Kinetics of ring-opening

Yu Y, Storti G, Morbidelli M. Kinetics of ring-opening polymerization of L,L-lactide. Industrial Eng Chem Res 2011 50(13) 7927—40. 

Weber, E., and Vogtle, E, Crown-type compounds—an introductory overview, in Host-Guest Complex Chemistry, Vogtle, E, Ed., Springer Verlag, Berlin, 1981, 11. Hemery, E, Warzelhan, V, and Boileau, S., Kinetics of ring opening of propylene sulfide. 1. Alkali metal and cryptated metal carbonyl. Polymer, 21, 77, 1980. 

Simultaneous polymerization of a mixture of cyclosiloxanes gives polymers whose microstructure is not easily predictable. Typically, the kinetics of ring-opening copolymerization is analyzed in terms of the Mayo-Lewis copolymerization equations (Scheme 5). The aim of such analysis is to determine the Mayo-Lewis reactivity ratios rD = feDD/feox and rx = fexx/fexD, which define the composition of a copolymer." The task is relatively easy when the propagation reactions are irreversible. 

The preparation of ci5-[Co(en)2(j8-alaO)]l2 has been described and the kinetics of ring opening in acidic solution studied. Further studies have indicated that the kinetics may be in error, due to spectral changes associated with the oxidation of the iodide counterion occurring in the nitric acid solutions employed for the kinetic measurements. 

I 7 Thermodynamics and Kinetics of Ring-Opening Polymerization 1.2.2.2 Monomer-Polymer-Solvent Interactions... 

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