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Rheology of EPR/PP blends
Author(s) -
Mighri F.,
Huneault M. A.,
Ajji A.,
Ko G. H.,
Watanabe F.
Publication year - 2001
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.2057
Subject(s) - electron paramagnetic resonance , rheology , materials science , ethylene propylene rubber , polypropylene , copolymer , polymer chemistry , viscosity , shear rate , arrhenius equation , chemistry , polymer , composite material , nuclear magnetic resonance , activation energy , physics
The rheological behavior of polypropylene, PP, ethylene‐propylene copolymer, EPR, and EPR/PP blends was studied. Zero‐shear viscosity and elastic relaxation time were determined by least‐squares fits by using a Carreau–Yasuda model with Arrhenius temperature dependency. The effect of PP and EPR molecular weight, ethylene ratio in EPR copolymer (E/EPR), and EPR concentration on the zero‐shear viscosity and elasticity of EPR/PP blends was determined experimentally. Molecular weight effects are compared to theoretically expected relationships. EPR concentration effect and E/EPR ratio effects agree well with predictions made by using the Tsenoglou model. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2113–2127, 2001