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Solubility measurements of N2 and CO2 in polypropylene and ethene/octene copolymer

✍ Scribed by G. Li; F. Gunkel; J. Wang; C. B. Park; V. Altstädt

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
663 KB
Volume
103
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

In this set of experiments a magnetic suspension balance (MSB) was employed to measure the apparent solubilities of N~2~ and CO~2~ in polypropylene (PP) and ethene/octene copolymer melts, while the swollen volume predicted by the Sanchez–Lacombe (SL) equation of state (EOS) was used to account for the buoyancy effect. The swollen volume of the polymer/gas mixture, as well as the gas solubilities for both PP and the ethene/octene copolymer, are discussed. It was observed that the branched molecular structure limited the molecular movement, and therefore the volume swelling of the polymer/gas mixture. In a similar context, the solubility of both N~2~ and CO~2~ were less in the branched polymer (ethene/octene copolymer) than in the linear PP. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2945–2953, 2007

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