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Fully aromatic macrocycle-terminated polyimide: synthesis and cross-linking

机译：全芳香族大环封端的聚酰亚胺：合成和交联

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摘要

This study reported a method to prepare fully aromatic macrocycle-terminated polyimides (MC-PI). The macrocycle of aryl ether ketones was prepared from (4-amino) phenylhydroquinone and a di-fluoro monomer under pseudo high dilution condition. Novel aromatic fully MC-PI oligomers were successfully prepared by the reaction of 2,3,3',4'-biphenyltetracarboxylic diandhydride with 2,5-bis(4'-aminophenoxy)-biphenyl and sulfur-containing macrocycle of aryl ether ketone. The MC-PI oligomers were cross-linkable in the heating, and the glass transition temperatures of the polyimides increased after thermally cured. The cross-linking reaction of MC-PI could form fully aromatic thermosetting polyimide by ring-opening reaction. After cross-linking, these polyimides showed higher glass transition temperatures and excellent thermal stability.
机译：这项研究报告了一种制备完全由芳香族大环封端的聚酰亚胺（MC-PI）的方法。在拟高稀释条件下，由（4-氨基）苯基氢醌和二氟单体制备芳基醚酮的大环。通过2,3,3'，4'-联苯四甲酸二酐与2,5-双（4'-氨基苯氧基）-联苯和含芳基醚酮的含硫大环的反应成功制备了新型芳族完全MC-PI低聚物。 MC-PI低聚物在加热过程中可交联，热固化后聚酰亚胺的玻璃化转变温度升高。 MC-PI的交联反应可通过开环反应形成完全芳族的热固性聚酰亚胺。交联后，这些聚酰亚胺显示出更高的玻璃化转变温度和出色的热稳定性。

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