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  • 1
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto wool fibers II. Graft copolymerization of methylmethacrylate onto wool by quinquevalent vanadium ion (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 71 (1978), S. 189-199 
    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 Propfpolymerisation von Methylmethacrylat auf Wolle, ausgelöst durch fünfwertiges Vanadium, wurde in schwefelsaurem Medium untersucht. Die Pfropfgeschwindigkeit wurde unter Variieren von Monomerkonzentration, V5+-Konzentration, Temperatur, Acidität des Mediums, der Wollart, des Reaktionsmediums und der Art der Monomeren untersucht. Die Ausbeute steigt merklich mit steigender Monomerkonzentration, steigender V5+-Konzentration und Temperatur. Die Pfropfausbeute wird beträchtlich durch vorangehende chemische Modifikation beeinflußt. Ein kinetisches Schema wird vorgeschlagen und die Geschwindigkeitsgleichung bestimmt.
    Notes: Graft copolymerization of wool with methylmethacrylate induced by quinquevalent vanadium (V5+) was studied in sulfuric acid medium. The rate of grafting was determined by varying the concentrations of monomer and vanadium (V) ion, of the temperature, acidity of the medium, nature of wool, different arylic monomers, and reaction medium. The graft yield increases significantly by increasing the monomer concentration, it is also increased by increasing V5+ concentration, and temperature. The graft yield is considerably influenced by chemical modification prior to grafting. A suitable kinetic scheme has been proposed and the rate equation has been derived.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050710115
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  • 2
    Electronic Resource
    Electronic Resource
    Adsorptive behaviour of indian chokla wool towards metallic ions (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 66 (1978), S. 15-22 
    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: Indische Chokla-Wolle wurde mit fünf verschiedenen Arten von Metallionen behandelt (Fe3, Mn3+, Ce4+, V5, Cr6+). Das Adsorptionsverhalten wurde untersucht um festzustellen, auf welche Art Wolle und Metallionen gebunden sind. Der Einfluß von Einwirkungszeit, Konzentration und Temperature auf die Menge adsorbierter Metallionen wurde ermittelt. Eine Chelat-Bindung zwischen Metallionen und Wolle wird postuliert.
    Notes: Indian Chokla wool was treated with five different kinds of metallic ions (Fe3+, Mn3+, Ce4+, V5+, Cr6+), and the adsorptive behaviour was studied to elucidate the manner in which wool and the metallic ions were combined. The effect of time of treatment, concentration and temperature upon the amount of the metallic ions adsorbed were examined. Considering the various factors it is suggested that chelate bonds are formed between the metallic ions and the groups present in wool.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050660102
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  • 3
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto silk fibers III. Graft copolymerization of methyl methacrylate onto silk using tetravalent cerium as initiator (1979)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 75 (1979), S. 29-39 
    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 Verwendung von Cer(IV) zur Auslösung der Pfropfcopolymerisation von Methylmethacrylat auf Seide wurde untersucht. Die Pfropfgeschwindigkeit wurde als Funktion der Monomerkonzentration, der Cer(IV)-Konzentration, der Temperatur und der Art der Seide ermittelt. Die Pfropfausbeute steigt bei Erhöhen der Monomerkonzentration bis zu 0,65 mol/1; bei weiterer Erhöhung fällt sie wieder. Der Prozentsatz an gepfropftem Material steigt mit steigender Cer(IV)-Konzentration bis zu 0,03 mol/1 und fällt anschließend wieder. Die Reaktionsgeschwindigkeit ist temperaturabhängig; mit steigender Temperatur nimmt die Pfropfausbeute zu. Das Pfropfen wird merklich durch die chemische Vorbehandlung beeinflußt. Der Einfluß verschiedener Gegenionen zum Cer(IV) sowie der Zusatz von CuSO4 auf die Pfropfgeschwindigkeit wurde ebenfalls untersucht.
    Notes: The use of tetravalent ceric ions to initiate graft-copolymerization of methyl methacrylate onto silk has been investigated. The rate of grafting has been determined by varying monomer, cerium (IV), temperature, and nature of silk. The graft yield increases with increasing monomer concentration up to 0.65 mol/l and with further increase of monomer, the graft yield decreases. The percentage of grafting increases with increasing ceric ion concentration up to 0.03 mol/l and thereafter it decreases. The rate of reaction is temperature dependent, with increasing temperature, the graft yield increases. The grafting is considerably influenced by chemical modification prior to grafting. The effect of different species of ceric ion and CuSO4 on the rate of grafting has also been investigated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1979.050750102
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  • 4
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto silk fibers IV. Graft copolymerization of methyl methacrylate onto silk using bromate-thiourea redox system (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 85 (1980), S. 29-39 
    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: Der Einsatz eines Bromat-Thioharnstoff-Redoxsystems zum Auslösen einer Pfropfcopolymerisation von Methylmethacrylat auf Seide wurde untersucht. Die Pfropfgeschwindigkeit wurde untersucht in Abhängigkeit der Bromationen-, Monomer- und Thioharnstoffkonzentration, der Temperatur und des Lösungsmittels. Die Pfropfausbeute stieg mit steigender Bromationenkonzentration bis zu 20 mmol/1, mit steigender HCl-Konzentration bis 40 mmol/1, mit steigender Thioharnstoffkonzentration bis 15 mmol/1. Höhere Konzentrationen der angegebenen Komponenten führten jeweils zu einer Abnahme der Pfropfausbeute. Außerdem stieg die Pfropfausbeute mit steigender Temperatur. Verschiedene wasserlösliche Lösungsmittel beeinflussen die Pfropfausbeute merklich. Die Alkalilöslichkeit der gepfropften Faser wurde ebenfalls untersucht.
