engleski

NANOPOROUS CROSSLINKED COPOLYMERS PREPARED BY THERMAL DEGRADATION OF POLY(METHACRYL-N, N'-DIISOPROPYLUREA-CO-ETHYLENE GLYCOL DIMETHACRYLATE)

Copolymers of methacryl-N, N'-diisopropylurea (MA-DiPrU) 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 in butanone in the presence of 2% of dibenzoyl peroxide (Bz2O2) at 700C for 48 hours. Copolymers regardless of the ratio of comonomers in the feed decompose thermally at 200-2500C under the separation of isopropylisocyanate (iPrNCO). Residues after the removal of iPrNCO are thermally stable nanoporous crosslinked copolymers of methacryl-isopropylamide (MA-iPrA) with EDMA which decompose by a one-step mechanism between 280 and 4500C. Nonporous model copolymers poly(MA-iPrA-co-EDMA) of similar composition, prepared by copolymerization of MA-iPrA with EDMA, decomposed also by one-step mechanism as shown by TGA measurements.

Methacryl-N; N'-diisopropylurea; Poly(Methacryl-N; N'-diisopropylurea-co-ethylene glycol dimethacrylate); Methacryl-N-isopropylamide; Poly(Methacryl-N-isopropylamide-co-ethylene glycol dimethacrylate); Thermal properties; Thermal degradation

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