以4,4'-二羟基二苯醚、对硝基氯苯为原料,缩合制得4,4'-二(4-硝基-苯氧基)二苯醚,后采用水合肼还原得到4,4'-二(4-氨基一苯氧基)二苯醚(BAPE)单体;将其与PMDA(均苯四甲酸二酐)通过缩聚反应、热环化制备了一种多苯氧基型聚酰亚胺.结果表明:缩合制备4,4'-二(4-硝基-苯氧基)二苯醚,收率达到99.3%以上.还原制备4,4'-二(4-氨基-苯氧基)二苯醚(BAPE)单体,熔点125.9～126.8℃,母液回用后收率达85.9%以上.此种单体制备的聚酰亚胺玻璃化转变温度达280.8℃,具有较高的耐热性能,拉伸强度达到99.67MPa,断裂伸长率为17.32%,是一种性能优良的材料.
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