I. Obriot, J. Favier, P. Sigwalt
Nov 1, 1987
Citations
0
Influential Citations
14
Citations
Journal
Polymer
Abstract
Abstract The precursor 1,2-bis(isopropenyl-4 phenyl)ethane may react in hexane with tert-butyllithium (tert-BuLi) to yield a difunctional initiator even if the reagents are in stoichiometric amounts. The kinetics of this reaction were investigated at various temperatures. Nuclear magnetic resonance and mass spectrometry show that the concentration of monoadduct remains small during the reaction and that the end product consists only of diadduct. When tert-BuLi is in excess, the two steps of addition can be treated as consecutive pseudo-first-order reactions. The much higher apparent rate constant for the addition of BuLi to the second double bond of the precursor may explain the low proportion of monoadduct.