POLYLACTIC ACID STEREOCOMPLEX, METHOD FOR PRODUCTION THEREOF, AND NUCLEATING AGENT FOR POLYLACTIC ACID RESIN

摘要

THE POLYLACTIC ACID STEREOCOMPLEX OF THE INVENTION HAS A CRYSTAL MELTING PEAK TEMPERATURE OF 215°C OR MORE, WHEREIN THE CRYSTAL MELTING PEAK IS A SINGLE PEAK AND HAS A PEAK HALF WIDTH OF 12°C OR LESS, AND CRYSTAL MELTING ENTHALPY OF 60 J/G OR MORE AS MEASURED BY DIFFERENTIAL SCANNING CALORIMETRY. THE POLYLACTIC ACID STEREOCOMPLEX OF THE INVENTION HAS A HIGH MELTING POINT, GOOD HEAT RESISTANCES, AND A HIGH LEVEL OF MECHANICAL PROPERTIES AND CHEMICAL RESISTANCE. THE METHOD OF THE INVENTION FOR PRODUCING A POLYLACTIC ACID STEREOCOMPLEX INCLUDES CHAOTIC MIXING OF 30 TO 70 PARTS BY WEIGHT OF (A) POLY-L-LACTIC ACID AND 30 TO 70 PARTS BY WEIGHT OF (B) POLY-D-LACTIC ACID BASED ON 100 PARTS BY WEIGHT OF THE TOTAL OF (A) POLY-L-LACTIC ACID AND (B) POLY-D-LACTICACID. THE POLYLACTIC ACID STEREO COMPLEX PRODUCING METHOD OF THE INVENTION CAN PRODUCE A POLYLACTIC ACID STEREOCOMPLEX HAVING, AS MEASURED BY DIFFERRENTIAL SCANNING CALORIMETRY, A CRYSTAL MELTING PEAK TEMPERATURE OF 215°C OR MORE, WHEREIN THE CRYSTAL MELTING PEAK IS A SINGLE PEAK AND HAS A PEAK HALF WIDTH OF 12°C OR LESS, AND A CRYSTAL MELTING ENTHALPY OF 60 J/G OR MORE