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EnglishThe influence of the local environment of segments on the density of vibrational states of compatible PMMA-PVDF blends was revealed from data on the specific heat capacity measured within 2-60 K. The excess heat capacity (boson peak) for PMMA-PVDF blends at Tb = 4-5 K is chiefly due to additional vibrations localized in regions with a characteristic size of 2-8 nm. Transition to the fracton excitation mode over a wide temperature range above Tb was associated with the three-dimensional scale of self-similarity in the interval from 0.3-0.5 nm (which corresponds to the length of several main-chain bonds) to 1.5-2.0 nm (of the order of the length of the statistical chain segment).
| Titolo: | The dynamics of local mobility in compatible poly(methyl methacrylate)-poly(vinylidene fluoride) blends | |
| Autori: | ||
| Data di pubblicazione: | 2003 | |
| Rivista: | ||
| Abstract: | The influence of the local environment of segments on the density of vibrational states of compatible PMMA-PVDF blends was revealed from data on the specific heat capacity measured within 2-60 K. The excess heat capacity (boson peak) for PMMA-PVDF blends at Tb = 4-5 K is chiefly due to additional vibrations localized in regions with a characteristic size of 2-8 nm. Transition to the fracton excitation mode over a wide temperature range above Tb was associated with the three-dimensional scale of self-similarity in the interval from 0.3-0.5 nm (which corresponds to the length of several main-chain bonds) to 1.5-2.0 nm (of the order of the length of the statistical chain segment). | |
| Handle: | http://hdl.handle.net/11570/1584806 | |
| Appare nelle tipologie: | 14.a.1 Articolo su rivista |
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