Patent ID: 6294388
Filing Date: 2001-09-25
Classification: B01D,B01J,C40B,G01N,Y10T

Abstract:
A method for preparing a composition for calibrating polymer characterization systems for characterization of a target polymer sample, the method comprisinginjecting a plurality of target-polymer standards into a polymer characterization system, each of the plurality of target-polymer standards having a different known molecular weight and having a polydispersity index of more than about 1.10,detecting the hydrodynamic volume of each of the injected target-polymer standards,injecting a plurality of narrow-band polymer standards into the polymer characterization system, the narrow-band polymer standards comprising polymer molecules having a different repeat unit than polymer molecules of the target-polymer standards, each of the injected narrow-band polymer standards having a different known molecular weight and having a polydispersity index ranging from about 1.00 to about 1.10,detecting the hydrodynamic volume of each of the injected narrow-band standards,selecting narrow-band standards having a hydrodynamic volume substantially equivalent to the hydrodynamic volumes of the plurality of target-polymer standards, and forming a composition comprising the selected narrow-band standards.