Volatility of Antioxidants and Antiozonants II. Effect on Rubber Testing

Abstract

In the first paper of this series data were presented on the volatility and vapor pressure of eight antioxidants. The present work attempts to show how volatility-affects the performance of an antioxidant, particularly in accelerated aging tests. The usual accelerated tests are of two types: those using closed systems such as the air bomb, the oxygen bomb, and oxygen absorption, and those using open systems such as air oven aging and creep.

Sources of fine organic aerosol. 3. Road dust, tire debris, and organometallic brake lining dust: roads as sources and sinks

“…Besides wax components such as n-alkanes, n-alkanoic acids-labeled as 'stearic acid' by the manufacturing trade-also are added to the rubber stock formula (12,15,31) . According to the Merck Index (32), commercially used acids labeled as 'stearic acid' under United States Pharmacopoeia (U.S.P.)…”

Thermal loss of ultraviolet absorbers from bisphenol A (BPA) polycarbonate

“…°Uvinul is a registered trademark of BASF Wyandotte. 6 Cyasorb is a registered trademark of American Cyanamid.c DOBP and RMB are registered trademarks of Eastman Chemical Products. d Tinuvin is a registered trademark of Ciba-Geigy.…”

“…The A/A0 values shown are averages from two experiments; the greatest deviation from the values shown was ±0.04. 6 V¡ is the molar volume, in cm3/mol, determined from density measurements of the liquid UV absorber at 125 °C.c Not determined. UV absorber is a solid at 125 °C. determine what kind of losses, if any, would occur from the glassy state of polycarbonate.…”