The reactivity of hydroxyl groups in oligoisoprenes obtained by radical polymerization in the C1-C3 alcohol solutions initiated with hydrogen peroxide.

The urethane formation reaction between phenylisocyanate and hydroxyl-containing oligoisoprenes obtained by radical polymerization in the C1-C3 alcohol solutions initiated with hydrogen peroxide has been studied by Fourier transformation IR-spectroscopy. A stepwise change of the reaction rate was discovered during its course, which was explained by structural changing in the oligomer matrix. [ABSTRACT FROM AUTHOR]