：201 / 207
页数：7
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