Cyclic polyesters prepared by poly(oxypropylene oxymaloyl) ring-chain reactions
M. I. Ferrahi, M. Belbachir
Vol. 1., No.1., Pages 24-26, 2007
DOI: 10.3144/expresspolymlett.2007.5
DOI: 10.3144/expresspolymlett.2007.5
Corresponding author: M. I. Ferrahi 
GRAPHICAL ABSTRACT
ABSTRACT
The synthesis of cyclic polyesters of poly(oxypropylene oxymaloyl) from a ring-chain reaction was carried out at 40°C with 'Maghnite' an acid exchanged montmorillonite as acid solid ecocatalyst (Mag–H+). 'Maghnite' is already used as catalyst for polymerization of many vinylic and heterocyclic monomers [1]. The effect of amount of catalyst on yield and molecular weight of polymer was studied.
A typical reaction product was analyzed by gel permeation chromatography (GPC) as well as by nuclear magnetic resonance spectroscopy (1H-NMR) and the existence of cyclic species was proven.
A typical reaction product was analyzed by gel permeation chromatography (GPC) as well as by nuclear magnetic resonance spectroscopy (1H-NMR) and the existence of cyclic species was proven.