    Notes: The use of a bromate-thiourea redox system to initiate graft copolymerization of methyl methacrylate onto silk has been investigated. The rate of grafting has been determined by varying the concentration of bromate ion, monomer, thiourea, the temperature and the solvent. The graft yield increases with increasing the bromate ion concentration up to 20 mmo1/1. With further increase of oxidant the graft yield decreases. The percentage of grafting increases with increase of hydrochloric acid up to 40 mmo1/1. Thereafter it decreases. The effect of increasing thiourea concentration up to 15 mmo1/1. is to bring about an increase in the graft yield. Above this concentration grafting decreases sharply. The rate of grafting increases with increase of temperature. The use of various water soluble solvents effects the percentage of grafting considerably. The alkali solubility of the grafted fiber has been investigated.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050850103
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  • 5
    Electronic Resource
    Electronic Resource
    Aqueous polymerization of acrylonitrile initiated by the bromate-thiourea redox system (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 16 (1978), S. 343-351 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The aqueous polymerization of acrylonitrile initiated by an acidified bromate-thiourea redox system has been studied under nitrogen atmosphere. The rate of polymerization is independent of thiourea concentration over the range 2-9 × 10-3M and reaches maximum at 9 × 10-3M. The rate varies linearly with [monomer]. The initial rate of polymerization as well as the maximum conversion increases within the range of 4-22.5 × 10-3M KBrO3, but beyond 22.5 × 10-3M the rate of polymerization decreases. The initial rate and the limiting conversion increases with increasing polymerization temperature in the range 30-45°C; and beyond 45°C they decrease. The effect of certain neutral salts, water-soluble solvents, and micelles of cationic, anionic, and nonionic surfactants on the rate of polymerization has been investigated.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.170160204
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  • 6
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto nylon 6. V. Graft copolymerization of methyl methacrylate onto nylon 6 with the tetravalent cerium-thiourea redox system (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 257-261 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200130
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  • 7
    Electronic Resource
    Electronic Resource
    Aqueous polymerization of methyl methacrylate initiated by peroxydisulfate-citric acid redox system catalyzed by silver ion (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 2371-2379 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The kinetics of the aqueous polymerization of methyl methacrylate initiated by potassium peroxydisulfate-citric acid catalyzed by silver ion was investigated in nitrogen atmosphere. The rate of polymerization is proportional to the square root of peroxydisulfate concentration. The initial rate increases with increasing citric acid concentration up to 15 × 10-3M, after which it decreases. The rate of polymerization also increases initially with monomer concentration and decreases at higher monomer concentration. The effects of temperature and the addition of some solvents and salts on the rate of polymerization have also been studied and a suitable kinetic scheme has been proposed for the reaction.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200902
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  • 8
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto wool fibers. III. Graft copolymerization of methyl methacrylate onto wool using hexavalent chromium ion (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 3425-3434 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of hexavalent chromium to initiate graft copolymerization of methyl methacrylate onto wool fibers has been investigated. The rate of grafting was determined by varying monomer, chromium(VI), temperature, acidity of the medium, nature of wool, reaction medium, and redox system. The graft yield increases with increasing monomer concentration up to 0.65M, and, with further increase of monomer the graft yield decreases. The graft yield increases with increasing chromium(VI) concentration. The grafting is considerably influenced by chemical modification of wool prior to grafting. The effect of certain inorganic salt and anionic surfactant on the rate of grafting has been investigated. The graft yield is influenced by thiourea concentration; it decreases with increasing thiourea concentration.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.170171102
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  • 9
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto nylon 6. III. Graft copolymerization of methyl methacrylate onto nylon 6 using the Fe3+ -thiourea redox system (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 831-834 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190321
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  • 10
    Electronic Resource
    Electronic Resource
    Grafting vinyl monomers onto silk fibers. XIV. Graft copolymerization of methyl methacrylate onto silk using peroxydiphosphate - ascorbic acid redox system (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 3511-3514 
    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: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070261031
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