Hydroperoxide groups infrared spectroscopy

A series of reactions with gases have been selected for the rapid quantification of many of the major products from the oxidation of polyolefins. Infrared spectroscopy is used to measure absorptions after gas treatments. The gases used and the groups quantified include phosgene to convert alcohols and hydroperoxides to chloroformates, diazomethane to convert acids and peracids to their respective methyl esters, sulfur tetrafluoride to convert acids to acid fluorides and nitric oxide to convert alcohols and hydroperoxides to nitrites and nitrates respectively. 

When polymers have been degraded photochemically in the presence of air, oxygen-containing groups, such as hydroperoxide, carbonyl groups and alcohols, are observed in the polymer by infrared spectroscopy. These groups are formed by the chain reactions of oxidation (Eq. (23)). Other kinds of chemical bonds may also be influenced by... 

The oxidized polyethylene (OZPE) waxes have been characterized by infrared (IH) spectroscopy and nuclear magnetic resonance (%-NMR) spectrometry. IR spectroscopy is able to show the formation of various oxygen-containing groups during the oxidation of the PE waxj 3555 cm" hydroperoxide (R-O-O-H) 3380 cm l hydroxyl (R-OH) 1785 cm l peracid (R-CO-O-O-H) ... 

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