J. Penelle, G. Clarebout, I. Balikdjian
Apr 1, 1994
Citations
0
Influential Citations
2
Citations
Journal
Polymer Bulletin
Abstract
SummaryDiethyl 1,1-cyclopropanedicarboxylate undergoes ring-opening polymerization under anionic conditions. If the cyclopropane is contaminated by diethyl malonate CH2(COOEt)2, polymerization can be initiated by metallic sodium. The mechanism of this initiation was found to involve an initial reduction of the malonate by sodium to give the salt (EtOOC)2CH(-) Na(+) which acts as the real initiator. Poly(diethyl 1,1-cyclopropane dicarboxylate) is soluble in halogenated solvents and was characterized by GPC, IR,1H- and13C-NMR. Molecular weights are low to moderate (typically 103–104) and are compatible with the low monomer/initiator ratios used in these experiments.