Grafting of hyperbranched polymer onto the nanosilica surface and their effect on the properties of UV-curable coatings

被引：0
作者：
Jianbing Wu
Guozhang Ma
Lixia Ling
Baojun Wang
机构：
[1] Taiyuan University of Technology,Key Laboratory of Coal Science and Technology
[2] Ministry of Education and Shanxi Province,Research Institute of Special Chemicals
[3] Shanxi Research Institute of Applied Chemistry,undefined
[4] Taiyuan University of Technology,undefined
来源：
Polymer Bulletin | 2016年 / 73卷
关键词：
Hyperbranched polymer; Nanosilica; UV curing; Thiol-ene; Surface modification;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The nanosilica is first treated with 3-mercaptopropyl trimethoxysilane (MPTMS) to introduce mercapto groups as growth points, and then hyperbranched polymer is grafted on the nanosilica surface via repeated step of thiol-ene click reaction between the acrylate double bond of trimethylolpropane triacrylate (TMPTA) and mercapto groups of trimethylolpropane tris 3-mercaptopropionate (Trithiol). FTIR results confirm that the grafting procedure is feasible, and TGA results indicate the grafting ratio is as high as 45.0 %. The curing kinetic, monitored by photo-DSC, shows that both terminal acrylate double bonds and mercapto groups can accelerate the curing speed of the UV-curing organic–inorganic hybrid coatings. The mechanical and physical properties of UV-curable hybrid coatings containing modified nanosilica at different generations are also investigated.
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页码：859 / 873
页数：14
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