以3,3′,4,4′-联苯四酸二酐(BPDA)为原料合成了2,2′-苯硫醚-4,4′,5,5′-联苯四酸二酐,然后分别与对苯二胺和4,4′-二胺基二苯醚通过高温缩聚法制备出两种侧链含硫的新型聚酰亚胺(PI)(PI-1和PI-2).与文献报道的直接由BPDA为二酐制备的PI相比,PI-1和PI-2均表现出良好的有机可溶性.热重分析表明,PI-1和PI-2在氮气氛围下失重5%的温度分别为434,402℃；由差示扫描量热法分析得其玻璃化转变温度分别为297,286℃.%2,2'-dithiophenyl-4,4',5,5'-biphenyltetracarboxylic dianhydride was synthesized from 3,3'-4,4'-biphenyltetracarboxylic dianhydride (BPDA). Two kinds of novel polyimides(PI)(PI-l and PI-2) containing thiophenyl pendent groups were prepared through high-temperature polycondensation between the resultant dianhydride and p-phenylenediamine or 4,4'-diaminodiphenyl ether. Both the PI-1 and PI-2 exhibited superior organo-solubility in comparison with PI obtained directly from BPDA as dianhydride reported in literatures. The 5% mass loss temperature in nitrogen of PI-1 and PI-2 was 434 °C and 402 °C, respectively. Their glass transition temperature was at 297°C and 286°C, respectively
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