Venkataraman Narasimhan, Robert Y. M. Huang, Charles M. Burns
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Determination of polymer-polymer interaction parameters of incompatible monodisperse and polydisperse polymers in solution
Equilibrium phase studies were carried out on the ternary system of polystyrene-poly butadiene-toluene at 23°C and 1 atm. Narrow and broad molecular weight distribution (MWD) samples of polystyrene and polybutadiene were employed, and their binodal curves were established. Expressions were derived to calculate X2i values for both monodisperse (narrow MWD) and polydisperse polymers. Typical interaction parameters determined from (lie experimental data are presented. It is concluded that monodisperse expressions can be used for polydisperse polymers using the number-average molecular weight.
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