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The impact of interfaces in laminated packaging on transport of carboxylic acids

Artikel i vetenskaplig tidskrift
Författare Sofie Gårdebjer
Tobias Gebäck
Markus Andersson Trojer
E. Fratini
P. Baglioni
Romain Bordes
Anna Viridén
M. Nicholas
Niklas Lorén
Anette Larsson
Publicerad i Journal of Membrane Science
Volym 518
Sidor 305-312
ISSN 0376-7388
Publiceringsår 2016
Publicerad vid Institutionen för matematiska vetenskaper, matematik
Sidor 305-312
Språk en
Länkar dx.doi.org/10.1016/j.memsci.2016.06...
Ämnesord Permeability, Laminates, Interfaces, Polymers, Packaging, barrier properties, molecular-weight, permeability, polyethylene, polypropylene, films, copolymers, vapors, issues, gases, Engineering, Polymer Science
Ämneskategorier Kemi

Sammanfattning

The permeability of oleic and acetic acid through low density polyethylene (LDPE) and ethylene acrylic acid (EAA) have been measured using diffusion cells. In addition, the permeability through combinations of LDPE and EAA in the form of laminates with different numbers of layers has been determined. Oleic acid shows an almost 30 times higher permeability compared to acetic acid, which was partly explained by the adsorption of oleic acid to the film surface during the permeability experiment. In addition, the permeability is lower for both oleic and acetic acid in the laminates compared to the pure films. The decreased permeability can be explained by the presence of crystalline domains close to the interface. This is supported by SAXS data which suggests an ordering of polymer chains in the EAA film close to the interface. In summary, the results show that it is possible to create barrier materials with decreased permeability, which is interesting for example in the packaging industry. (C) 2016 Elsevier B.V. All rights reserved.

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