The quantitative characterization of nylon 66 of various polydispersities has been carried out by gel permeation chromatography (GPC), using m‐cresol solvent at 130°C. A Q‐factor value of 13.9 for nylon 66 has been validated, by limiting viscosity‐number determinations for the particular solvent/temperature combination described above. Using this value together with a simple correction technique for viscous fingering and unsymmetrical dispersion, the practical quantitative characterization of linear nylon 66 has been achieved. Construction of a universal calibration curve, based on hydrodynamic volume, gave a straight‐line relationship for polystyrene fractions and nylon 66 samples covering a broad range of polydispersity values.
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M. A. Dudley (1972) studied this question.
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