Preparation and properties of fluorinated PBO with high thermal stability and low dielectric constant
A series of novel fluorinated benzoxazole polymers (6FPBO) with high thermal stability and low dielectric constant were synthesized by copolymerization of l,3-diamino-4, 6-dihydroxybenzene dihydrochloride (DAR), purified terephthalic acid (PTA) and various amount of 44(hexafluoroisopropylidene) bis(benzoic acid) ( BIS-BAF) in the medium of polyphosphoric acid (PPA). 6FPBO fibers were then obtained via dry-jet wet-spinning technique and characterized by Fourier transform infrared (FTIR) spectra, thermogravimetric analysis (TGA), and broadband dielectric spectrometer. FTIR spectrum of 6FPBO fibers indicated that the fluorine groups were incorporated into PBO molecular chains successfully. TGA curves revealed that 6FPBO fibers possessed high thermal stability just as pure PBO fibers. Moreover, dielectric constant spectrum of 6FPBO exhibited that the polymers had low dielectric constant, especially in the range of high-frequency.
Fluoropolymers 6FPBO fibers Thermal stability Dielectric properties
Tao Zhang Junhong Jin Shenglin Yang Guang Li Jianming Jiang
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
国际会议
上海
英文
306-309
2009-05-27（万方平台首次上网日期，不代表论文的发表时间）