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

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• 作者：Jianbing Wu ; Guozhang Ma ; Lixia Ling ; Baojun Wang
• 关键词：Hyperbranched polymer ; Nanosilica ; UV curing ; Thiol ; ene ; Surface modification
• 刊名：Polymer Bulletin
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：73
• 期：3
• 页码：859-873
• 全文大小：849 KB
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• 作者单位：Jianbing Wu (1) (2)
  Guozhang Ma (2)
  Lixia Ling (3)
  Baojun Wang (1)
  
  1. Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan, 030024, China
  2. Shanxi Research Institute of Applied Chemistry, Taiyuan, 030027, China
  3. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, 030024, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Characterization and Evaluation Materials
  Soft Matter and Complex Fluids
  Physical Chemistry
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1436-2449

文摘

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.