Phase separation studies on poly(vinylidene fluoride) and poly(methyl methacrylate) quenched blends
| Autor: | B. Vallejo, J. C. Canalda, Javier Martínez-Salazar |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Materials science
Polymers and Plastics Small-angle X-ray scattering Annealing (metallurgy) Organic Chemistry Condensed Matter Physics Poly(methyl methacrylate) Amorphous solid Condensed Matter::Soft Condensed Matter Crystal chemistry.chemical_compound Monomer chemistry Chemical engineering Phase (matter) visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Interphase |
| Zdroj: | Macromolecular Symposia. 78:95-104 |
| ISSN: | 1022-1360 |
| DOI: | 10.1002/masy.19940780110 |
| Popis: | A combined study by SAXS and DSC on quenched blends of PVDF and PMMA is presented. Attention is focused on the first stage of the phase separation process during annealing that is shown to be mainly determined by the diffusion of the PVDF molecules from the amorphous blend phase towards the crystals growth front. The experimental monomer diffusion constants at T > Tg are compared with those expected theoretically using the approximation of the fast model process and the WLF equation for the relaxation frequency of the monomer. The nature and composition of the crystal interphase are discussed in terms of the SAXS invariant for the whole system and the calorimetric data derived from the Tg transitions observed. |
| Databáze: | OpenAIRE |
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