Abstract:

To investigate the structure and properties of polyester/polymer (PET-A) fiber, the structure and thermal stability of PET-A fiber were studied by means of Fourier transform infrared spectroscopy (FT-IR) , X-ray diffraction (XRD) and differential scanning calorimetry (DSC). At the same time, fiber’s tolerance under different conditions of alkali、acid、oxidizing agents and reducing agents were analyzed. Result shows that PET-A fiber is composed of polyester and polyamide two components and its crystallinity is 46.95% . The thermal stability of PET-A fiber is better, and the glass transition temperature, crystallization temperature and melting temperature are 70℃、150℃ and 233℃, respectively. The tolerance of PET-A fiber in sodium hyddroxide solution is poor and the weight loss rate of fiber more than 97% under the conditions of NaOH 80g/L, 90℃ and 60min. But PET-A fiber has better tolerance in sodium carbonate solution, hydrochloric acid, sulfuric acid, hydrogen peroxide and sodium dithionite solution. However it has poor tolerance in nitric aced solution.

Key words: polyester fiber, polyeser/ polyamide copolymer fiber, physicochemical property, tensile strength, weight loss rate