Study of Poly(trimethylene terephthalate)/Poly(hexamethylene isophthalamide) Blends

• Main Authors: Huan-Yi Lee, 李奐儀
• Other Authors: Fang-Chyou Chiu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/08363695303152278336

碩士 === 長庚大學 === 化工與材料工程研究所 === 91 === In this study, the poly(trimethylene terephthalate) (PTT)/ poly(hexamethylene isophthalamide) (PA 6I) blends were investigated through differential scanning calorimeter (DSC), polarized optical microscope (POM), wide angle x-ray diffractometer (WAXD), thermogravimetric analyzer (TGA), and scanning electron microscope (SEM). The DSC results showed that two distinct glass transition temperatures (Tg's) existed in the blends. The SEM and POM results indicated the blends exhibited two morphological features, which depended on the composition. According to these results, it was concluded that the PTT/PA 6I blend is an immiscible system. Nevertheless, the crystallization ability of PTT was evidently increased with the addition of the amorphous PA 6I while the blends were prepared at a lower temperature. The melting temperature of PTT was not affect with the composition of the blend, but it decreased with the blending temperature. The equilibrium melting temperature of neat PTT determined by Hoffman-Weeks plot was 251.5℃. The spherulite growth rate of PTT was determind with POM and it increased with increasing the PA 6I content in the blends. The WAXD results showed that the crystal structure of PTT was not affected with the addition of PA 6I. The thermal degradation temperature of the blends increased with the PA 6I content as revealed by the TGA experiments.