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Oxygen barrier properties of biaxially oriented polypropylene/polyvinyl alcohol blend films

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Authors

Jang, Jyongsik; Lee, Dong Kweon

Issue Date
2004
Publisher
Elsevier
Citation
Polymer 45 (2004) 1599–1607
Keywords
Polymer blendOxygen permeabilityLaminar morphology
Abstract
The biaxially oriented PP/PVA blend film was prepared and had the higher oxygen barrier property by about 130 times than that of a
biaxially oriented PP film. When the viscosity ratio ðhdðPVAÞ=hmðPPÞÞ decreased, the dispersed PVA phase was developed into platelets during
stretching process. Oxygen permeability was dependent on the number and size of PVA platelet. However, the Oxygen permeability was not
sensitively changed in above 25 wt% of PVA. To obtain excellent barrier property, the optimum amount of plasticizer and initiator was
required. A pasticizer was related to the size and degree of crystallization of PVA platelet. An initiator played the role of a compatibilizer.
The oxygen barrier was enhanced with increasing the viscosity of PP and draw ratio. The higher viscosity of PP was advantageous for
preventing the delamination of a blend film, and the moisture vapor permeability was not affected with the laminar structure. As a result, the
biaxially oriented PP/PVA blend film had the potential of substituting for the PVDC coated BOPP film.
ISSN
0032-3861
Language
English
URI
https://hdl.handle.net/10371/61919
DOI
https://doi.org/10.1016/j.polymer.2003.12.046
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