Diad,triad, and pentad sequence-distribution analysis of acrylonitrile–vinylidene chloride model copolymers by 13C-NMR

The DMSO solution copolymerization of acrylonitrile and vinylidene chloride can be adequately described by the terminal-unit copolymerization model. The sequence distribution measured by ¹³C-NMR is in excellent agreement with the theoretically calculated diad, triad, and pentad distributions. The variation of glass transition temperatures with copolymer composition is explained by sequence distribution.