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Intrinsic viscosity and molecular weight measurement of nylon 66 polymers
Author(s) -
Samanta S. R.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070450914
Subject(s) - intrinsic viscosity , polymer , viscosity , polymer chemistry , materials science , relative viscosity , reduced viscosity , nylon 6 , polyamide , light scattering , gel permeation chromatography , molar mass distribution , analytical chemistry (journal) , thermodynamics , chemistry , scattering , chromatography , composite material , optics , physics
Intrinsic viscosity of several nylon 66 polymers in the molecular weight range 25,000–105,000 was measured in hexafluoroisopropanol (HFIP). The experimentally measured viscosity was compared with the data obtained by least‐squares fit of the classical equations of Huggins and Kraemer. The utility of the single‐point viscosity measurement is also discussed and compared with the measured data. The apparent hydrodynamic parameters obtained from the Huggins equation indicate the applicability of HFIP for studying polyamide polymers. The molecular weight of these polymers was also determined by the gel permeation and low‐angle laser light scattering technique (GPC–LALLS). The molecular weight data combined with the viscosity data provide the Mark–Houwink parameters. The agreement between these parameters and the same parameters obtained in tetrafluoropropanol (TFP) is excellent.