Search results for: POLIAMIDY - Bridge of Knowledge

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Search results for: POLIAMIDY

Search results for: POLIAMIDY

  • Zastosowania chromatografii wykluczania (SEC) w analityce technicznej i preparatyce – część I-sza.

    W pracy scharakteryzowano założenia teoretyczne oraz mechanizm rozdzielania w warunkach chromatografii wykluczania (SEC). Przeanalizowano wady i zalety tej techniki rozdzielania. Przedstawiono przegląd zastosowań obejmujący wykorzystanie SEC w analityce technicznej oraz w preparatyce. SEC w warunkach liofilowych znajduje zastosowanie do rozdzielania mieszanin polimerów t.j. polistyren, polibutadien, poliizopren, poli(dimetylosiloksan),...

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  • Structure and properties of polyamides-epoxidized elastomers blends

    Publication

    - JOURNAL OF APPLIED POLYMER SCIENCE - Year 2006

    Badano mieszaniny poliamidów alifatycznych (PA6, PA 66, PA 12) zawierające do 15% wag. epoksydowanego elastomeru (statystycznego kopolimeru butadien - styren lub liniowego kopolimeru blokowego styren - butadien - styren). Stwierdzono, że właściwości mechaniczne badanych układów znacząco zależą od czasu mieszania. Oddziaływania w mieszaninach badano poprzez zmiany temepratury zeszklenia. Najbardziej korzystne, ze względu na polepszenie...

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  • Structure and Molecular Dynamics in Renewable Polyamides from Dideoxy-Diamino Isohexide

    Publication

    - MACROMOLECULES - Year 2012

    The chemical structure, the conformation, andthe flexibility of the polymer chain fragments present in thepolyamides synthesized from 2,5-diamino-2,5-dideoxy-1,4;3,6-dianhydrosorbitol, 1,4-diaminobutane, and either sebacic orbrassylic acid have been studied by liquid-state 2D NMRspectroscopy viz. correlation spectra (COSY) and heteronuclearmultiple-bond correlation spectra (gHMBC), by 13Ccross-polarization/magic-angle spinning...

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  • An Investigation of Polyamides Based on Isoidide-2,5-dimethyleneamine as a Green Rigid Building Block with Enhanced Reactivity

    Publication
    • J. Wu
    • L. Jasińska-Walc
    • D. Dudenko
    • A. Rozanski
    • M. Ryan Hansen
    • D. Van Es
    • C. E. Koning

    - MACROMOLECULES - Year 2012

    Novel, semicrystalline polyamides and copolyamides were synthesized from a new carbohydrate-based diamine, namely isoidide-2,5-dimethyleneamine (IIDMA). In combination with 1,6-hexamethylene diamine (1,6-HDA) as well as the biobased sebacic acid (SA) or brassylic acid (BrA), the desired copolyamides were obtained via melt polymerization of the nylon salts followed by a solid-state polycondensation (SSPC) process. Depending on the...

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  • Local Conformation and Cocrystallization Phenomena in Renewable Diaminoisoidide-Based Polyamides Studied by FT-IR, Solid State NMR, and WAXD

    Publication
    • L. Jasińska-Walc
    • M. Villani
    • D. Dudenko
    • O. Van Asselen
    • E. Klop
    • S. Rastogi
    • M. Ryan Hansen
    • C. E. Koning

    - MACROMOLECULES - Year 2012

    Biobased polyamides synthesized from diaminoisoidide (DAII), 1,4-diaminobutane, and sebacic acid are investigated by FT-IR, 13C{1H} magic-angle spinning/cross-polarization (CP/MAS) NMR spectroscopy, and WAXD. Their molecular conformation and mobility undergo distinct changes as a function of temperature and diaminoisoidide content in the compositions. The presence of randomly distributed diaminoisoidide (DAII) in the polyamides...

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  • Novel, Fully Biobased Semicrystalline Polyamides

    Publication

    - MACROMOLECULES - Year 2011

    Novel, semicrystalline polyamides and co(polyamides) were synthesized from biobased sebacic acid (SA), 2,5-diamino-2,5-dideoxy-1,4;3,6-dianhydroiditol (diaminoisoidide, DAII) as well as from 1,4-diaminobutane (DAB), also known as putrescine in nature. Low molecular weight polyamides were obtained by melt polycondensation of the salts based on these monomers or by interfacial polycondensation. In order to increase their molecular...

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