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Flow‐Induced Morphology of iPP Solidified in a Shear Device
Author(s) -
Pantani Roberto,
Balzano Luigi,
Peters Gerrit W. M.
Publication year - 2012
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201100158
Subject(s) - materials science , morphology (biology) , shear flow , shear (geology) , composite material , flow (mathematics) , mechanics , genetics , physics , biology
The morphology of molded parts is the result of a competition between deformation rate, crystallization kinetics, relaxation times, and cooling. In this work, samples are solidified isothermally, so that the differences in morphology can be ascribed only to flow, and after a step shear, so that the effect of crystallinity on flow can be neglected. The resulting morphology is characterized, so that the data can be adopted for any further analysis. A comparison is conducted among the resulting structures and an attempt is made to identify a key parameter able to justify the differences. It is found that the main morphological features can be correlated to a single rheological parameter: the maximum attained value of molecular strain during the pulse of flow.