Abstract
When using a number of methods to study kinetics and structural features of the formation of crosslinked polyurethanes in a system containing surface-active substances (SAS) it was found that the presence of the latter causes a marked change in reaction rate, the size of microheterogeneities formed during solidification, degrees of conversion at which crosslinked gel-formation begins and an polymer morphology. Results of investigations suggest that the effect of SAS on crosslinking is observed at the initial stage of gel-formation and involves the localization of SAS in the interfacial range, which separates microvolumes with a developed three-dimensional network from the overall reactions mass.
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