Please use this identifier to cite or link to this item:
https://olympias.lib.uoi.gr/jspui/handle/123456789/17420Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Papadopoulos, P. | en |
| dc.contributor.author | Peristeraki, D. | en |
| dc.contributor.author | Floudas, G. | en |
| dc.contributor.author | Koutalas, G. | en |
| dc.contributor.author | Hadjichristidis, N. | en |
| dc.date.accessioned | 2015-11-24T18:39:18Z | - |
| dc.date.available | 2015-11-24T18:39:18Z | - |
| dc.identifier.issn | 0024-9297 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17420 | - |
| dc.rights | Default Licence | - |
| dc.subject | frequency temperature | en |
| dc.subject | segmental dynamics | en |
| dc.subject | dipole relaxation | en |
| dc.subject | alpha-relaxation | en |
| dc.subject | molecular-weight | en |
| dc.subject | methacrylate) | en |
| dc.subject | crystallization | en |
| dc.subject | polyisoprene | en |
| dc.subject | polymers | en |
| dc.subject | acrylate | en |
| dc.title | Origin of glass transition of poly(2-vinylpyridine). A temperature- and pressure-dependent dielectric spectroscopy study | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | Doi 10.1021/Ma048555s | - |
| heal.identifier.secondary | <Go to ISI>://000224472500038 | - |
| heal.identifier.secondary | http://pubs.acs.org/doi/pdfplus/10.1021/ma048555s | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.publicationDate | 2004 | - |
| heal.abstract | The dynamics of poly(2-vinylpyridine) (P2VP) have been studied as a function of temperature (in the range from 123 to 453 K), pressure (0.1-270 MPa), and molecular weight (1.1 x 10(3)-3.0 x 10(4) g/mol), using dielectric spectroscopy (DS) within the frequency range from 10(-2) to 10(6) Hz. Structural methods (wide-angle X-ray scattering) have been employed in parallel with thermodynamic methods (pressure-volume-temperature). Three relaxation processes were found: two above the glass temperature (T-g) associated with the segmental (alpha-) process and a slower process with an apparent activation volume comparable to the monomer volume and another well below T-g, with an Arrhenius T dependence (beta-process). The results from the dynamic study combined with the thermodynamic results revealed that both decreasing thermal energy and insufficient volume lead to glass formation at lower temperatures, with the former having the stronger effect at temperatures near T-g (i.e., values of the ratio of apparent activation energies at constant volume and constant pressure in the range Q(V)/Q(P) similar to 0.6-0.85 for the different temperatures and pressures investigated). | en |
| heal.journalName | Macromolecules | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Papadopoulos-2004-Origin of glass tran.pdf | 332.1 kB | Adobe PDF | View/Open Request a copy |
This item is licensed under a Creative Commons License
