Wyniki wyszukiwania dla: ESTER
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Thermal properties of terpoly(ester-b-ether-b-amide)s with aliphatic ester blocks
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DSC and thermal stability investigation of novel poly(ester-ether) glycolsand poly(ester-ether)urethanes.
PublikacjaOtrzymano serie nowych poli(estro-etero)dioli z kwasu adypinowgo.........
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Investigation of stability of ester-urethane prepolymers
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Rapeseed oil methyl ester production in an individual household
PublikacjaFatty acid methyl esters, commonly known as biodiesel, are a cheap and environmental-friendly fuel substitute for diesel engines. Aside from industrial production, individual biodiesel manufacturing is also and important method of fulfilling the requirements of EU Parliament directive no. 2003/30/WE about supporting the use of renewable fuels in transport. Individual FAME production guarantees easy access to the main raw material...
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Synthesis and Selected Properties of Ester Elastomer Containing Sorbitol
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Synthesis of ester derivatives of propylene glycol in the presence of zinc carboxylates.
PublikacjaZbadano wpływ temperatury i stężenia karboksylanów cynku na przebieg estryfikacji glikolu propylenowego kwasami tłuszczowymi. Otrzymano emulgatory, w których maksymalne stężenie monoestru wynosiło 55-57%.
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Syntheses, chemical strustures and properties of poly(ester-etherurethane)s crosslinked with styrene, synthesized from unsaturated oligo(alkylene ester-ether)diols and 4,4'-diphenylmethane diisocyanate
PublikacjaMetodą dwuetapową, w reakcji syntezy wytworzonych uprzednio oligo(alkilenoestro-etero)dioli (OAEE) z 4,4'-diizocyjanianem difenylometanu (MDI) otrzymano nowe nienasycone poli(estro-eterouretany) (NPEEUR), które następnie poddano sieciowaniu styrenem wobec inicjatorów polimeryzacji rodnikowej: nadtlenku metyloetyloketonu (MEKPO) i 2-etylocykloheksanianu kobaltu (EtHCo). Usieciowane PEEUR scharakteryzowano na podstawie badań wytrzymałości...
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Eco-Friendly Ether and Ester-Urethane Prepolymer: Structure, Processing and Properties
PublikacjaThis study concerns bio-based urethane prepolymers. The relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers was investigated. Bio-based prepolymers were obtained with the use of bio-monomers such as bio-based diisocyanate, bio-based polyether polyol or polyester polyols. In addition to their composition, the bio-based prepolymers...
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Biodegradable Poly(ester-urethane) Carriers Exhibiting Controlled Release of Epirubicin
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The synthesis and structure of a potential immunosuppressant: N-mycophenoyl malonic acid dimethyl ester
PublikacjaThe synthesis of a potential immunosuppressant, i.e. dimethyl ester of N-mycophenoyl malonic acid was optimized in the reaction of mycophenolic acid (MPA) with amino malonic dimethyl ester in the presence of propanephosphonic anhydride (T3P) as a coupling reagent. The structural properties of the obtained MPA derivative were investigated by NMR, MS and single crystal X-ray diffraction methods. Theoretical considerations of conformational...
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Femtosecond studies of the excited-state dynamics of ester-alkyloxy substituted zinc phthalocyanines
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Anticancer properties of ester derivatives of betulin in human metastatic melanoma cells (Me-45)
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Two novel nucleoside ester derivatives of chlorambucil as potential antileukemic prodrugs: a preliminary study
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The effect of hard/soft segment composition on radiation stability of poly(ester-urethane)s
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Evaluation of Influence of the Addition Nanofillers on the Mechanical and Thermal Properties Terpolymers Ester-Ether-Amide
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The influence of hard segment crosslinking on the morphology and mechanical properties of segmented poly(ester-urethanes)
PublikacjaPrównano właściwości i morfologie usieciowanych trójmetylolopropanem (TMP) i nieusieciowanych poliestrouretanów formowanych reaktywnie. W nieusieciowanych poliestrouretanach stwierdzono za pomocą AFM obecność agregacji domen segmentów sztywnych o wymiarze 70-380 nm. W usieciowanych poliuretanach zaobserwowano jedynie jednolicie rozmieszczone domeny segmentów sztywnych wielkości 20 nm. Właściwości mechaniczne wyraźnie różniły się,...
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Synthesis, Structure and Properties of Poly(ester-Urethane-Urea)s Synthesized Using Biobased Diamine
PublikacjaModern polymer science and technology is focused on the development of partial or fully green polymers. This focus is related to green chemistry trends, which propose using natural and renewable resources as monomers in the synthesis of polymers. In this study, biobased diamine was used as a chain extender of ester-urethane prepolymer. Obtained poly(ester-urethane-urea) contains 16 wt% of biobased diamine. There is mention of an...
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Betaine and L-carnitine ester bromides: Synthesis and comparative study of their thermal behaviour and surface activity
PublikacjaSix esters of both betaine and L-carnitine bromides, featuring alkyl groups ranging from C8 to C18 in length, have been synthesized. The thermal behaviour of these twelve bio-based salts has been analyzed and compared by thermal gravimetric analysis and differential scanning calorimetry. The L-carnitine alkyl ester bromides melted below 100 C and can hence be considered ionic liquids (ILs) with full rights. Conversely, the betaine...
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Synthesis and biological activity of ester derivatives of mycophenolic acid and acridines/acridones as potential immunosuppressive agents
PublikacjaImproved derivatives of mycophenolic acid (MPA) are necessary to reduce the frequency of adverse effects, this drug exerts in treated patients. In this study, MPA was coupled with N-(x-hydroxyalkyl)-9-acridone-4-carboxamides or N-(x-hydroxyalkyl)acridine-4-carboxamides to give respective ester conjugates upon Yamaguchi protocol. This esterification required protection of phenol group in MPA. Designed conjugates revealed higher...
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Morphology and properties of recycled polyethylene/ground tyre rubber/thermoplastic poly(ester-urethane) blends
PublikacjaThe growing amount of plastics waste produced every year resulted in development of mechanical and chemical recycling methods of polymers and their blends or composites. From the environmental point of view, the possibility of plastics waste reusing and recycling is desirable. In this study three polymer blends were obtained with using recycled polyethylene (RPE), ground tyre rubber (GTR) and thermoplastic poly(ester-urethane)...