PREPARATION OF HIGH-MODULUS POLYARYLENE SULFIDE

摘要

PURPOSE:To increase the modulus and heat-distorsion temp. of a polyarylene sulfide by irradiating the polyarylene sulfide with rays of light and thermally treating it in an oxygen-contg. atmosphere at a specified temp. CONSTITUTION:A polyarylene sulfide (molding) is irradiated with rays of light of one lux or higher for at least one sec at a temp. pref. at least 50 deg.C higher than the transition point in an oxygen-contg. atmosphere to adjust the thermal shrinkage of the irradiated polyarylene sulfide at the m.p. of an unirradiated polyarylene sulfide to 5-80%. The irradiated polyarylene sulfide is thermally treated at a temp. higher than the temp. 80 deg.C lower than the m.p., pref. at a temp. at least 10 deg.C higher than the m.p., in an oxygen-contg. atmosphere and if necessary under a specified shrinkage.