Abstract
The radical polymerization of methylmethacrylate (1) in the absence and presence of potential transfer compounds such as 2-(4-methoxyphenylazo)anthraquinone (4) and 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol (5) is described. Neither the phenylazoanthraquinone nor the phenylbenzotriazol group affect the radical polymerization of MMA concerning the polymer properties of the respectively obtained PMMA (P1). The synthesis of the copolymer P2 by radical copolymerization of 3 mol% 2-[4-(6-methacryloyloxyhex-1,6-diyloxy)-phenylazo]anthraquinone (2) and 97 mol% 2-[3-(2H-benzotriazol-2yl)-4-hydroxyphenyl]ethylmethacrylate (3) is described. The composition of the randomlike copolymer P2 corresponds to the monomer feed. Since the molar mass of P2 is high (Mn = 156,000 g/mol), the transfer efficiency of monomers 2 and 3 is low. The electrochemical behavior of a thin film of P2 was investigated by cyclic voltammetry. For low and high sweep rates one redox wave was observed. The electrochemical behavior can be discussed as a reversible CECE redox mechanism. In future, the copolymer P2 needs to be investigated by spectroelectrochemical experiments to prove the electrochromic properties of P2. © 1998 John Wiley & Sons, Ltd.
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