Enhanced Copolymerization of PEN/PET Blends during Ultrasonically-Aided Extrusion
PEN, PET, and their 50/50 blend were ultrasonically extruded at various amplitudes. Rheological, thermal, mechanical, morphological and spectroscopic characterizations of the untreated and ultrasonically treated samples were carried out. Fast homopolymerization during extrusion of PET was found to occur at an ultrasonic amplitude of 7.5 |*mu*|m. In contrast, degradation of PEN was observed with ultrasonic treatment. Ultrasonic treatment at short residence time led to the enhancement of transesterification reaction in the PEN/PET blend, indicating that more copolymerization occurred during ultrasonic treatment.
Isayev, Avraam, "Enhanced Copolymerization of PEN/PET Blends during Ultrasonically-Aided Extrusion" (2009). Polymer Engineering Faculty Research. 152.