Low-rate Dynamic Contact Angles on Poly(methyl methacrylate/n-butyl methacrylate) and the Determination of Solid Surface Tensions
| Autor: | D. Y. Kwok, C. N. C. Lam, A. Li, A. W. Neumann |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Yield (engineering)
Materials science Tension (physics) Analytical chemistry Surfaces and Interfaces General Chemistry Methacrylate Poly(methyl methacrylate) Surfaces Coatings and Films Contact angle Surface tension chemistry.chemical_compound chemistry Mechanics of Materials visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Wetting Methyl methacrylate |
| Zdroj: | The Journal of Adhesion. 68:229-255 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218469808029256 |
| Popis: | Low-rate dynamic contact angles of 12 liquids on a poly(methyl methacrylate/n-butyl methacrylate) P(MMA/nBMA) copolymer are measured by an automated axisymmetric drop shape analysis-profile (ADSA-P). It is found that 6 liquids yield non-constant contact angles, and/or dissolve the polymer on contact. From the experimental contact angles of the remaining 6 liquids, it is found that the liquid- vapour surface tension times the cosine of the contact angle changes smoothly with the liquid-vapour surface tension, i.e., γiv cos θ depends only on γiv for a given solid surface (or solid surface tension). This contact angle pattern is in harmony with those from other inert and noninert (polar and non-polar) surfaces [34-42, 51 -53]. The solid-vapour surface tension calculated from the equation-of-state approach for solid -liquid interfacial tensions [14] is found to be 34.4 mJ/m2, with a 95% confidence limit of \pm 0.8mJ/m2, from the experimental contact angles of the 6 liquids. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|