Reactivity ratios of 4-chloro-2-(4'-vinylphenyl)-5-phenyloxazole and methyl methacrylate for copolymerization

Abstract

The reaction between p-ethylbenzaldehyde and benzoyl cyanide in a tetrahydrofuran solution saturated with hydrogen chloride gas gave 4-chloro-2-(4'-ethylphenyl)-5-phenylozaxole. Its bromination by N-bromosuccinimide followed by dehydroboromination with sodium t-butoxide gave 4-chloro-2-(4'-vinylphenyl)-5-phenyloxazole. Poly[4-chloro-2-(4'-vinylphenyl)-5-phenyloxazole-co-methyl methacrylate] at different monomer ratios was synthesized using solution copolymerization in toluene at 50+-1 ํC. AIBN was used as the initiator. The various copolymer ratios in toluene to give conversion less than 10% have been analyzed by gas chromatography and characterized by NMR spectroscopy. The monomer reactivity ratios were determined by Fineman-ross method which give r4-Cl-(vinyl)-PPO = 1.07 and rMMA = 0.38