中文摘要：

以均苯二酐和二苯醚二胺为原料合成聚酰胺酸溶液,通过静电纺丝法制得聚酰胺酸纳米纤维膜.利用原位红外技术研究亚胺化进程,并以优化的条件制得聚酰亚胺纳米纤维膜.研究结果表明,当升温速率为2℃/min时,在350℃可实现100%亚胺化;升温速率过快,纳米纤维膜的亚胺化程度较低;采用快速-慢速相结合的升温方法,则可以有效地提高亚胺化效率.

英文摘要：

Polyamic acid （PAA） solution based on 4,4＇-diaminodiphenyl ether （ODA） and pyromelliticdianhydride（PMDA） was prepared and electrospun into PAA nanofiber films. In-situ Fourier transform infrared （FrlR） spectroscopy was used to study the progress of imidization. Through applying the optimized condition of imidization, a polyimide film was obtained with 100% of imidization degree. The results show that lower heating rate（2 ℃/min） leads to a 100% of imidization degree; PAA nanofiber films exhibited lower imidization degree under the faster rate. A new fast-slow heating rate method can improve the imidization efficiency.