Donor-Acceptor Complexes in Copolymerization. XXXVIII. Photoinduced Polymerization of Comonomer Charge Transfer Complexes of Styrene with Methyl Methacrylate and Acrylonitrile

Abstract

Abstract The copolymerizations of styrene (S) with acrylonitrile (AN) and with methyl methacrylate (MMA) under UV irradiation yield radical copolymers. The copolymerization of S and MMA in the presence of AlEt3 yields MMA-rich copolymer when S/MMA=1 under UV and equimolar, alternating copolymer when S/MMA ≥ 1 in the dark and S/MMA < 1 under UV. The copolymerization of S and AN in the presence of AlEt3 in the dark and under UV yields equimolar, alternating copolymer when S/AN=1 and nonequimolar copolymer when S/AN < 1. The copolymerization of S and AN in the presence of AlEt1.5Cl1.5 (EASC) under light yields equimolar, alternating copolymer when S/AN=25/75-75/25. The terpolymerization of S, MMA, and AN (100/50/50) in the presence of EASC at 10-90°C under UV and in the dark in the absence as well as in the presence of benzoyl