Low-rate dynamic contact angles on poly( n -butyl methacrylate) and the determination of solid surface tensions
| Autor: | R. Wu, C. N. C. Lam, D. Y. Kwok, A. Leung, A. W. Neumann, A. Li |
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| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Tension (physics) Rotational symmetry Thermodynamics Polymer Methacrylate Dynamic contact Surface tension Contact angle Colloid and Surface Chemistry chemistry Polymer chemistry Materials Chemistry Polar Physical and Theoretical Chemistry |
| Zdroj: | Colloid & Polymer Science. 276:459-469 |
| ISSN: | 1435-1536 0303-402X |
| DOI: | 10.1007/s003960050267 |
| Popis: | Low-rate dynamic contact angles of 22 liquids on a poly(n-butyl methacrylate) (PnBMA) polymer are measured by an automated axisymmetric drop shape analysis-profile (ADSA-P). It is found that 16 liquids yielded non-constant contact angles, and/or dissolved the polymer on contact. From the experimental contact angles of the remaining 6 liquids, it is found that the liquid–vapor surface tension times cosine of the contact angle changes smoothly with the liquid–vapor surface tension, i.e. γlv cos θ depends only on γlv for a given solid surface (or solid surface tension). This contact angle pattern is in harmony with those from other inert and non-inert (polar and non-polar) surfaces [34–37, 45–47]. The solid–vapor surface tension calculated from the equation-of-state approach for solid-liquid interfacial tensions [14] is found to be 28.8 mJ/m2, with a 95% confidence limit of ±0.5 mJ/m2, from the experimental contact angles of the 6 liquids. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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