Volume 42, Issue 11 pp. 597-599
Article
Full Access

Dilute solution properties of polyurethane

S. I. Ali

S. I. Ali

Department of Applied Chemistry, University of Karachi, Karachi-32, Pakistan

Search for more papers by this author
S. Ali

S. Ali

Department of Applied Chemistry, University of Karachi, Karachi-32, Pakistan

Search for more papers by this author
First published: November 1991
Citations: 3

Abstract

en

Low angle laser light scattering and viscosity studies were made on dilute solution of fractions of polyurethane prepared from butandiol and hexamethylene diisocyanate. The intrinsic viscosities were correlated to molecular weights by the MARK-HOUWINK-SAKURADA equation. The values of the constants Km and a have been determined. In spite of the low refractive index increment of polyurethane in benzene, molecular weights as low as 4300 could be measured.

Abstract

de

Mittels Kleinwinkel-Laserlichtsreuung und viskosimetrichen Messungen wurden verdünnte Lösungen von Polyurethanfraktionen untersucht. Das Polymer wurde aus Butandiol und Hexamethylendiisocyanat hergestellt. Die Grenzviskositäten wurden über die MARK-HOUWINK-SAKURADA-Gleichung zu den Molekülmassen korreliert. Die Werte der Konstanten Km und a wurden ermittelt. Trotz des niedrigen Brechungsinkrementes von Polyurethan in Benzen konnten Molekülmassen bis herab zu 4300 gemessen werden.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.