Abstract: In a rapid and non-invasive method for characterizing aromatic polycarbonates, fluorescence intensities are determined at least two wavelength ranges and used to calculate a compositional or physical property of the sample. The method is suitable for determining the relative amounts of linear and branched polycarbonates, and it is fast enough to monitor the progress of polymerization reactions.

Abstract: In an exemplary embodiment, the method includes the steps of providing an array of reaction vessels and providing a plurality of homogenous reaction mixtures within the reaction vessels. Each mixture comprises monomers at least partially embodied in a liquid and is provided in an amount sufficient to form a film having a thickness sufficient to allow the reaction rate of the polymerization reaction to be essentially independent of mass transport. Polymerization then takes place in the presence of a catalyst at reaction conditions effective in substantially maintaining the homogeneity of the reaction mixture. In this manner, polymerization can take place quickly and efficiently without stirring the reactants. The method is highly useful for testing reactants, catalysts, and associated reaction parameters.