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  • 1
    Electronic Resource
    Electronic Resource
    Polyurethane-polymethacrylic acid multi-block copolymers and their anionomers through “living” radical mechanism (1996)
    Springer
    Polymer bulletin 37 (1996), S. 711-717 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Polyurethane-polymethacrylic acid multi-block copolymers were synthesized from tetraphenylethane based polyurethane iniferter. Number of polymethacrylic acid blocks and molecular weight of block copolymers increased with increasing polymerization time which proves that the formation of block copolymers is through a “living” radical mechanism. The multi-block copolymers obtained were converted into their sodium anionomers. The multi-block copolymers and their anionomers have been characterized by FTIR, FTNMR and DSC analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295767
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  • 2
    Electronic Resource
    Electronic Resource
    Polyurethane telechelic cationomers containing end functional 4-vinylpyridinium moieties (1996)
    Springer
    Polymer bulletin 37 (1996), S. 737-742 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Telechelic polyurethane cationomers containing end functional 4-vinylpyridinium moieties have been synthesized by the reaction of 4-vinylpyridine on 2-bromoethanol terminated polyurethane. The polyurethanes were characterized by FTIR, FTNMR and DSC studies. The introduction of ionic groups into the polyurethane shifts the Tg to lower temperatures, the shift in Tg further increases with increase in ionic groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295771
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and properties of semi-interpenetrating polymer networks based on polyurethane ionomer/polyvinyl chloride (2000)
    Springer
    Journal of materials science 35 (2000), S. 1065-1068 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Semi-Interpenetrating polymer networks (IPNs) of polyurethane anionomers (IPU) with Polyvinylchloride (PVC) were synthesized and characterized by Fourier-transform infrared spectrophotometer (FT-IR), thremogravimetric analysis (TGA) and mechanical studies. The synthesized semi-IPNs were found to be compatible. The hydrogen bonding interactions and the thermal stabilities are discussed based on FT-IR analysis and thermogravimetric analysis (TGA). Tensile strength and hardness increase with increasing NCO/OH ratio and ionic content of the polyurethanes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004778707828
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  • 4
    Electronic Resource
    Electronic Resource
    Grafting of ethyl acrylate onto gelatin in water-isopropanol medium (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 128 (1984), S. 173-179 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurden Pfropfcopolymere durch Pfropfung von Ethylacrylat auf Gelatine hergestellt. Die Reaktion wurde in Wasser/Isopropanol (1 : 1 v/v) durchgeführt und lief innerhalb von 90 min ab. Das resultierende Produkt ist in den Lösungsmitteln der beiden Homopolymeren unlöslich. Das Vorliegen von Vinylpolymeren wurde durch IR-Spektren bestätigt.
    Notes: Graft copolymers were synthesized by grafting ethyl acrylate onto gelatin. The reaction was carried out in water-isopropanol medium (1:1 v/v). Reactions take place within 90 min. The resulting product is insoluble in solvents for the respective homopolymers. Presence of vinyl polymer was confirmed by IR spectra.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051280110
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  • 5
    Electronic Resource
    Electronic Resource
    Saponification kinetic study of mica-acrylonitrile graft copolymers (1988)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 157 (1988), S. 177-187 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Kinetik der alkalischen Hydrolyse von Glimmer-Acrylnitril-Pfropfcopolymeren wurde untersucht. Die Abhängigkeit des Verseifungsgrades von der Alkalikonzentration und der Hydrolysezeit wurde bestimmt. Chemische und spektroskopische Techniken wurden zur Bestimmung des Hydrolysemechanismus herangezogen.
    Notes: Kinetics of alkaline hydrolysis of mica-acrylonitrile graft copolymers was studied. The dependence of alkali concentration and the time of hydrolysis on the degree of saponification was determined. Chemical and spectroscopical techniques were used to determine the mechanism of hydrolysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1988.051570114
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of liquid-crystalline polyesters based on biphenyl-4,4′-diol (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 228 (1995), S. 1-11 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Adipinsäure wurde mit Thionylchlorid in Dimethylformamid zum Adipinsäuredichlorid umgesetzt, aus dem nach Zugabe von Biphenyl-4,4′-diol und 1,4-Butandiol flüssigkristalline Polyester hergestellt wurden. Dabei wurde das Verhältnis der Diolkomponenten variiert, ohne das Diol/Säure-Verhältnis zu ändern. Die Polyester wurden mittels 1H-NMR- und FT-IR-Spektroskopie, Elementaranalyse, thermogravimetrischer Analyse und Gelpermeationschromatographie charakterisiert. Das flüssigkristalline Verhalten der Polyester wurde durch DSC-Messungen und Polarisationsmikroskopie untersucht.
