PMDA-ODA型聚酰亚胺纤维的热稳定性研究

Thermal stability of polyimide fiber derived from PMDA and ODA

通过干法纺丝制备了聚酰亚胺(PI)纤维,采用热失重(TGA)测试分析了其热稳定性能。TGA测试表明,均苯四甲酸酐-4,4-二氨基二苯醚(PMDA–ODA)型PI纤维500℃之前不发生分解,其热分解稳定性要优于P84纤维。并利用Kissinger和Flynn-Wall-Ozawa方法计算并比较了PI和P84纤维在空气中热氧化分解的表观活化能。

Polyimide(PI) fibers were prepared by dry-spinning technology,and thermal stability was investigated by thermalgravimetric analysis(TGA).TGA results show that PI fiber derived from PMDA-ODA possess a good the r mal stability with a degradation temperature of >500 ℃,comparing to commercial P84 fiber.The apparent activation energy of thermal oxidative degradation of PI and P84 fiber in air was calculated and compared by Kissinger method and Flynn-Wall-Ozawa method.