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Preparation, structure, and properties of two‐phase co‐continuous polymer blends
Author(s) -
Miles Isabel S.,
Zurek Andrew
Publication year - 1988
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.760281205
Subject(s) - polybutadiene , materials science , polystyrene , polymer , polymer blend , volume fraction , methyl methacrylate , mixing (physics) , phase (matter) , polymer chemistry , natural rubber , phase inversion , composite material , methacrylate , shear rate , viscosity , thermodynamics , chemical engineering , polymer science , copolymer , chemistry , organic chemistry , quantum mechanics , membrane , engineering , biochemistry , physics
Phase continuity has been explored as a function of composition for three two‐phase polymer blends produced by mixing in the melt: polystyrene/poly(methyl methacrylate), polystyrene/cis‐polybutadiene, and poly(methyl methacrylate)/ethylene‐propylene rubber. The condition for dual phase continuity Is the application of shear close to phase inversion and this can be predicted fairly accurately using the relation\documentclass{article}\pagestyle{empty}\begin{document}$$ \frac{{\eta _1 (\mathop {\gamma)}\limits^.}}{{\eta _2 (\mathop {\gamma)}\limits^.}}\sim\frac{{\varphi _1}}{{\varphi _2}} $$\end{document}where 1 and 2 are the blend components, η is viscosity, \documentclass{article}\pagestyle{empty}\begin{document}$\mathop \gamma \limits^.$\end{document} is the shear rate in the mixing device used to produce the blend and ϕ is volume fraction. The co‐continuous materials, which we call Interpenetrating polymer blends (IPBs) are non‐equilibrium structures and are subject to disruption by changes in flow regime.