Study on Qualitative Identification Identification of Polyphenylene Sulfide Fiber

This paper identifies polyphenylene sulfide fiber by combustion method. microscopic method. melting point method. infrared radiation spectrum method. Chemical dissolution method. The results show that: shrinkage when fiber closes to the flame, melts in the flame burning and has some black smoke, self-extinguishing after leaving the flame, has frowziness, residue is dark brown lumps; Cross section shape of polyphenylene sulfide fiber is round or approximate round, surface of polyphenylene sulfide fiber is smooth; polyphenylene sulfide fiber dissolve in boiling sulfuric acid (95%similar to 98%) and nitric acid (65 %), the color of solution is black and yellow; The melting point of polyphenylene sulfide fiber is 284 degrees C; Observe the characteristic peak of 1090.69 cm(-1) is a method to judge crystallinity of polyphenylene sulfide fiber, can effectively identify polyphenylene sulfide fiber through infrared spectra and spectral bands.