摘要
以α，ω－二氨基ｎ 烷及二苯醚３，３′，４，４′－四甲酸二酐为单体，在ＮＭＰ中及室温下进行缩聚，然后在１６０ ℃进行溶液热亚胺化６ ｈ 得到聚酰亚胺。所得到的聚酰亚胺不能溶于有机溶剂。聚酰亚胺的玻璃化转变温度随结构中－（ＣＨ２）ｎ－基团长度的增加而线性下降。这一系列聚酰亚胺具有较高的热稳定性，热降解起始温度在５００ ℃左右。
Polyimides were prepared from α,ω diaminoalkanes and diphenylether 3,3′,4,4′ tetracarboxylic acid dianhydride using a polycondensation reaction in NMP at room temperature followed by a solution thermal imidization at 160 ℃ for 6 h. The polyimides obtained were not soluble in organic solvents. The glass transition temperature decreases with the increase of the length of the (CH 2) n chains in the structure linearly. The polyimides possess high thermal stabillity. The initial thermal decomposition temperature is about 500 ℃.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第6期62-64,共3页
Polymer Materials Science & Engineering
关键词
聚酰亚胺
合成
性能
脂肪二胺
polyimide, α,ω diaminoalkane, preparation, property, diphenylether 3,3′,4,4′ tetracarboxylic acid dianhydride
