Molecular Weight Characterization of Wholly Para-Oriented, Aromatic Polyamide-Hydrazides and Wholly Aromatic Polyamides
- 1 January 1973
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science: Part A - Chemistry
- Vol. 7 (1), 187-200
- https://doi.org/10.1080/00222337308061138
Abstract
A series of Monsanto Co.'s X-500 class, wholly para-oriented, aromatic amide-hydrazide polymers having molecular weights between 25,000 and 65,000 has been characterized by viscometry and light scattering in DMSO solution. Viscosity measurements are not complicated by degradation, polyelectrolyte effect, or shear corrections in this molecular weight range where intrinsic viscosities ([η]) are 3-8 dl/g. The viscosity-molecular weight relationship is Relationships among specific, inherent, and intrinsic viscosities, viscosity-average molecular weight (Mv), and weight-average molecular weight are derived.Keywords
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