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  • Electronic Resource  (26)
  • Polymer and Materials Science  (24)
  • Aminosugar metabolism  (2)
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  • Electronic Resource  (26)
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  • 11
    Electronic Resource
    Electronic Resource
    Influence of dimethyl sulfoxide on the kinetics of the graft copolymerization of acrylonitrile onto the jute fibers initiated by ceric ion (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 39 (1990), S. 1079-1086 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A study of the influence of dimethyl sulfoxide (DMSO) on the graft copolymerization of acrylonitrile (AN) onto jute fiber using ceric ion has been made. The effect of concentrations of monomer, Ce(IV) and DMSO on graft yield have been studied. Besides, the effect of time, temperature, acid, and the amount of jute fiber on graft yield has been investigated. On the basis of experimental findings, a reaction mechanism has been proposed and optimum condition for effective grafting has been suggested.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070390505
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  • 12
    Electronic Resource
    Electronic Resource
    Effect of toluene on the polymerization of AN initiated by Ce(IV)-sucrose redox system in the presence of surfactants (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 49 (1993), S. 1107-1113 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effects of toluene on the kinetics of polymerization of acrylonitrile (AN) initiated by the Ce(IV)/sucrose redox system were studied in the presence of an emulsifier, N-cetyl-trimethylammonium bromide (NCTAB) in the temperature range 35-45°C. The effects of concentration of metal ion, monomer, sulfuric acid, substrate (sucrose), emulsifier, toluene, some inorganic salt, and organic solvent on Rp have also been investigated. The remarkable features of the investigation involve the derivation of the rate expression for the above system with the calculation of activation energy. © 1993 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070490617
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  • 13
    Electronic Resource
    Electronic Resource
    Influence of N-acetylglycine on the kinetics of the ceric ion-initiated graft copolymerization of acrylonitrile and methyl methacrylate onto jute fibers (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 52 (1994), S. 1557-1568 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The influence of N-acetylglycine on the kinetics of graft copolymerization of acrylonitrile (AN) and methyl methacrylate (MMA) onto chemically modified jute fibers was studied in the temperature range 40-60°C. The optimum conditions for grafting have been determined by studying the effects of concentrations of monomers, Ce(IV), and N-acetylglycine on the rate of grafting. Besides the effect of time, temperature, and concentration of the acid, the amount of jute fibers and some organic solvents and inorganic salts on the rate of grafting has been investigated. On the basis of experimental findings, a kinetic scheme has been proposed. Infrared spectra of chemically modified jute and grafted jute have been investigated. More than 185% graft yield could be achieved with the present system. Grafting has improved the thermal stability of jute fibers. © 1994 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070521104
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  • 14
    Electronic Resource
    Electronic Resource
    A study on grafting of methyl methacrylate onto jute fiber (S2O82--thiourea redox system) (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 33 (1987), S. 2809-2819 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A study of the graft copolymerization of methyl methacrylate onto jute fiber, using K2S2O8-thiourea (TU) redox-initiating system has been made. The effects of concentration of monomer, S2O82-, TU on graft yield have been studied. Besides the effects of time, temperature, acid, and amount of jute fiber, some inorganic salts and organic solvents on graft yield have been investigated. The most remarkable features of the investigation include proposition of a mechanism for the grafting process and characterization of grafted fiber by infrared (IR) and thermogravimetric studies. Grafting has improved the light fastness of jute fibers dyed with basic dyes. More than 200% graft yield could be achieved in the present investigation.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070330815
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  • 15
    Electronic Resource
    Electronic Resource
    Graft polymerization of methyl methacrylate onto silk fibers with Ce(VI)-sucrose redox system (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 28 (1983), S. 1811-1813 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1983.070280523
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  • 16
    Electronic Resource
    Electronic Resource
    Vanadium-cyclohexanone-initiated graft copolymerization of methyl methacrylate onto jute fibers (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 1763-1769 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Graft copolymerization of methyl methacrylate (MMA) was carried out on jute fibers using a V5+ -cyclohexanone redox initiator system. The effect of the concentration of acid, monomer, and V5+ on graft yield have been studied. In order to obtain optimum conditions of grafting, the effects of temperature, acid, reaction medium, solvent, and some inorganic salts on graft yield have been investigated. The most remarkable features of the investigation include the proposition of a mechanism and derivation of rate expression for the grafting process. More than 100% grafting could be achieved with the present system.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310621
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  • 17
    Electronic Resource
    Electronic Resource
    Redox-initiated graft copolymerization onto modified jute fibers (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 34 (1987), S. 1325-1327 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070340336
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  • 18
    Electronic Resource
    Electronic Resource
    Graft copolymerization of methyl methacrylate onto jute fibers. Studies on vanadium (V)-cyclohexanol redox system (1987)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 147 (1987), S. 185-197 
    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 wurde die Pfropfcopolymerisation von Methylmethacrylat auf Naturjute (chemisch modifiziert) unter Verwendung von V5+-Cyclohexanol als Redoxinitiatorsystem untersucht. Die Einflüsse von Zeit, Metallionenkonzentration (V5+), Monomerem (MMA), Substrat, Anteil an Jutefasern, Temperatur und Säurekonzentration auf die Pfropfausbeute sind bestimmt worden. Es wurde auch der Einfluß einiger organischer Lösungsmittel und anorganischer Salze auf die Pfropfausbeute untersucht. Es wird ein Mechanismus für die Pfropfreaktion angegeben und das Geschwindigkeitsgesetz abgeleitet. Das Pfropfen hat die thermische Stabilität und die Lichtechtheit der Jutefasern, die mit basischen Farbstoffen gefärbt sind, verbessert. IR-Spektren von Naturjute (chemisch modifiziert) und gepfropfter Jute wurden aufgenommen. Eine Pfropfausbeute von mehr als 170% konnte mit diesem System erreicht werden.
