A rheology study of high-energy radiolysis of a semicrystalline ethylene-propylene copolymer containing DOP mobilizer

Fuzail, M., Hill, D. J. T., Park, Y. and Halley, P. (2006) A rheology study of high-energy radiolysis of a semicrystalline ethylene-propylene copolymer containing DOP mobilizer. Journal of Applied Polymer Science, 101 5: 3437-3441.


Author Fuzail, M.
Hill, D. J. T.
Park, Y.
Halley, P.
Title A rheology study of high-energy radiolysis of a semicrystalline ethylene-propylene copolymer containing DOP mobilizer
Journal name Journal of Applied Polymer Science   Check publisher's open access policy
ISSN 0021-8995
Publication date 2006
Sub-type Article (original research)
DOI 10.1002/app.24339
Volume 101
Issue 5
Start page 3437
End page 3441
Total pages 5
Place of publication Hoboken
Publisher John Wiley & Sons Inc
Collection year 2006
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract The ractiolysis of a poly(ethylene-co-propylene), Elpro grade P 750 J, marketed by Thai Polypropylene Co. Ltd. for the manufacture of medical goods, was investigated at ambient temperature and melt rheology measured. The roles of calcium stearate, blended with the Elpro as a processing aid, and dioctyl phthalate (DOP), added in various amounts as a radical scavenger, were assessed. Following radiolysis, G' and the viscosity of the polymer melts at 453 K both decreased with increasing radiation dose, even when the mobilizer was present. The results indicated that although the DOP did scavenge radicals, it did not protect the polymer from net chain scission in a low-dose regimen. The value of (G(S) - 4G(X)) was approximately 0.6-0.7. (c) 2006 Wiley Periodicals, Inc.
Keyword Poly(propylene)
Irradiation
Degradation
Stabilization
Rheology
Polymer Science
Molecular-weight
Gamma-radiation
Polypropylene
Crystallinity
Viscosity
Mechanism
Q-Index Code C1

 
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