A Study on Structural Properties of Polyimide Fibers

• Main Authors: CHUANG, YUNGCHU, 莊詠竹
• Other Authors: Yao-Yi Cheng
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/gdbwzu

碩士 === 國立臺北科技大學 === 有機高分子研究所 === 105 === In this study, the effects of different structure of polyimide on the fiber properties were investigated. First, ODOA and FDA were used to synthesize OF powder, while BDPA and BAPP were used to synthesize BB powder. Polyimide powder were dissolved in NMP and used in dry-wet spinning process, then thermal extension was applied to obtain final fiber product. The basic properties of polyimide were identified by Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric analyzer (TGA) and Differential Scanning Calorimetry (DSC). The characteristics of those two kinds fiber were analyzed and compared by dynamic mechanical analyzer (DMA) and X - ray diffraction analysis (XRD) We choose the fiber which has linear structure and low three dimensional barriers, because the molecular chain can be easily straightened and dense packed. In other hand, the small diameter of the fiber improves the mechanical properties and modulus of the fiber.