    Notes: The syntheses of liquid-crystalline polyesters of biphenyl-4,4′-diol and 1,4-butanediol with adipic acid were carried out by varying the mole ratios of the two diols, keeping the total mole ratio of diacid to diols constant. Adipic acid was first converted into adipoyl dichloride, which was then reacted with the diol(s) in dimethylformamide. The resultant polyesters were characterized by means of 1H NMR and FT-IR spectroscopy, elemental analysis, thermogravimetric analysis and gel permeation chromatography. The liquid-crystalline behavior of the polyesters was studied by differential scanning calorimetry and hot-stage polarization microscopy.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052280101
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new urethane-acrylic polymers (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 187 (1991), S. 1-10 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Eine neue Klasse von Urethan-Acrylat-Monomeren wurde durch Umsetzung von Diisocyanaten wie Toluylendiisocyanat (TDI) und Hexamethylendiisocyanat (HMDI) mit Hydroxyethylmethacrylat oder Hydroxypropylmethacrylat und gesättigten Alkoholen wie Stearylalkohol oder Decanol hergestellt und durch IR- und NMR-Spektroskopie charakterisiert. Durch radikalische Polymerisation dieser Monomeren wurden Acrylatpolymere mit Urethanseitengruppen erhalten, die IR-spektroskopisch, viskosimetrisch und thermisch charakterisiert wurden.Die thermodynamischen Parameter des Polymerabbaus wurden berechnet; ein möglicher Abbaumechanismus wird vorgeschlagen.
    Notes: A new class of urethane-acrylic monomers was synthesized from diisocyanates such as toluylene diisocyanate (TDI) and hexamethylene diisocyanate (HMDI), unsaturated alcohols like hydroxyethyl methacrylate (HEMA), hydroxypropyl methacrylate (HPMA), and saturated alcohols such as stearly alcohol and decanol. The monomers were characterized by IR and NMR spectroscopy. Urethane pendent acrylic polymers, obtained by polymerizing these monomers, were characterized by IR, solubility viscosity, and thermal studies. The thermodynamic parameters for the degradation were calculated and a probable degradation mechanism is proposed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051870101
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  • 8
    Electronic Resource
    Electronic Resource
    Modification of gelatin by grafting (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 131 (1985), S. 169-176 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Pfropcopolymerisation von Butylacrylat auf Gelatine wurde mit Kaliumpersulfat als Initiator sowohl in Wasser als auch in Wasser-Essigsäure als Reaktionsmedium durchgeführt. Für beide Systeme wurden kinetische Parameter wie Pfropfgeschwindigkeit, Pfropfgrad und Pfropfausbeute bestimmt. Die erfolgte Pfropfung wurde durch IR-Spektren der isolierten Pfropfäste nachgewiesen, die für Aminosäuren charakteristische Amidabsorptionsbanden zeigten.
    Notes: Graft copolymerization of butyl acrylate onto gelatin has been carried out using potassium persulphate as initiator both in aqueous and in water-acetic acid medium. Kinetic parameters like rate of grafting, percent grafting, and grafting efficiency were determined for the two systems. The grafting was proved by IR spectra of the isolated graft chains which showed amide absorption bands characteristic for the amino acids.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1985.051310114
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  • 9
    Electronic Resource
    Electronic Resource
    Study of ionomer blends based on a polyurethane cationomer and an acrylic anionomer (1996)
    Weinheim : Wiley-Blackwell
    Macromolecular Rapid Communications 17 (1996), S. 73-80 
    Details
    ISSN: 1022-1336
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyurethane and polyurethane cationomers were synthesized using 2,3-dihydroxypyridine and 2,3-dihydroxypyridine hydrochloride as chain extenders. Poly(butyl methacrylate-co-methacrylic acid) was synthesized by free radical solution polymerization and was converted into its sodium salt. The polyurethane cationomer and the acrylic anionomer were blended in different proportions in N,N-dimethylformamide. Simple blends without ionic groups were also prepared. Miscibility enhancement in these systems was studied by means of differential scanning calorimetry and scanning electron microscopy.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1996.030170201
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  • 10
    Electronic Resource
    Electronic Resource
    Graft copolymerization of ethyl acrylate onto gelatin using hydrogen peroxide and ascorbic acid in aqueous medium (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 23 (1985), S. 2865-2874 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gelatin a derived protein from collagen can be modified at 60°C by allowing it to react with ethyl acrylate by use of a novel initiator technique. The polymeric ethyl acrylate side chain is chemically bonded to gelatin. The effects of synthetic variable in the graft copolymerization reactions have been discussed in the light of percent grafting, grafting efficiency, and the rate of polymerization.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.170231114
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