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Interfacial thickness in bilayers of poly(phenylene oxide) and styrenic copolymers

✍ Scribed by G. D. Merfeld; A. Karim; B. Majumdar; S. K. Satija; D. R. Paul

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
188 KB
Volume
36
Category
Article
ISSN
0887-6266

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✦ Synopsis

Estimates for the thickness of the interface between poly (2,6-dimethyl-1,4phenylene oxide) (PPO) and copolymers of styrene-acrylonitrile (SAN) and styrenemaleic anhydride (SMA) based on the theory of Helfand and Tagami are compared to neutron reflectivity (NR) measurements. Good agreement is found between the NR measurements and theoretical predictions that make use of a mean field binary interaction model and previously reported binary interaction energies. The techniques outlined in this work may be used to understand relationships between the mechanical properties of multiphase polymer blends and the fundamental thermodynamics of polymer interactions.

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The compatibilization of the polymer blend polyamide 6/poly(phenylene oxide) (PA-6/PPO) system has been studied using the reactive random copolymer styrene-maleic anhydride (SMA) as a compatibilizer precursor. SMA is miscible with PPO when the MA content of SMA is not higher than 8 wt %. The anhydri