Abstract
A new method to estimate the pore volume of porous styrene–divinylbenzene copolymer beads is proposed. The estimated pore volume (PV e) is based on the solubility parameters ( δ i ) and the corresponding weight fractions ( f i ) of styrene, divinylbenzenes and diluents in the polymerization mixture. The equation used is: PV e = 1.136 ∑δ if i 2− 21.193∑δ if i+ 98.825 . Regression analysis results show that an ideally close match of the predicted pore volume and the pore volume determined by mercury porosimeter is achieved with R 2=0.99, when non-polar and moderately polar liquids are employed as diluents. In the case of strongly polar (H-bonding) liquids as diluents, the method should be used only to predict a trend towards an increase or decrease in pore volume, which occurs as a result of variation in the composition of polymerization mixture.
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