Reports

Simultaneous Studies of Reaction Kinetics and Structure Development in Polymer Processing

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Science  17 Feb 1995:
Vol. 267, Issue 5200, pp. 996-999
DOI: 10.1126/science.267.5200.996

Abstract

The simultaneous time-resolved study of structure development and reaction kinetics during polymer processing is an experimental method that has great potential in developing a deeper understanding of the parameters that govern the formation of structure and therefore polymer properties. A combination of synchrotron radiation small-angle x-ray scattering and Fourier-transform infrared spectroscopy experiments have been performed on a series of model segmented block copolyurethanes. These studies confirm that the driving force for structure development in polyurethanes is the thermodynamics of phase separation rather than hydrogen bonding.