Pregledni rad
A new approach to the preparation of molecularly imprinted polymers
Ana ERCEG KUZMIĆ
; INA-Industrija nafte d.d., Sektor istraživanja i razvoja, Zagreb
Radivoje VUKOVIĆ
; INA-Industrija nafte d.d., Sektor istraživanja i razvoja, Zagreb
Grozdana BOGDANIĆ
; INA-Industrija nafte d.d., Sektor istraživanja i razvoja, Zagreb
Ivan ŠMIT
; Institut Ruđer Bošković, Zagreb
Dragutin FLEŠ
; INA-Industrija nafte d.d., Sektor istraživanja i razvoja, Zagreb
Sažetak
This paper describes the synthesis and polymerization of acrylic monomers which contain dicyclohexylurea (DCU) as a pendant group. Crosslinked copolymers of these monomers with ethylene glycol dimethacrylate (EDMA) were prepared under the standard free radical initiated polymerization with dibenzoyl-peroxide (Bz2O2) as initiator, in butanone at 70 °C, up to high conversion. It was found that copolymers, regardless of the ratio of comonomers in the feed, thermally decompose by the two-step mechanism under the separation of almost quantitative yield of cyclohexylisocyanate, in the temperature range from 180 °C to 250 °C. The residues left by the removal of isocyanate were thermally stable crosslinked molecularly imprinted copolymers of acryl-cyclohexylamide (A-CHA) with EDMA, which decompose by a one-step mechanism between 300 °C and 450 °C.
In order to compare the properties of nanoporous crosslinked copolymers of A-CHA with EDMA with those of nonporous poly(A-CHA-co-EDMA) of the same molar composition, nonporous copolymers were prepared by the polymerization of A-CHA with EDMA under the conditions described above.
Ključne riječi
molecularly imprinted copolymer; imprinted copolymers; nanoporous copolymers; nonporous copolymers; poly(acryl-N,N’-dicyclohexylurea-co-ethylene-glycol dimethacrylate); poly(acryl-N-cyclohexylamide-co-ethylene-glycol dimethacrylate); thermal properties; s
Hrčak ID:
1582
URI
Datum izdavanja:
30.11.2005.
Posjeta: 1.387 *