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Molecular weight dependence of interaction parameter and demixing concentration in polymer-polymer-good solvent systems. comparison with theory
The dependence of the interaction parameter χAB between two unlike polymers A and B and of their demixing concentration cK on their molecular weight is investigated. The experiments were performed by means of light scattering (spinodal and “optical theta” conditions) on two polymer pairs: polydimeth...
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Published in: | Die Makromolekulare Chemie 1987-09, Vol.188 (9), p.2223-2230 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The dependence of the interaction parameter χAB between two unlike polymers A and B and of their demixing concentration cK on their molecular weight is investigated. The experiments were performed by means of light scattering (spinodal and “optical theta” conditions) on two polymer pairs: polydimethylsiloxane‐polystyrene and polydimethylsiloxane‐poly(methyl methacrylate) in various thermodynamically good solvents. The results are in agreement with the predictions of new scaling laws (χAB ∼ M−0,46 and cK ∼ M−0,63) derived from renormalization group calculations. |
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ISSN: | 0025-116X 0025-116X |
DOI: | 10.1002/macp.1987.021880919 |