ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The Co60γ-irradiation-induced degradation of sulfonated styrene resins crosslinked with 4 and 8 mole-% m- or p-divinylbenzene isomers, or mixtures thereof including commercial divinylbenzene have shown a loss in capacity of 5-12.8% at radiation intensities of ca. 290,000 r./hr. and total doses of 0.91-1.90 X 108 rad in the presence of water. The loss is less for the 8% crosslinked resins and is less (2-6%) if irradiated dry. The resins crosslinked with commercial divinylbenzene show a slightly higher loss of capacity (11.2-11.9%) than do others (10.2-10.7%), presumably due to the ethylphenyl contamination. The moisture content also increases on irradiation; 13-16% for the 8% and 2.7-3.0% for the 4% resins at 1.90 X 108 rad. The meta crosslinked resin shows somewhat lower moisture content increase (1.5% for 8%; 0.8% for 4%), indicative of a more stable cross-linkage. The results are discussed in terms of the reactions involved: desulfonation, hydroxylation, and cleavage of crosslinkages.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1965.070090601
