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Characterization of phase morphology of polymer melts (PP/PE blends) via rheology
Author(s) -
VinczeMinya Krisztina A.,
Schausberger Alois
Publication year - 2007
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.26269
Subject(s) - materials science , polypropylene , phase (matter) , rheology , polymer , dynamic mechanical analysis , polymer blend , viscoelasticity , polymer chemistry , surface tension , copolymer , particle (ecology) , chemical engineering , composite material , thermodynamics , chemistry , organic chemistry , physics , oceanography , engineering , geology
The viscoelastic behavior of high impact polypropylene (PP) melts, a multiphase system with an isotactic PP matrix and inclusions consisting of mainly amorphous ethylene–propylene copolymer (EP), is strongly influenced by the size of small inclusions. The dynamic moduli of such two‐phase systems (reactor products) are well described by Palierne's emulsion model. For this analysis the reactor product is separated into matrix and dispersed phase via the different solubility in xylene. This analysis also provides information on the ratio interfacial tension to particle size of the dispersed phase. With morphology data (particle size) of the solidified heterophasic samples (Transmission Electron Microscopy), we estimate the interfacial tension between PP and EP copolymer via the emulsion model of Palierne and from the relaxation time spectra according to Gramespacher and Meissner. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007