Effects of Polymer Milling on Extraction

Workers at the National Bureau of Standards accept that an attachment of butyl residues of dibutyl-tin-diacetate to PVC radicals occurs in the presence of UV radiation  

Further losses on reaction induced decomposition products mainly occur when the extracts obtained are re-concentrated. Even the inherent volatility of some antioxidants - above all that of the phenols and aromatic amines (Table 2.7) is so high that it provides the basis of a direct determination in the polymer by vacuum sublimation as suggested by Yushkevichyute 

Reproduced from Schroder, Pure and Applied Chemistry [38] 

Antioxidant Vapour pressure (mm Hg) Loss of weight (%atl50 °C) 

Thus a separation by distillation of the 2,6-di- butyl-4-methylphenol from its dimer deactivation product at 100 C was successful and provided evidence for the isomerisation of the phenoxy radicals formed primarily to oxybenzyl radicals and their recombination to dioxydiphenylethane  

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