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Polymers 2011, 3(4), 1734-1749; doi:10.3390/polym3041734

Effect of Compatibilization on Poly-ε-Caprolactone Grafting onto Poly(ethylene-co-vinyl alcohol)

1
Université de Lyon, F-42023, Saint Etienne, France
2
CNRS, UMR 5223, Ingénierie des Matériaux Polymères, 42023, Saint-Etienne, France
3
IMP@UJM, Université de Saint-Etienne, Jean Monnet, F-42023, Saint-Etienne, France
*
Author to whom correspondence should be addressed.
Received: 13 July 2011 / Revised: 24 August 2011 / Accepted: 6 October 2011 / Published: 11 October 2011
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Abstract

The non-miscibility of the reactants during solvent free poly-ε-caprolactone grafting onto poly(ethylene-co-vinyl alcohol) (EVOH) dramatically affects reaction kinetics. Different solutions were proposed to accelerate the exchange reactions between poly(ethylene-co-vinyl alcohol) and poly-ε-caprolactone. Reactions were conducted in a batch reactor or a mini twin-screw extruder. The addition of a poly(ethylene-co-vinyl alcohol)-g-poly-ε-caprolactone copolymer increased the compatibility of the reactants and led to a higher reaction rate. This copolymer was either prepared separately and added at the reaction beginning or prepared in situ grafting caprolactone from EVOH. The reactive system evolution was analyzed using molar mass evolution, microstructure characterization, thermal properties and the reactive blend morphology. The compatibilization effect combined with optimized reaction conditions, such as concentration and nature of catalyst and temperature, resulted in an important increase in reaction rates. Among the tested catalysts, 1,5,7-Triazabicyclo [4.4.0]dec-5-ene was a more efficient catalyst for grafting reactions than Tin (II) 2-ethylhexanoate. View Full-Text
Keywords: biodegradable polymers; compatibilization; grafting onto; dynamic exchange reaction; reactive extrusion biodegradable polymers; compatibilization; grafting onto; dynamic exchange reaction; reactive extrusion
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Touhtouh, S.; Becquart, F.; Pillon, C.; Taha, M. Effect of Compatibilization on Poly-ε-Caprolactone Grafting onto Poly(ethylene-co-vinyl alcohol). Polymers 2011, 3, 1734-1749.

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