The Viscoelastic Properties of Crosslinked Poly(Ethylene Tetrasulfide) III

The Viscoelastic Properties of Crosslinked Poly(Ethylene Tetrasulfide) III

THE VISCOELASTIC PROPERTIES OF POLY(ETHYLENE TETRASULFIDE) CONTAINING 5% OF THE CROSSLINKING AGENT 1,2,3 TRICHLOROPROPANE, HAVE BEEN EXAMINED OVER A WIDE TEMPERATURE RANGE, ESPECIALLY IN THE TRANSITION REGION. THIS EXTENDS THE WORK PREVIOUSLY REPORTED ON THE PREPARATION OF CROSSLINKED POLY(ETHYLENE...

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Bibliographische Detailangaben
Hauptverfasser: Tobolsky,A. V, Beevers,R. B, Owen,G. D. T
Format: Report
Sprache:eng
Schlagworte:
Activation energy
Approximation(Mathematics)
Chlorides
Crosslinking(Chemistry)
Distribution
Mechanics
Plastics
Polyethylene
Polysulfides
Propane
Relaxation time
Transition temperature
Viscoelasticity
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Zusammenfassung:THE VISCOELASTIC PROPERTIES OF POLY(ETHYLENE TETRASULFIDE) CONTAINING 5% OF THE CROSSLINKING AGENT 1,2,3 TRICHLOROPROPANE, HAVE BEEN EXAMINED OVER A WIDE TEMPERATURE RANGE, ESPECIALLY IN THE TRANSITION REGION. THIS EXTENDS THE WORK PREVIOUSLY REPORTED ON THE PREPARATION OF CROSSLINKED POLY(ETHYLENE TETRASULFIDES) AND THEIR PROPERTIES IN THE REGION OF CHEMICAL STRESS RELAXATION. FROM THE RELAXATION CURVES THE MASTER CURVE HAS BEEN CONSTRUCTED AND THE FIRST AND SECOND APPROXIMATION TO THE DISTRIBUTION OF RELAXATION TIMES EVALUATED. THE DATA HAS BEEN FOUND TO FIT QUITE SATISFACTORILY TO A MODIFIED WILLIAMS-LANDEL-FERRY TYPE EQUATION. APPARENT ACTIVATION ENERGIES HAVE BEEN EVALUATED AND SHOW A MARKED TEMPERATURE DEPENDENCE WITH PEAK VALUE OF 207 K CALS MOLE TO THE NEGATIVE FIRST POWER AT -17 DEGREES C. (AUTHOR-PL).