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A rheological study of the injection molding of styrene polymers
Author(s) -
Pezzin Giovanni
Publication year - 1963
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760030405
Subject(s) - materials science , rheometer , extrusion , rheology , capillary action , composite material , molding (decorative) , shear rate , polymer , shear (geology) , spiral (railway) , viscosity , mechanical engineering , engineering
Seventeen different samples of styrene polymers and copolymers were examined in a capillary extrusion rheometer over broad ranges of temperatures and shears. They were injection molded in a spiral mold over the same temperature range. If viscosities at constant shear stress are obtained from the rheometric data, they cannot be correlated with spiral flow results. However, if viscosities are calculated at a proper “high” shear rate, capillary data correlate will with spiral flow results at all temperatures and for all materials.