Grafting of Hindered Amine Groups on EPDM and Polyoctenamer via Photo-Hydroperoxidation

Universite B. Pascal et ENS Chimie de Clermont-Ferrand 63177 Aubiere - France 2 

Polymer Institute, Slovak Academy of Sciences 842-36 Bratislava, Slovak Republik 

The reaction of singlet oxygen with double bonds is a convenient way to produce hydroperoxides both from unsaturated low molecular weight compounds as well as unsaturated polymers1 4. The reaction is quite selective (low formation of carbonyl and alcoholic by-products) with a yield up to 20 and 40 % according to the substrate. 

Singlet oxygen can be chemically or photochemically produced. In the latter case, specific photosensitizers and suitable wavelengths are required. 

Hydroperoxides, can be afterwards easily decomposed by thermal or photoirradiations in moderate conditions (T 80°C or X 300 nm)5 8. For example, these compounds are well known to be key products in autooxidation of hydrocarbons or in natural ageing of most polymers. Main reactions are as follows  

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GRAFTING OF HINDERED AMINES GROUPS ON EPDM AND POLYOCTENAMER VIA PHOTO-HYDROPEROXIDATION... 

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