Compatibilization of copolymers in solution through interchain hydrogen bonding

Low concentrations of polar units interacting through hydrogen bonds were introduced in polystyrene and polyvinylacetate chains by free radical copolymerization. Phase diagrams of copolymer mixtures in tetrahydrofuran were investigated. The influences on cloud-point isotherms of polar comonomer nature and concentration, and of copolymer molecular weight were studied. Viscometry appears to be reliable for evaluating the interactions betwen the different copolymers synthesized.