Abstract
The course of the Ritter reaction has been investigated for poly(acrylonitrile) with tert.-butyl alcohol in the presence of sulphuric acid in tetramethylene sulphone. From the rate constants, activation parameters and their dependence on molecular mass, tacticity, concentration of the reaction mixture and extent of the reaction, and from composition of the reaction products, it was concluded that the reaction proceeded by a non-acceleration mechanism with formation of a random copolymer acrylonitrile— N-tert.-butylacrylamide. At about 55% conversion of nitrile groups, the reaction is considerably slowed down, obviously due to a conformational change of the chain.
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