engleski

SYNTHESIS OF NANOPOROUS CROSSLINKED POLY(ACRYL-N-CYCLOHEXYL AMIDE-CO- ETHYLENE GLYCOL DIMETHACRYLATE) BY THERMAL DEGRADATION OF POLY(ACRYL-N, N&#8217 ; ; -DICYCLOHEXYLUREA-CO-ETHYLENE GLYCOL DIMETHACRYLATE)

Crosslinked unswellable copolymers of acryl-dicyclohexylurea (A-DCU) with ethylene glycol dimethacrylate (EDMA) at monomer-to-monomer ratios in the feed: 0.3/0.7 ; 0.5/0.5 ; 0.7/0.3 ; 0.8/0.2 were prepared by free radical copolymerization in butanone in the presence of 1% of benzoyl peroxide. The reaction was performed up to high conversion yielding 99-100% of copolymer. Copolymers regardless to the ratio of comonomers in the feed decompose thermally by two step mechanism under the separation of almost quantitative yield of cyclohexylisocyanate (C6H11NCO). Residues after the removal of C6H11NCO are thermally stable nanoporous crosslinked copolymers of acryl-cyclohexylamide (A-CHA) with EDMA which decompose by one step mechanism between 300 and 4500C. In an attempt to compare the thermal properties of nanoporous poly(A-CHA-co-EDMA) with nonporous model compound prepared by copolymerization of A-CHA with EDMA it was found that both compounds have almost same thermal stability as proved by thermogravimetric analysis.

Acryl-N; N’; -dicyclohexylurea; Poly (Acryl-N; N’; -dicyclohexylurea-co-ethylene glycol dimethacrylate); Acryl-N-cyclohexylamide; Poly (Acryl-N-cyclohexylamide-co-ethylene glycol dimethacrylate); Thermal properties; Thermal degradation; Nanoporous crosslinked co

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