STUDY ON SYNTHESES AND PROPERTIES OF SOME NOVEL POLYIMIDES CONTAINING BISTHIAZOLE RINGS

<正> Some nove polyimides containing bisthiazole rings were prepared by reacting 2,2'-diamino-4, 4'-bisthiazole （DABT） with different aromatic dianhydride. The polyimidesobtained had inherent viscosities of 0.37--0.82 dl/g. Thermogravimetric analysis of thepolyimides showed good thermal stability the temperature at 5% weight loss being from450°to 560℃. The permeability of two polymer membranes to H2, O2 and N2 was deter-mined, respectively Three kinds of polyimide films were converted into electrical conductorby pyrolysis at high temperature in nitrogen atmosphere. The maximum room tempera-ture conductivity as high as 3.9×10～2 S/cm for PI film pyrolyzed at 1200℃ for 10min wasobtained, and it was very stable in air.