Authors Zhang, H. ; Jakisch, L. ; Komber, H. ; Häußler, L. ; Voit, B. ; Böhme, F.
Title Novel graft copolymers with aliphatic polyether and polyester main chains
Date 19.11.2015
Number 47384
Abstract A series of new graft copolymers was synthesized by a “grafting to” approach, in the course of which the polymer backbone was build up first by a chain extension reaction of polyether or polycaprolactone diols with bis-N-acyl lactams. During the first reaction step, benzoxazinone groups were introduced into the backbone which served as grafting sites for monoamino-terminated polyamide 12 or polystyrene. Chain extension and grafting could be performed successively and with high selectivity in the melt at 180–220 °C.<br />The morphology and the thermo-mechanical behavior of the graft copolymers were strongly influenced by the type of the grafted side chains. Polymers with polyamide grafts exhibited a two phase morphology with a spherulitic superstructure in the micrometer scale. The tensile behavior of these polymers was characterized by a certain elastic component.<br />In contrast, the phase morphology of a polystyrene grafted polymer was much finer. A strong influence on the glass transitions revealed improved compatibility between the components. Pronounced strain hardening was observed during the tensile test of polystyrene grafted samples.
Publisher Polymer
Citation Polymer 79 (2015) 232-242
Tags graft copolymers coupling reactions aliphatic polyether

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