Polymerization by phase transfer catalysis. 25. Synthesis of polycarbonates and polythiocarbonates derived from diphenols containing germanium and silicon in the main chain

Tagle, LH; Vega, JC; Diaz, FR; Radic D.; Gargallo, L.; Valenzuela P.

Abstract

Polycarbonates and polythiocarbonates derived from diphenols containing Si or Ge, bis(4-hydroxyphenyl)-dimethyl-germane (I), bis(4-hydroxyphenyl)-diphenyl-germane (II), bis(4-hydroxyphenyl)-dimethyl-silane (III), and bis(4-hydroxyphenyl)diphenyl-silane (IV), and phosgene (a) or thiophosgene (b), respectively, were synthesized under phase transfer conditions using several phase transfer catalysts. The results were evaluated by the yields and eta(inh) values, showing that this technique was effective for the synthesis of this kind of polymers. The yields were low compared with those obtained with other diphenols, due probably to the use in this work of stoichiometric amounts of NaOH to avoid the decomposition of the diphenol, which hindered a salting out effect of the diphenolate to the organic phase.

Más información

Título según WOS: Polymerization by phase transfer catalysis. 25. Synthesis of polycarbonates and polythiocarbonates derived from diphenols containing germanium and silicon in the main chain
Título de la Revista: JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
Volumen: 37
Número: 9
Editorial: TAYLOR & FRANCIS INC
Fecha de publicación: 2000
Página de inicio: 997
Página final: 1008
Idioma: English
URL: http://www.tandfonline.com/doi/abs/10.1081/MA-100101136
DOI:

10.1081/MA-100101136

Notas: ISI