Continuous anionic polymerization of polyamide-based thermoplastic elastomer in a counter-rotating twin screw extruder: polyesteramide triblock copolymer

摘要

Polyamide 6, polyesteramide triblock and polyetheresteramide pentablock copolymers were polymerized in a modular intermeshing counter-rotating twin screw extruder. Polyesteramide triblock and polyetheresteramide pentablock copolymers are polyamidebased thermoplastic elastomers (TPE) and had not been previously polymerized in a twin screw extruder. Characterization studies including thermal analysis, viscosity measurements, and solvent extraction clearly demonstrated that the new copolymers have two separated domains arising from the different block segments. These polymers were also melt-spum into oriented filaments from the die at the exit to the twin screw extruder.