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Flow induced deformation of dual‐phase continuity in polymer blends and alloys. Part I
Author(s) -
LyngaaeJørgensen J.,
Rasmussen K. Lunde,
Chtcherbakova E. A.,
Utracki L. A.
Publication year - 1999
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.11494
Subject(s) - materials science , dual (grammatical number) , deformation (meteorology) , flow (mathematics) , polymer , phase (matter) , composite material , mechanics , physics , art , literature , quantum mechanics
A hypothesis for formation of bi‐continuous phase structures in immiscible polymer blends is proposed. It is based on the observation that a critical volume fraction φ cr for the dual continuity of phases may be calculated considering the geometry of the dispersed phase. The knowledge of the form of discrete domains at the volume fractions φ < φ cr and the probability that two close neighbor domains will form a strongly fused connection are sufficient to calculate φ cr . Furthermore, it can be predicted that φ cr should increase with stabilization of the interface. A comparative study showed that an addition of block copolymer may narrow the volume fraction range where bi‐continuous phase structures are formed. Both annealing in the molten state and shearing history influence the measured φ cr for the formation of bi‐continuous phase structure in amorphous immiscible polymer blends.