Preparation and hydrophobicity failure behavior of two kinds of fluorine-containing acrylic polyurethane coatings
Two kinds of fluorine-containing acrylic copolymers were prepared with an in-situ radical polymerization fluorine modification method and a post-polymerization fluorine modification route,respectively.And a kind of common acrylic copolymer as a reference was synthesized.Acrylic polyurethane was prepared with the synthesized acrylic copolymer and trimer of hexamethylene diisocyanate curing agent.Different environments including indoor atmospheric environment,hygrothermal environment,different temperature environment,as well as xenon arc aging environment were employed to investigate the failure behavior of the coatings.Fourier transform infrared spectrum(FTIR)and 19F NMR were employed to characterize the chemical structure of the copolymer.Glass transition temperature(Tg)of the copolymer was tested by differential scanning calorimetry(DSC).Water contact angles of the coatings were monitored during the failure process.The difference in hydrophobicity of the coatings was examined.Thermostability of the coatings was explored by thermo gravimetric analysis(TGA).The elemental composition of the coating surface before and after failure experiment was analyzed by X-ray photoelectron spectrometer(XPS).The results showed that the fluorine-containing copolymers and the corresponding hydrophobic coatings were prepared as expected.Copolymer b coating from the fluorine-containing acrylic copolymer prepared with the in-situ polymerization fluorine modification route exhibited better hydrophobicity in all the above environments compared with the hydrocarbon acrylic copolymer coating(Copolymer a).Copolymer c coating prepared with the fluorine-containing acrylic copolymer via the post-polymerization fluorine modification method performed the best hydrophobicity in moderate conditions and failed fast in hostile environments.The different fluorine modification method resulted in the different failure behavior.
preparation failure behavior hydrophobicity acrylic polyurethane coating fluorine modification
Fei Yang Liqun Zhu Dongxiao Han Weiping Li Yichi Chen Xianming Wang Liang Ning
Key Laboratory of Aerospace Advanced Materials and Performance(Ministry of Education),School of Mate Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education,Sch Marine Chemical Research Institute,Qingdao,266071,China
国内会议
重庆
英文
71-91
2016-05-09（万方平台首次上网日期，不代表论文的发表时间）