Abstract: Polyphenylene sulfide (PPS) sheets were prepared using a HAAKE extruder and then were uniaxially-stretched into PPS film. The processing technology of uniaxially-stretched PPS films was discussed and the optimum stretching temperature was determined between 85℃~100℃. According to the analysis results of universal material testing machine, differential scanning calorimetry and X-ray diffraction tests, the impact of extrusion processing and tensile rate on the structures and mechanical properties of the uniaxially-stretched film was studied. With increasing tensile rate the orientation degree of the film increased, but the crystallinity, tensile strength and elongation at break of the film increased firstly and then decreased.

Key words: polyphenylene sulfide film, stretching velocity, orientation degree, crystallinity, mechanical property