Plasticized chitosan/polyolefin films produced by extrusion

•A masterbatch of plasticized chitosan and mPE is prepared using single-pass extrusion.•Extrusion leads to fine blend morphology and high level of chitosan plasticization.•Compatibilization with EVA allows maintaining mPE mechanical properties.•Optical properties are affected by the presence of plas...

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Bibliographic Details
Published in:Carbohydrate polymers 2015-03, Vol.117, p.177-184
Main Authors: Matet, Marie, Heuzey, Marie-Claude, Ajji, Abdellah, Sarazin, Pierre
Format: Article
Language:English
Subjects:
Chitosan - chemistry
Extrusion
Glycerol - chemistry
Mechanical Phenomena
Melt processing
Optical Phenomena
Oxygen - chemistry
Permeability
Plasticized chitosan
Plasticizers - chemistry
Polyenes - chemistry
Polymer blend
Temperature
Vinyl Compounds - chemistry
Volatilization
Water - chemistry
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Summary:•A masterbatch of plasticized chitosan and mPE is prepared using single-pass extrusion.•Extrusion leads to fine blend morphology and high level of chitosan plasticization.•Compatibilization with EVA allows maintaining mPE mechanical properties.•Optical properties are affected by the presence of plasticized chitosan.•Water vapor permeability increases in the compatibilized blend. Plasticized chitosan and polyethylene blends were produced through a single-pass extrusion process. Using a twin-screw extruder, chitosan plasticization was achieved in the presence of an acetic acid solution and glycerol, and directly mixed with metallocene polyethylene, mPE, to produce a masterbatch. Different dilutions of the masterbatch (2, 5 and 10wt% of plasticized chitosan), in the presence of ethylene vinyl acetate, EVA, were subsequently achieved in single screw film extrusion. Very small plasticized chitosan domains (number average diameter
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2014.09.058