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Melt rheological properties of polypropylene–maleated polypropylene blends. I. Steady flow by capillary
Author(s) -
Li Shucai,
Järvelä Pentti K.,
Järvelä Pirkko A.
Publication year - 1999
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/(sici)1097-4628(19990307)71:10<1641::aid-app11>3.0.co;2-a
Subject(s) - polypropylene , maleic anhydride , rheology , materials science , die swell , shear rate , melt flow index , shear thinning , composite material , viscosity , capillary action , polymer blend , polymer chemistry , tacticity , apparent viscosity , copolymer , polymer , extrusion , polymerization
Melt rheological properties of blends of polypropylene (PP) and PP grafted with maleic anhydride (PP‐ g ‐MA) are studied using a capillary rheometer. A pseudoplastic flow behavior is observed. The pseudoplasticity of the melt reduces with an increase of PP‐ g ‐MA content and/or temperature. The PP‐ g ‐MA component in the blend acts as decreasing melt viscosity, especially in the lower shear rate region, while the addition of PP‐ g ‐MA to PP does not cause obvious increase of die swell ratio. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1641–1648, 1999