Segregation at the Interface between a Homopolymer and a Binary Polymer Blend
- Department of Materials Science and Engineering, and Laboratory for Research on the Structure of Matter, The University of Pennsylvania, Philadelphia, Pennsylvania 19104-6272 (United States)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Low-energy forward-recoil spectrometry studies show that the interface between polystyrene ({ital A}) and a miscible blend of two poly(styrene-{ital co}-4-bromostyrene)s ({ital B}:{ital C}) has an interfacial excess of {ital B}, {ital z}{sub {ital B}}{sup *}, where {ital B} is the component with the lower bromostyrene level. At 170 {degree}C, {ital z}{sub {ital B}}{sup *} increases with the bulk volume fraction of {ital B}, {phi}{sub {ital B}{infinity}}, has a maximum near 0.25, and then decreases. These results are in qualitative agreement with self-consistent field (SCF) calculations. SCF calculations of the interfacial tension and interfacial width predict that {ital B} has an optimum compatibilizing effect for {phi}{sub {ital B}{infinity}}{similar_to}0.25.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 44885
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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