Effect of Drawing Process on Structure and Properties of Polyphenylene Sulfide Films

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