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Synthesis of polyamide 6/11 copolymers and their use as matrix polymer in wood-plastic composites

 
: Zierdt, Patrick; Mitzner, Elke; Gomoll, Andre; Theumer, Torsten; Lieske, Antje

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Journal of applied polymer science 133 (2016), Nr.46, S.11087-11094
ISSN: 0021-8995
ISSN: 1097-4628
Bundesministerium für Bildung und Forschung BMBF
Spitzencluster BioEconomy; 031A076A
Englisch
Zeitschriftenaufsatz
Fraunhofer IAP ()
Fraunhofer IMWS ()

Abstract
The goal of this study was to investigate the synthesis and the resulting thermal, rheological, and mechanical properties of polyamide 6/11 copolymers (PA 6/11) as a function of their composition and to further investigate their usability as matrix polymers for wood-plastic composites (WPC). A significant composition dependency of the melting temperature was found due to the hindered crystallization of the PA 6/11 copolymers with increasing content of the minor component. In result, the lowest melting temperature of the copolymers was measured at 120 8 C for 40 wt % of E-caprolactam (PA 6/11-40/60) by DSC analysis. Due to its low melting point and feasible mechanical properties, a copolyamide with 70 wt % of E -caprolactam (PA 6/11-70/30) was chosen as matrix material for the processing of WPC. Incorporation of 30 wt % of wood fibers into PA 6/11-70/30 caused a significant increase in tensile modulus and a decrease in tensile strength and strain at break. However, the processed WPC still showed an exceptional ductility with a strain at break of 15 to 20%.

: http://publica.fraunhofer.de/dokumente/N-421202.html