MODELS FOR POLYBUTADIENE PORE WALL COATINGS IN POROUS ZIRCONIA

We present three models of the changes in measured pore size distribut ion for cylindrical pores when a polymer is deposited in the pores by evaporation from a volatile solvent. The predicted results serve as an aid in interpreting experimental nitrogen adsorption data for polybut adiene (PBD) coatings on porous zirconia. At low loadings, PBD appears to deposit in thin layers on the surface with no preference for filli ng either large or small pores. At higher PBD loadings, the polymer de posits preferentially in smaller pores. This is in qualitative agreeme nt with PBD coatings on porous silica.