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

被引：2

作者：

Wu, Jianbing ^{[1
,2
]}

Ma, Guozhang ^{[2
]}

Ling, Lixia ^{[3
]}

Wang, Baojun ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Minist Educ & Shanxi Prov, Key Lab Coal Sci & Technol, Taiyuan 030024, Peoples R China

[2] Shanxi Res Inst Appl Chem, Taiyuan 030027, Peoples R China

[3] Taiyuan Univ Technol, Res Inst Special Chem, Taiyuan 030024, Peoples R China

来源：

POLYMER BULLETIN | 2016年 / 73卷 / 03期

关键词：

Hyperbranched polymer; Nanosilica; UV curing; Thiol-ene; Surface modification; SILICA NANOPARTICLES; COLLOIDAL SILICA; ENE; NANOCOMPOSITES; KINETICS; PHOTOPOLYMERIZATIONS; RUBBER;

D O I：

10.1007/s00289-015-1523-0

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

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.

引用

页码：859 / 873

页数：15

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