Solubility measurements of N 2  and CO 2  in polypropylene and ethene/octene copolymer | Zendy

Li G. | Zendy; Gunkel F. | Zendy; Wang J. | Zendy; Park C. B. | Zendy; Altstädt V. | Zendy

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Solubility measurements of N 2 and CO 2 in polypropylene and ethene/octene copolymer

Author(s) -

Li G.,

Gunkel F.,

Wang J.,

Park C. B.,

Altstädt V.

Publication year - 2006

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.25163

Subject(s) - copolymer , polypropylene , solubility , octene , polymer , polymer chemistry , materials science , context (archaeology) , volume (thermodynamics) , thermodynamics , chemistry , composite material , physics , paleontology , biology

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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