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Effects of ionizing radiation in ethylene-vinyl alcohol copolymers and in composites containing microfibrillated cellulose
RISE., STFI-Packforsk.
2008 (Engelska)Ingår i: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 109, nr 1, s. 126-134Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study reports on the effect of gamma radiation on morphological, thermal, and water barrier properties of pure ethylene vinyl alcohol copolymers (EVOH29 and EVOH44) and its biocomposites with the nanofiller microfibrillated cellulose (2 wt%). Added microfibrillated cellulose (MFC) preserved the transparency of EVOH films but led to a decrease in water barrier properties. Gamma irradiation at low (30 kGy) and high doses (60 kGy) caused some irreversible changes in the phase morphology of EVOH29 and EVOH44 copolymers that could be associated to crosslinking and other chemical alterations. Additionally, the EVOH copolymers and the EVOH composites reduced the number of hygroscopic hydroxyl functionalities during the irradiation processing and novel carbonyl based chemistry was, in turn, detected. As a result of the above alterations, the water barrier properties of both neat materials and composites irradiated at low doses were notably enhanced, counteracting the detrimental effect on water barrier of adding MFC to the EVOH matrix. © 2008 Wiley Periodicals, Inc.

Ort, förlag, år, upplaga, sidor
2008. Vol. 109, nr 1, s. 126-134
Nyckelord [en]
EVOH composites, Irradiation, Microfibrillated cellulose, Water barrier
Nationell ämneskategori
Nanoteknik Kompositmaterial och -teknik
Identifikatorer
URN: urn:nbn:se:ri:diva-29693DOI: 10.1002/app.27709Scopus ID: 2-s2.0-55849122670OAI: oai:DiVA.org:ri-29693DiVA, id: diva2:1105002
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Tillgänglig från: 2017-06-02 Skapad: 2017-06-02 Senast uppdaterad: 2017-06-09Bibliografiskt granskad

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