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      저자 : Jacek Lubczak (검색결과 3 건)
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        Polyurethane Foams with 1,3,5-Triazine Ring and Silicon Atoms

        Jacek Lubczak,Ewelina Chmiel 한국고분자학회 2019 Macromolecular Research Vol.27 No.6

        The method of obtaining polyurethane foams based on two oligoetherols, synthesized from (1) melamine and propylene carbonate, and (2) from metasilicic acid, glycidol and ethylene carbonate, is elaborated. The physical properties of PUFs are tested depending on composition of oligoetherol substrates mixture used. It has been found that 1,3,5-triazine rings in PUF increase their thermal resistance, while silicon contributes to improvement of mechanical properties of PUF. The siliconmodified P U Fs c an s tand l ong term h eating a t 150-200oC with concomitant increase of compression strength and decrease of flammability of PUFs. The PUFs heated at 150 oC for one month become self-extinguishing, or even inflammable upon exposure at 175 oC.

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        Oligoetherols and polyurethane foams based on cyclotriphosphazene of reduced flammability

        Jacek Lubczak,Renata Lubczak 한국고분자학회 2023 Macromolecular Research Vol.31 No.5

        New oligoetherols with based on cyclotriphosphazene ring were synthesized by functionalization of hexachlorocyclotriphosphazene with glycidol followed by reaction with ethylene glycol and glycerol. Oligoetherols were characterized by IR, 1H-NMR, and MALDI-ToF and hydroxyl number as well as physical properties like density, viscosity and surface tension. The oligoetherols were further converted into polyurethane foams. The rigid foams of enhanced thermal stability and considerably diminished flammability were obtained and their apparent density, water uptake and polymerization shrinkage, thermal conductivity coefficient and thermal stability were determined. The flammability of foams was studied by microcalorimetric methods, horizontal flaming test and oxygen index. The obtained polyurethane foams with incorporated cyclotriphosphazene ring are self-extinguishing.

      • KCI등재

        Modification of Polyurethane Foams with 1,3,5-Triazine Ring and Boron

        Ewelina Chmiel,Jacek Lubczak,Ryszard Stagraczyński 한국고분자학회 2017 Macromolecular Research Vol.25 No.4

        Boric acid was hydroxyalkylated with glycidol and ethylene carbonate. The product of hydroxyalkylation of boric acid was used to modify oligoetherol obtained from melamine and propylene carbonate. The obtained mixture was further used to get polyurethane foams (PUFs) by reaction with diphenylmethane isocyanate in presence of water. The foaming with diphenylmethane isocyanate containing 30 % tri-functional isocyanates resulted in formation of polyurethane foams of enhanced thermal resistance and diminished flammability in comparison with analogous PUFs based on 1,3,5-triazine ring.

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