The influence of some polymerization conditions on the morphology
of poly(styrene-co-divinylbenzene) monoliths
Polimery 2002, No 3, 180
High internal phase emulsion (HIPE) precursors were used to prepare emulsions which were submitted to radical polymerization to yield poly(styrene-co-divinylbenzene) monolithic polymers. The morphology and mechanical properties of the resulting materials were studied in relation to selected polymerization conditions. As the amount of diizovinylbenzene (crosslinking agent) was increased, 10 ys. 50%, the cell size in the porous structure of the material fell. The hydrophile—lipophile balance (HLB) value of the surfactant used (sorbitan mono and/or trioleate) was found to be the crucial factor influencing the morphology: the lower HLB (from 4.3 to 3.5) surfactant resuited in smaller cells. Curing procedure (open ys. tightly closed containers) also affected the structure, yiz., the latter case yielded more fragile and chalky polymers.
Keywords: monolithic polymers, high internal phase emulsions, morphology of porous poly(styrene-co-divinylbenzene) materials