Effects of High Temperature Treatment on the Microstructure of Poly(phenylene sulfide) Film

초록

Effects of the heat treatment at 220 degrees C for up to 17 days on the microstructure of poly(phenylene sulfide) (PPS) films prepared by melt compression of virgin PPS resins of high linearity were analyzed by using color difference analyzer, X-ray photoelectron spectroscope (XPS), FTIR spectrometer, difference scanning calorimeter, and X-ray diffractometer. As the heat treatment time increased, the color of the PPS film gradually turned brown and the color difference between heat-treated and untreated sample increased. XPS and FTIR analysis confirmed that heat treatment caused thermal oxidation, followed by cross-linking of the PPS chains. The heat treatment moved the first melting temperature during the first DSC heating scan to a higher temperature while the second melting temperature remained almost constant. However, the melt crystallization temperature during the cooling scan was lowered by heat treatment. Although the heat of melting increased and the heat of melt crystallization decreased with the heat-treatment time, the crystal structure of PPS was not affected by the heat treatment.

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