No abstract

Abstract. The chemical modifications of poly (vinyl chloride) with aliphatic and aromatic alcohols compounds have been investigated at room temperature and atmospheric pressure, catalysed by a new green basic catalyst, the Maghnite-K + . The presence of ether groups in the products is proven by infra red spectroscopy (IR) as well as by nuclear magnetic resonance spectroscopy ( 1 H NMR), and characterized by intrinsic viscosity as well as by gel permeation chromatography (GPC).

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 ( 1 H-NMR) and the existence of cyclic species was proven.

No abstract