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- W1990167997 abstract "The radiolysis of a poly(ethylene-co-propylene), Elpro, marketed by Thai Polypropylene Co. Ltd for the manufacture of medical goods has been investigated at 77 K. Calcium stearate was blended with the Elpro as a processing aid; and dioctyl phthalate, DOP, was added in various amounts as a radiation stabilizer. The ESR spectra of Elpro and Elpro+Ca were very similar and characterized principally by the presence of PP α-carbon radicals. The spectra of the samples containing DOP were similar to those for Elpro but with an additional narrow singlet arising from DOP radicals. On annealing the irradiated polymers to higher temperatures, the singlet was lost between 250 and 270 K, and at room temperature the principal radicals remaining were allyl radicals. The G-values for radical formation at 77 K for Elpro and Elpro+Ca at 77 K were 3.0 and 3.2, respectively, but incorporation of DOP resulted in lower G-values, ranging from 1.6 to 1.4 for 0.5 and 2.5 phr DOP, respectively. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 638–643, 2006" @default.
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- W1990167997 date "2005-01-01" @default.
- W1990167997 modified "2023-10-17" @default.
- W1990167997 title "An ESR study of the radiolysis of semi-crystalline ethylene-propylene copolymers containing DOP mobilizer" @default.
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- W1990167997 doi "https://doi.org/10.1002/app.22398" @default.
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