    Notes: Graft copolymerization of methyl methacrylate (MMA) onto natural jute (chemically modified) was studied using V5+ -cyclohexanol redox initiator system. The effects of time, concentration of metal ion (V5+), monomer (MMA), substrate, amount of jute fibers, temperature, and acid concentration on graft yield have been studied. The effects of some organic solvents and inorganic salts on graft yield have also been studied. A grafting mechanism is proposed and an expression has been derived for the reaction rate. Grafting has improved the thermal stability and the light fastness of jute fibers dyed with basic dyes. IR spectra of the natural jute (chemically modified) and grafted jute have been taken. More than 170% graft yield could be achieved with the present system.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1987.051470116
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  • 19
    Electronic Resource
    Electronic Resource
    Reactivity ratios of some substituted aromatic amines by linear graphical methods (1983)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 115 (1983), S. 103-114 
    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 Copolymerisationsparameter einiger halogensubstituierter aromatischer Amine wurden nach der Methode von Kelen-Tüdős und Fineman-Ross graphisch bestimmt. Bei der Copolymerisation mit den Comonomeren p-Toluidin oder p-Nitrophenol erwies sich die Reaktivität der halogensubstituierten aromatischen Amine in der Reihenfolge der Basenstärke ansteigend. Jedoch kehrt sich diese Reihenfolge um, wenn diese halogensubstituierten Amine mit p-Nitroanilin copolymerisiert werden. Diese Umkehr der Reaktivität wurde mit der Polarisation und Resonanzstabilisierung der Monomeren erklärt.
    Notes: Reactivity ratios of some halogen substituted aromatic amines have been determined by using Kelen-Tüdős and Fineman-Ross linear graphical methods. On copolymerization with p-toluidine or p-nitrophenol as comonomer, the reactivity of halogen substituted aromatic amines was found to be in the order of their basic strength. However, this order of reactivity gets reversed when these halogen substituted amines are copolymerized with p-nitroaniline. This reversal of reactivity has been interpreted in terms of polarization and resonance stabilization of the monomeric species.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1983.051150109
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  • 20
    Electronic Resource
    Electronic Resource
    Retardation of V5+-thiourea initiated polymerization of acrylonitrile by phenol (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 142 (1986), S. 69-78 
    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: Kinetik und Mechanismus der Verzögerung der Polymerisation von Acrylnitril mit einem V5+-Thioharnstoffkomplex als Initiator durch Phenol wurden im Temperaturbereich von 40-50°C untersucht. Die Auswirkung von Verzögerungsagens (Phenol), Metallion, Monomerem, Schwefelsäure, einigen anorganischen Salzen und organischen Lösungsmitteln wurden ebenfalls untersucht. Die bemerkenswerteste Beobachtung in der vorliegenden Untersuchung ist die Tatsache, daß bei der Auftragung von [M]/Rp gegen 1/[M] ein positiver Achsenabschnitt erhalten wird. Ein Reaktionsmechanismus und eine passende Geschwindigkeitsgleichung wurde vorgeschlagen und anhand der experimentellen Ergbnisse erläutert.
    Notes: Studies have been made on the kinetics and mechanism of the retardation of V5+-thiourea initiated polymerization of acrylonitrile by phenol in the temperature range 40 - 50°C. The effects of retarder (phenol), metal ion, monomer, sulphuric acid, some inorganic salts, and organic solvents have also been studied. The most remarkable observation in the present investigation is the positive intercept obtained from the plot of [M]/Rp vs. 1/[M]. A reaction mechanism has been suggested and a suitable rate expression has been proposed and explained in the light of experimental findings.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051420106
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