Gas permeability and mechanical properties of polystyrene-polypropylene blends

Permeability to water vapor and oxygen, elastic modulus, tensile strength, and impact strength of polystyrene–polypropylene and high‐impact polystyrene–polypropylene blends were determined as functions of blend composition and morphology. Three types of styrene–butadiene block copolymers were tested...

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Bibliographic Details
Published in:Journal of applied polymer science 1998-09, Vol.69 (13), p.2615-2623
Main Authors: Horák, Zdeněk, Kolařík, Jan, Šípek, Milan, Hynek, Vladimír, Večerka, Frantiśek
Format: Article
Language:English
Subjects:
Applied sciences
blends
equivalent model
Exact sciences and technology
Mechanical properties
modulus
Organic polymers
permeability
Physicochemistry of polymers
polypropylene
polystyrene
Properties and characterization
strength
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Summary:Permeability to water vapor and oxygen, elastic modulus, tensile strength, and impact strength of polystyrene–polypropylene and high‐impact polystyrene–polypropylene blends were determined as functions of blend composition and morphology. Three types of styrene–butadiene block copolymers were tested as compatibilizers and found to improve mechanical properties of blends. The experimental data on permeability and modulus were compared with the predictions for the studied binary and ternary blends. The predictive scheme employs a two‐parameter equivalent box model and the data on phase continuity of constituents calculated using general equations derived from percolation theory. Blends with decreased permeability and plausible mechanical properties were proposed with regard to intended applications in food packaging. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 69: 2615–2623, 1998
ISSN:0021-8995
1097-4628
DOI:10.1002/(SICI)1097-4628(19980926)69:13<2615::AID-APP12>3.0.CO;2-T