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Article: Dissolution mechanism of polymers in high pressure--high temperature n-alkanes--application to blends separation.(Technical report)
- Article from:
- Polymer Engineering and Science
- Article date:
- March 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 Society of Plastics Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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The use of a high temperature-high pressure near critical solvent is an interesting alternative to dissolve high-molecular-weight polyolefins with alkanes. This characteristic allows their separation from the blends with other polymers. In the present work, the polymer dissolution of commercial polypropylene (PP) and polystyrene (PS) in n-alkanes at high pressure and high temperature is analyzed. The comprehension of the different polymer dissolution behaviors and solvent affinities clarifies the understanding of the mechanism of PP/PS physical blend separation under these conditions. The PP dissolution in n-pentane and n-heptane was interpreted in terms of chain ...
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