Investigation of Case II Diffusion Behavior. 2. Study of the Poly(methyl methacrylate)−Methyl Alcohol System by Two-Beam Microinterferometry
| Autor: | M. Sanopoulou, J. H. Petropoulos, Dimitrios Stamatialis |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Polymers and Plastics
Organic Chemistry Analytical chemistry Alcohol Activation energy Penetration (firestop) Poly(methyl methacrylate) Inorganic Chemistry chemistry.chemical_compound Laser interferometry Penetrant (mechanical electrical or structural) chemistry visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Methanol Penetration rate |
| Zdroj: | Macromolecules. 35:1021-1027 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma001409b |
| Popis: | Results are reported of an experimental investigation of penetration rate and penetrant concentration profile, in the PMMA-methyl alcohol (MA) system. Penetration of liquid MA, at 22, 30, and 40 °C, along annealed or quenched films sandwiched between glass plates, was followed microscopically, and the corresponding concentration profile was studied by two-beam microinterferometry. This experimental approach was shown to provide information not directly obtainable by sectioning followed by colored tracer microdensitometry or by laser interferometry, previously applied to the study of MA across the PMMA film. On the basis of this new experimental evidence, in conjunction with the results of the theoretical investigation reported in part 1, it proved possible to elucidate certain important, but previously obscure, aspects of case II diffusion behavior in this system. |
| Databáze: | OpenAIRE |
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