Determination of the rate constants of recombination of macroradicals and stable radicals via the competitive-inhibition method

作者：Borisova O V^*; Zaremskii M Yu; Golubev V B; Plutalova A V; Borisov O V; Billon L

来源：Polymer Science - Series B, 2013, 55(9-10): 508-514.

DOI：10.1134/S1560090413080010

The rate constants of recombination, k (X), of propagating radicals with nitroxides in pseudoliving radical polymerization are determined via the competitive-inhibition method with the use of ESR spectroscopy. This method is applicable to determination of k (X) in the reactions of propagating radicals of styrene, acrylic acid, and methyl methacrylate with two stable radicals, the nitroxide diethylphosphono-2,2-dimethylpropyl nitroxide and the phenoxide galvinoxyl. The values of k (X) determined at 50A degrees C increase in the following sequence: diethylphosphono-2,2-dimethylpropyl nitroxide-TEMPO-galvinoxyl. The selectivity of the low-activity propagating radicals of styrene in reactions with stable radicals is shown.

• 出版日期2013-9