Abstract
Thermooxidative degradation in oxygen of aromatic diketones,crosslinked polyketones and model compounds has been investigated. It was found that 1,1'-di-(4'-phenoxybenzophenonyl ether exhibits the highest thermal stability among diketones. This is presumably due to the alternation of electron accepting and electron donating groups in the chain of this compound. On the basis of data on the oxidation kinetics of cross-linked polyketones and model compounds, it was established that the thermal stability of the latter is much higher. This is due to the fact that the polymer contains unsaturated structures and residual acetyl groups because the curing process of diacetylaromatic compounds is incomplete. It was shown that comparative thermal analysis (CTA) may be used to evaluate the extent of completeness of curing of di- and polyfunctional monomers.
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