The rheological and physical properties of linear and branched polypropylene blends |
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| Authors: | Tara J. McCallum Marianna Kontopoulou Chul B. Park Edward B. Muliawan Savvas G. Hatzikiriakos |
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| Affiliation: | 1. Department of Chemical Engineering, Queen's University, Kingston Ontario, Canada K7L 3N6;2. Department of Mechanical and Industrial Engineering, University of Toronto, Toronto Ontario, Canada M5S 3G8;3. Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3 |
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| Abstract: | The rheological, thermal, and mechanical properties of blends consisting of a linear high melt flow rate polypropylene (PP) and two branched PPs are characterized in detail. Blends containing branched PPs display evidence of miscibility in the melt state and exhibit high melt elasticity together with significant strain hardening in extensional deformation while retaining good flow properties. Out of the two blend systems examined the blends containing linear and branched PPs with similar melt flow rates have better mechanical properties, higher crystallization temperatures, and higher crystallinities. POLYM. ENG. SCI., 47:1133–1140, 2007. © 2007 Society of Plastics Engineers |
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