Pressure dependence of the local and global dynamics of polyisoprene
- 15 September 1999
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 111 (11) , 5201-5204
- https://doi.org/10.1063/1.479774
Abstract
We report on the pressure dependence of the local segmental and normal modes of a type-Apolymer (polyisoprene) using dielectric spectroscopy. We find that external pressure exerts a stronger influence on the dynamics of the segmental mode as compared to the longest normal mode which results in the crossing of the two modes at higher pressures. The predictions of the Rouse model are not adequate to explain the different shift factors even at elevated temperatures.Keywords
This publication has 12 references indexed in Scilit:
- Dynamics of Linear and Star Poly(oxypropylene) Studied by Dielectric Spectroscopy and RheologyMacromolecules, 1998
- An experimental and theoretical study of the PVT equation of state of butadiene and isoprene elastomers to 200°C and 200 MPaJournal of Polymer Science Part B: Polymer Physics, 1993
- Breakdown of the Rouse model for polymers near the glass transition temperatureThe Journal of Chemical Physics, 1993
- Relation between main and normal mode relaxations for polyisoprene studied by dielectric spectroscopyMacromolecules, 1993
- An explanation of anomalous dielectric relaxation properties of polypropylene glycolMacromolecules, 1992
- Temperature dependence of characteristic length for glass transitionPhysical Review Letters, 1992
- Dielectric relaxations and electrical conductivities of poly(alkyl methacrylates) under high pressureJournal of Polymer Science Part A-2: Polymer Physics, 1968
- Complex dielectric constant of dipolar compounds as a function of temperature, pressure and frequency. Part 1 .—General relations and a consideration of models for relaxationTransactions of the Faraday Society, 1964
- Complex dielectric constant of dipolar compounds as a function of temperature, pressure and frequency. Part 2.—The α–relaxation of polymethyl acrylateTransactions of the Faraday Society, 1964
- A Theory of the Linear Viscoelastic Properties of Dilute Solutions of Coiling PolymersThe Journal of Chemical Physics, 1953