Diffusion of water-acetic acid mixtures in epoxy
| Autor: | L. Gladden, Y. Dutheillet, D. Vesely, M. Mantle |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Polymers and Plastics
Hydrogen bond Diffusion Analytical chemistry Epoxy Condensed Matter Physics Acetic acid chemistry.chemical_compound chemistry visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Solvent effects Fourier transform infrared spectroscopy Solubility Spectroscopy |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 37:3328-3336 |
| ISSN: | 1099-0488 0887-6266 |
| Popis: | The solubility and diffusion of water–acetic acid solutions in epoxy resins has been studied by nuclear magnetic resonance imaging (MRI) and spectroscopy (NMR), Fourier transform infrared (FTIR) spectroscopy, and light microscopy (LM). These techniques revealed the progression of a sharp diffusion front at a rate proportional to the square root of time. Both the swelling and rate of diffusion are dependent on acid dilution. At higher acid concentrations, hydrogen bonds were present, which has been interpreted as formation of acid dimers. The results indicate that molecular interactions play a major role in controlling the solubility and diffusion processes. The observation that voids can be filled up with penetrant strongly support the interpretation that molecular interactions rather than concentration gradient are responsible for these effects. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 3328–3336, 1999 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text