One-step Synthesis of High Tg Organo-soluble Side-chain Fluorinated Polyimides Containing a Triazine-azo Chromophore

Abstract

Abstract: Aseries of fluorinated copolyimides containing a triazine azo chromophore were prepared by a one step method. The copolyimides obtained were characterized by FTIRspectra, UV-Vis spectra, DSC, TGAand the prism coupling device. The copolyimides are soluble not only in aprotic organic solvents such as Nmethyl 2 pyrrolidone(NMP), N, Ndimethyl acetamide(DMAc), N, Ndimethyl formamide(DMF), dimethylsulfoxide(DMSO), but also in low boiling point solvents such as ethyleneglycol monomethyl ether and tetrahydrofuran(THF). They are almost completely transparent at wavelengths greater than 500nm. All copolyimides possess high glass transition temperatures(T_g, 544-562 K) and are almost independent of the chromophore loading level. The 5% weight loss temperatures( T₅) of the copolyimides are more than 100 Khigher than the corresponding T_gs and this high thermal stability would ensure high temperature electric poling of the copolyimides. The in plane refractive index of a copolyimide is increased as the chromophore content is increased.

Key words: Copolyimide, Triazine azo chromophore, Fluorinated, Side chain

CLC Number:

O631

TrendMD:

PAN Xiao-Xia, SUI Yu, XU Hong-Jie, YIN Jie, LIU Yan-Gang, GAO Jian, ZHU Zi-Kang, HUANG De-Yin, WANG Zong-Guang . One-step Synthesis of High T_g Organo-soluble Side-chain Fluorinated Polyimides Containing a Triazine-azo Chromophore[J]. Chem. J. Chinese Universities, 2002, 23(7): 1433.

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One-step Synthesis of High T_g Organo-soluble Side-chain Fluorinated Polyimides Containing a Triazine-azo Chromophore

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