POLYMERS HAVING IMPROVED PROCESSABILITY

摘要

POLY(LACTONES) ARE PROVIDED. THE POLY(LACTONES) ARE OBTAINED BY POLYMERISATION OF A LACTONE WITH AN INITIATOR SYSTEM COMRPISING AT LEAST ONE THREE OR MORE FUNCTIONAL INITIATOR. THE POLY(LACTONES) HAVE A SHEAR VISCOSITY AT SOME TEMPERATURE IN THE RANGE OF FROM 35 TO 45°C ABOVE THE MELTING TEMPERATURE OF THE POLY(LACTONE) OF AT LEAST 6 KPAS AT 0.1 S-1 SHEAR RATE AND NO GREATER THAN 3.5 KPAS AT 100S-1 SHEAR RATE, AND A SHEAR VISCOSITY ACTIVATION ENERGY OF GREATER THAN 40 KJ/MOL. PREFERABLY, THE POLY(LACTONE) IS POLY(CAPROLACTONE).