Validation of an Extended Kinetic Model of Free-Radical N-Vinylpyrrolidone Polymerization

摘要

To predict the polymer properties produced by free-radical polymerization ofN-vinylpyrrolidone (NVP) in aqueous solution a detailed kinetic model hasbeen developed. The kinetic model allows to calculate the chain lengthdistribution, the number of branching points, and the number of terminaldouble bonds (TDB). The latter is accounted for since TDBs are a preconditionfor branching. While monomer conversion can be predicted sufficiently usingindependently determined rate constants for propagation and termination,here the predictions of structural properties by a newly developed extendedkinetic model to experimental findings are compared. Polymer produced in acontinuous stirred tank reactor is analyzed by gel permeation chromatography(GPC), field flow fractionation (FFF), and high-pressure liquidchromatography (HPLC).