New phosphazene-based chain extenders containing allyl and epoxide groups
- Authors: Bertani, R.; Boscolo-Boscoletto, A.; Dintcheva, N.; Ghedini, E.; Gleria, M.; La Mantia, F.; Pace, G.; Pannocchia, P.; Sassi, A.; Scaffaro, R.; Venzo, A.
- Publication year: 2012
- Type: Articolo in rivista (Articolo in rivista)
- OA Link: http://hdl.handle.net/10447/296223
Abstract
In this paper we present the synthesis and the characterization of cyclophosphazenes substituted with allyl groups, their transformation in epoxide-containing cyclophosphazenes and the final utilization of these compounds as chain extenders in combination with polyamides. The reaction at high temperature of Nylon-6 with epoxy-functionalized cyclophosphazenes leads to the opening of the epoxy units by the action of both amino (-NH2) and carboxylic (-COOH) end-groups of the polymer to enhance the final molecular weight of this material. The consequences of this fact on the thermal, mechanical and visco-elastic properties of treated Nylon-6 have been also evaluated and compared to those of the pristine material. Possible utilization of these cyclophosphazenes in recycling processes for degraded polyamides could be envisaged.