Influence of pressure on a free radical decay in a rigid main chain thermotropic polymer

Influence of pressure on a free radical decay in a rigid main chain thermotropic polymer

Free radical decay has been studied in a gamma-irradiated rigid rod-like liquid crystalline copolymer over wide ranges of pressure (1–900 MPa) and temperature (70–140°). Rate constants and activation volumes for the decay were determined. A remarkable decrease of activation volume at temperatures ab...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:European polymer journal 1991, Vol.27 (4), p.433-434
Hauptverfasser: SZOCS, F, KLIMOVA, M
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Free radical decay has been studied in a gamma-irradiated rigid rod-like liquid crystalline copolymer over wide ranges of pressure (1–900 MPa) and temperature (70–140°). Rate constants and activation volumes for the decay were determined. A remarkable decrease of activation volume at temperatures above T g of the polymer was observed and attributed to rotational structural order along the long axis of the rod-life molecules.
ISSN:0014-3057
1873-1945
DOI:10.1016/0014-3057(91)90201-X