Preparation, structure, and properties of two-phase co-continuous polymer blends

Authors

  • Isabel S. Miles,

    Corresponding author
    1. Imperial Chemical Industries PLC, Corporate Colloid Science Group, The Heath, Runcorn, Cheshire, England WA7 4QE
    Current affiliation:
    1. ICI PLC, Materials Research Centre, PO Box 90, Wilton, Middlesbrough Cleveland TS6 8JE England
    • Imperial Chemical Industries PLC, Corporate Colloid Science Group, The Heath, Runcorn, Cheshire, England WA7 4QE
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  • Andrew Zurek

    1. Imperial Chemical Industries PLC, Corporate Colloid Science Group, The Heath, Runcorn, Cheshire, England WA7 4QE
    Current affiliation:
    1. 1 Lime Avenue, Frodsham Cheshire England
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Abstract

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

equation image

where 1 and 2 are the blend components, η is viscosity, equation image 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.

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