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  • 1
    Electronic Resource
    Electronic Resource
    Modelling studies of the controlled anionic copolymerization of butadiene and styreneDedicated to Professor Maurice Morton to commemorate the establishment of the Maurice Morton Institute of Polymer Science at the University of Akron. (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 33 (1994), S. 151-159 
    Details
    ISSN: 0959-8103
    Keywords: anionic copolymerization ; modelling studies ; styrene ; butadiene ; polymerization ; 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 anionic polymerization of isoprene with n-butyl lithium and polar modifier such as TMEDA and tripiperdinophosphine oxide were studied and kinetic and reactor models are proposed for these systems. Reactor conversion, molecular weight distribution and polymer glass transition temperature had been calculated from the model and compared favorably to the actual data for various combinations of reactor systems and operating conditions. Simulations of the model can be used to design reactor systems and predict polymer properties of large-scale operations from results of small scale batch reactor runs.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1994.210330205
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  • 2
    Electronic Resource
    Electronic Resource
    The reaction engineering of the anionic polymerization of isoprene (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 47 (1993), S. 1589-1599 
    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 anionic solution polymerization of isoprene with n-butyllithium (n-BuLi) initiator and tetramethylethylenediame (TMEDA) modifier or n-butyllithium (n-BuLi)initiator and tripiperidinophosphine (TPPO) modifier was studied and kinetic and reactor models are proposed for both systems. Reactor conversion, molecular weight distribution, and polymer glass transition temperature had been calculated from the model and compared favorably to actual data for various combinations of reactor system and operating conditions. Simulations of the models can be used to design reactor systems, and predict polymer properties of a large-scale operation from results of small-scale batch reactor runs. © 1993 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070470907
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  • 3
    Electronic Resource
    Electronic Resource
    Relationship between interchain spacing of amorphous polymers and blend miscibility as determined by wide-angle X-ray scattering (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 183-190 
    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 average molecular interchain spacing (〈R〉) in Angstroms for amorphous polymers was calculated from the strong maximum in the wide-angle X-ray scattering (WAXS) diffraction scan using established equations. The half-width (HW) of the maximum was used to qualitatively describe the distribution of 〈R〉. 〈R〉 and HW for immiscible blends corresponded to the weighted average of 〈R〉 and HW of the homopolymers in the blend. 〈R〉 for a miscible blend (natural rubber and high-vinyl PBd) was much larger than the weighted average of 〈R〉 of the component homopolymers, indicating that a new amorphous molecular structure had developed. The larger 〈R〉 for the miscible blend indicates that the molecular chains are spread further apart, resulting in an increase in free volume to accommodate the new packing order. The single Tg of this blend was lower than predicated by the Gordon-Taylor equation.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070430115
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    Paper (German National Licenses)
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