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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 1315-1328 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: This paper provides a summary of some of the principal mathematical and theoretical tools for the analysis of experimental data accumulated in the course of the study of true gas phase chain polymerization, using nucleation and growth (in cloud chambers) of liquid monomer drops for detection. Included in the discussion are (1) a theory for the nucleation of supersaturated monomer vapors by single polymer molecules formed from the same monomer, (2) the development of the appropriate stochastics for the growth and transport of the polymers in a variety of experiments involving different configurations of space and time, (3) the development of mathematical methods for determining, from the data, rate constants and critical (for nucleation) polymer sizes, and (4) the development of methods for the extraction of mechanistic information from the noise (fluctuating rate) in the reaction involving only a small number of product molecules. All of these ideas are used in the treatment of experiments reported in the following and subsequent papers.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 1329-1345 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Self-thermal initiated gas phase polymerization in styrene vapor is investigated employing the nucleation and growth of liquid monomer droplets (in supersaturated styrene vapor) for detection. The results show rather definitively that styrene does polymerize thermally, in the vapor phase, at temperatures as low as 250 K. The same is true for α-methylstyrene which is also studied (but not so thoroughly). Phenylacetylene retards the gas phase polymerization of styrene. Polymers with degree of polymerization in the range 9 to 24 are involved in this study. The degree of polymerization increases with temperature and bimolecular termination appears to be absent. The total concentration of growing radicals is of the order of 6×103 cm−3. Thermal initiation appears to have second order kinetics. The rate constant for propagation is the same in the gas as in the liquid. At 0 °C (where we easily observe the formation of polymers), 23 million years would be required to observe the disappearance of monomer by standard methods. This explains why gas phase polymerization of styrene has not been previously conclusively demonstrated, even at high temperatures.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Photochemistry 34 (1986), S. 137-164 
    ISSN: 0047-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Photochemistry 34 (1986), S. 117-135 
    ISSN: 0047-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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