Aging of Rubber and Its Retardation by the Surface Application of Antioxygens¹Diffusion Process

Abstract

deterioration of rubber may be due to any one or a combination of a large number of factors, such as oxidation, depolymerization, continued vulcanization, action of heat or light, and so on. The present paper will deal with the preservative action of antioxygens (12,15) when applied on the surface of articles, and with some general remarks on the use of antioxvgens. Comparison of Accelerated Aging TestsThe only test not open to criticism is one which measures the aging of an article under actual service conditions and the writers used it in many control experiments. This test has the disadvantage of consuming an excessive amount of time and of not being suitable for a series of studies. Hence

Auto-oxidation.

“…Analogously luciferin may be assumed to autooxidize forming a dative peroxide rich in energy content, which rearranges and decomposes in the presence of luciferase in such a manner as to liberate part of its energy as light. That this might be the case is borne out by the work of Moureu and his collaborators (191) on the chemiluminescence emitted during the decomIs For an excellent theoretical treatment of chemiluminescence, see Griffith and McKeown (188). position of rubrene peroxide (see p. 340).…”

Interplay of thermochemistry and structural chemistry, the journal (volume 24, 2013, issues 3–4) and the discipline

“…A composite field effect, the main component of which originates from the long-range effect of the substituent enhanced by field-induced p-polarization of the vinylene spacer and resonance-induced field effects, was revealed. Styrenes of the type C 6 H 5 -CH=CH-X for which there are enthalpy of formation data are relatively rare; aside from X = H, there are data for X = CH 3 [60], C 6 H 5 , COOH, COCH 3 [61,62], and COC 6 H 5 [61].…”

Interplay of thermochemistry and Structural Chemistry, the Journal (volume 22, 2011, issues 1–3) and the discipline

“…The results have been additionally confirmed by DFT calculations. A contemporary study of the energetics of this enol, C 6 H 5 -C(O)-CH=C(OH)-C 6 H 5 with the classically called chalcone, the related ''olefin'' C 6 H 5 -C(O)-CH=CH-C 6 H 5 , would be informative [74].…”