In order to prepare porous beads with good characteristics mixtures of diluents were used. The influence of the δ‐parameter values of the two diluents was investigated which constitute the mixture of diluents on the macroporous features.
The influence of the mixtures of 2‐ethyl hexyl alcohol/polystyrene (M̄w = 172000), 2‐ethyl hexyl alcohol/toluene, and gasoline (bp 110–125°C)/polystyrene on the styrene‐divinylbenzene macroporous copolymer features was investigated. It was found that the specific surface areas or the porosities of the macroporous copolymers were very sensitive to the modifications of the δ‐parameter values and the monomer composition.