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Molecules 2012, 17(8), 9090-9103; doi:10.3390/molecules17089090

Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization

1 Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania 2 Instituto Tecnológico de la Energía, Av. Juan de la Cierva, 24 Parque Tecnológico de Valencia, Paterna 46980 (Valencia), Spain 3 Polytechnic University of Timisoara T. Lalescu Street, No. 2, Timisoara 300-223, Romania
* Author to whom correspondence should be addressed.
Received: 13 June 2012 / Revised: 12 July 2012 / Accepted: 24 July 2012 / Published: 31 July 2012
(This article belongs to the Special Issue Phase Transfer Catalysis)
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This paper is directed towards the development of safe, and thermally stable solid polymer electrolytes. Linear phosphorus-containing (co)polyesters are described, including their synthesis, thermal analysis, conductivity, and non-flammability. Polycondensation of phenylphosphonic dichloride (PPD) with poly(ethylene glycol) (PEG 12000) with and without bisphenol A (BA) was carried out using solid-liquid phase transfer catalysis. Potassium phosphate is used as base. Yields in the range of 85.0–88.0%, and inherent viscosities in the range of 0.32–0.58 dL/g were obtained. The polymers were characterized by gel permeation chromatography, FT-IR, 1H- and 31P-NMR spectroscopy and thermal analysis. Their flammability was investigated by measuring limiting oxygen index values. The polymers are flame retardants and begin to lose weight in the 190 °C–231 °C range. Solid phosphorus- containing (co)polyesters were complexed with lithium triflate and the resulting ionic conductivity was determined. Conductivities in the range of 10−7–10−8 S cm−1 were obtained.
Keywords: phase transfer catalysis; solid polymer electrolytes; phosphorus containing (co)polyesters phase transfer catalysis; solid polymer electrolytes; phosphorus containing (co)polyesters
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Iliescu, S.; Augusti, M.-G.; Fagadar-Cosma, E.; Plesu, N.; Fagadar-Cosma, G.; Macarie, L.; Popa, A.; Ilia, G. Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization. Molecules 2012, 17, 9090-9103.

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