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  • Articles  (4)
  • Chemistry  (4)
  • Biochemistry and Biotechnology
  • Computer Systems
  • Inorganic Chemistry
  • Leguminosae
  • 1980-1984  (4)
  • 1960-1964
  • 1980  (4)
  • Physics  (4)
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  • Articles  (4)
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  • 1980-1984  (4)
  • 1960-1964
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  • 1
    Electronic Resource
    Electronic Resource
    Aqueous polymerization of methyl methacrylate using quinoline-sulfur dioxide complex and tetrahydrofuran-sulfur dioxide complex as initiators (1980)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 181 (1980), S. 1331-1338 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Aqueous polymerization of MMA was kinetically studied using separately two complexes of sulfur dioxide as initiators, namely, quinoline-sulfur dioxide (Q-SO2) complex and tetrahydrofuran-sulfur dioxide (THF-SO2) complex. In each case the initiator exponent was 0,5 and the monomer exponent was 1,5. Kinetic data, inhibitory effect of hydroquinone, and incorporation of sulfoxy end groups in the polymers indicate a radical mechanism of polymerization with first order dependence on monomer for the rate of initiation while termination appears to take place bimolecularly.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1980.021810613
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cationic vinyl polymerization by the initiator system diethylzinc/phosphoryl chloride (1980)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 181 (1980), S. 1629-1635 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Et2Zn in combination with POCl3 induces the cationic polymerization of isobutyl vinyl ether and N-vinyl carbazole at ambient temperature. The rate is directly proportional to [Et2Zn]. [POCl3] up to a mole ratio of unity of the components, and thereafter it decreases. At a fixed ratio of [Et2Zn]/[POCl3] the rate is second order in [Isobutyl vinyl ether]. Rate and [η] decrease in the presence of basic additives, pyridine, and water. Unlike the system Et3Al/POCl3, the present combination does not lead to any stereoregular poly(isobutyl vinyl ether) at ambient or lower temperatures. A cationic mechanism is proposed and an appropriate kinetic scheme is suggested.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1980.021810807
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of hydrofuramide on network structure and kinetics of thiuram vulcanization (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 1263-1271 
    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 hydrofuramide (a reaction product of furfural and ammonia) on the network structure and overall kinetics of thiuram vulcanization of natural rubber is reported. The nature of the network structure of the thiuram vulcanizates in the presence and absence of hydrofuramide was determined using triphenyl phosphine (Ph3P) as a chemical probe. The presence of hydrofuramide produces structural complexity of the vulcanizate. The overall kinetics of thiuram vulcanization follows a first-order-rate law in the presence as well as in the absence of hydrofuramide. The rate constant increases while the energy of activation decreases in the presence of hydrofuramide.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250701
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  • 4
    Electronic Resource
    Electronic Resource
    Phthalic anhydride-based cation exchange resin from N-vinylcarbazole (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 511-518 
    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 condensation product based on phthalic anhydride and N-vinylcarbazole has been prepared and processed into a sulfonic acid cation exchange resin. The resin produced has been characterized by measuring its total and salt splitting capacities and by studying its thermal characteristics, rate of exchange, and behavior to pH metric titration.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250316
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