Premium
The production of rubber‐modified polystyrene. II. The significance of shear in the phase inversion
Author(s) -
Freeguard G. F.,
Karmarkar M.
Publication year - 1971
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.1971.070150709
Subject(s) - polystyrene , natural rubber , phase inversion , rheology , styrene , materials science , inversion (geology) , shear (geology) , shear rate , composite material , phase (matter) , styrene butadiene , polymer chemistry , chemistry , geology , polymer , organic chemistry , copolymer , paleontology , biochemistry , structural basin , membrane
Phase inversion of the two‐phase system consisting of a polystyrene‐in‐styrene phase distributed in a rubber‐in‐styrene phase is shown only to occur above a minimum shear rate, which is experimentally determined for a range of rubber concentrations. The conditions for agitation of the system to give a smooth and nondelayed inversion point are separated into meeting two requirements, one of which is related to mass transfer to the discontinuous phase and the other, to meeting the shear requirement; these are discussed in terms of the known rheological behavior of the system.