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

被引：72
作者：
Li, G.
Gunkel, F.
Wang, J.
Park, C. B. [1 ]
Altstaedt, V.
机构：
[1] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada
[2] Univ Bayreuth, D-95447 Bayreuth, Germany
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2007年 / 103卷 / 05期
关键词：
solubility; magnetic suspension balance; polypropylene; ethene/octene copolymer; Henry's constants; nitrogen; carbon dioxide;
D O I：
10.1002/app.25163
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this set of experiments a magnetic suspension balance (MSB) was employed to measure the apparent solubilities of N-2 and CO2 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 CO2 were less in the branched polymer (ethene/octene copolymer) than in the linear PP. (c) 2006 Wiley Periodicals, Inc.
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页码：2945 / 2953
页数：9
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