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Morphology and gas barrier properties of thin SiOxcoatings on polycarbonate: Correlations with plasma-enhanced chemical vapor deposition conditions

Published online by Cambridge University Press:  31 January 2011

Ahmet G. Erlat ,
Bo-Chy Wang ,
Richard J. Spontak ,
Yelena Tropsha ,
Kevin D. Mar ,
David B. Montgomery  and
Erwin A. Vogler
Ahmet G. Erlat
Affiliation:
Departments of Materials Science & Engineering and Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695
Bo-Chy Wang
Affiliation:
Departments of Materials Science & Engineering and Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695
Richard J. Spontak*
Affiliation:
Departments of Materials Science & Engineering and Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695
Yelena Tropsha
Affiliation:
Polymer Science & Technology Department, Becton Dickinson Technologies, Research Triangle Park, North Carolina 27709
Kevin D. Mar
Affiliation:
Polymer Science & Technology Department, Becton Dickinson Technologies, Research Triangle Park, North Carolina 27709
David B. Montgomery
Affiliation:
Polymer Science & Technology Department, Becton Dickinson Technologies, Research Triangle Park, North Carolina 27709
Erwin A. Vogler
Affiliation:
Polymer Science & Technology Department, Becton Dickinson Technologies, Research Triangle Park, North Carolina 27709
*
a)Address all correspondence to this author. e-mail: rich_spontak@ncsu.edu
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Abstract

Plasma-enhanced chemical vapor deposition of SiOx coatings on thermoplastics provides a viable route for production of transparent composite materials with high fracture toughness and high gas barrier properties, which are important considerations in the food packaging and biomedical device industries. By examining several series of systematically varied SiOx/polycarbonate composites, we have identified design correlations between coating characteristics (thickness, density, surface roughness, and O2 transmission) and deposition conditions (time, power, pressure, and flow rates). Of particular interest is the observation that the thermal activation energy for O2 permeation through these composites increases (by up to 17 kJ/mol) as their barrier efficacy increases.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 3 , March 2000 , pp. 704 - 717
Copyright
Copyright © Materials Research Society 2000

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