Glass-transition and secondary relaxation in SBR-1502 from dynamic mechanical data

Authors
Cerveny, S Ghilarducci, A Salva, H Marzocca, AJ
Citation
S. Cerveny et al., Glass-transition and secondary relaxation in SBR-1502 from dynamic mechanical data, POLYMER, 41(6), 2000, pp. 2227-2230
Citations number
18
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
41
Issue
6
Year of publication
2000
Pages
2227 - 2230
Database
ISI
SICI code
0032-3861(200003)41:6<2227:GASRIS>2.0.ZU;2-0
Abstract
The dynamic mechanical behavior of a compound styrene-butadiene rubber (SBR -1502) was measured in the frequency range from 10(-3) to 10 Hz and between 80 and 300 K. The loss tangent data reveal two transitions, alpha and beta , characterized by the temperatures T-alpha and T-beta. Both processes show ed an Arrhenius behavior and so the activation energies were calculated. A molecular interpretation on the beta relaxation in SBR is also introduced. (C) 1999 Elsevier Science Ltd. All rights reserved.