The Effect of the Isocyanate–Hydroxyl Ratio on the Structure and Properties of Hard Polyurethanes

E. R. Volkova,V. N. Strelnikov, I. A. Borisova,A. I. Slobodinyuk,A. V. Savchuk

Polymer Science, Series D（2018）

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摘要

A comprehensive study has been carried out of the structure and rheological and physicomechanical properties of low-temperature curing polyurethane compositions based on polyisocyanate and a blend of hydroxyl-containing oligomers of different reactivity. The maximum curing rate and strength parameters (tensile strength and Young’s modulus) have been shown to be achieved at the ratio of the reacting groups NCO : OH = 1.1.

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polyurethane composite,structure,strength,deformation,Young’s modulus,rheology,IR spectroscopy

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