INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Modification of poly(vinyl chloride) with new aromatic thiol compounds. Synthesis and characterization
Autor/es:
RODRIGO NAVARRO, KARINA BIERBRAUER, CARMEN MIJANGOS, EUNATE GOITI, HELMUT REINECKE
Revista:
Journal of Polymer Degradation
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 93 p. 585 - 591
Resumen:
Different thiol compounds were tested for the synthesis of poly(vinyl chloride) (PVC) with halogen groups and the course of the modification
reactions followed under different conditions by NMR spectroscopy and elemental analysis. It is shown that PVC can be modified without
side reactions using 4-fluorothiophenol, 4-chlorothiophenol, 4-bromothiophenol, 3,4-di-fluorothiophenol, penta-fluorothiophenol and pentachlorothiophenol.
The reactivities and final degrees of modification of the different nucleophiles are compared showing that, when the thiolate
salt is preformed, the bromine derivative reacts quicker and higher degrees of modification are reached than with its smaller homologues. On
the other hand, using the thiol compounds in combination with potassium carbonate this order is inverted and highest degrees of modification are
achieved with 4-fluorothiophenol. Glass transition temperatures and thermal stabilities of the new compounds are compared.