SYNTHESIS OF POLYAMIDE-POLYESTERS BASE RANDOM-BLOCK TERPOLYMERS IN A TWIN SCREW EXTRUDER VIA REACTIVE EXTRUSION: PROCESS AND PROPERTIES

摘要

The synthesis of polyamide-polyester based random block copolymers were carried out in a modular co-rotating twin screw extruder via reactive extrusion process. These random block terpolymers have not been previously polymerized in a twin-screw extruder and these copolymers are very limited in open literatures. We used ω-lauryllactam, ε-caprolactam, and ε-caprolactone as monomers for synthesis of copolymers in a twin screw extruder. We also used sodium hydride as an initiator and N-acetylcaprolactam as a coinitiator. Simultaneously two lactams with initiator systems to make random copolymer and subsequently added the lactone without initiator to form a random block copolymers. All formation of random-block copolymers were studied in a twin-screw extruder as a chemical reactor. The thermal, mechanical, Theological, and structural properties of new synthesized random block copolymers were investigated and compared with homopolymers and Pebax~R (Atofina) which consist of polyamidel2-PTMEG (polytetramethyleneglycol)-polyamide 12 block copolymer. It has the properties of a thermoplastic eslastomer (TPE).