HIGH-PRESSURE EFFECT ON MOLECULAR MOTIONS IN THE PARAELECTRIC PHASE OF A VINYLIDENE FLUORIDE AND TRIFLUOROETHYLENE COPOLYMER (70 30) STUDIED BY NMR/

Authors
STOCKSCHWEYER M MEURER B WEILL G
Citation
M. Stockschweyer et al., HIGH-PRESSURE EFFECT ON MOLECULAR MOTIONS IN THE PARAELECTRIC PHASE OF A VINYLIDENE FLUORIDE AND TRIFLUOROETHYLENE COPOLYMER (70 30) STUDIED BY NMR/, Polymer, 35(10), 1994, pp. 2072-2077
Citations number
25
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
35
Issue
10
Year of publication
1994
Pages
2072 - 2077
Database
ISI
SICI code
0032-3861(1994)35:10<2072:HEOMMI>2.0.ZU;2-X
Abstract
The F-19 n.m.r. spin-lattice relaxation times in both the laboratory a nd the rotating frame have been measured in a 70/30 mol% random copoly mer of vinylidene fluoride and trifluoroethylene, over a range of pres sures from 0.1 to 200 MPa in the paraelectric phase. Molecular motions have been investigated in this condis phase, and correlation times we re obtained as a function of pressure and temperature. Activation para meters have been determined and discussed in terms of a thermally acti vated model and compared with literature data.