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Condensation polymers containing silicon and germanium in the main chain
Author(s) -
Tagle Luis H.
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200350941
Subject(s) - polymer , germanium , condensation polymer , silicon , catalysis , polymer chemistry , condensation , polymerization , chemistry , phase (matter) , aqueous solution , chemical engineering , nuclear chemistry , materials science , organic chemistry , physics , engineering , thermodynamics
Poly(carbonates), poly(thiocarbonates) and poly(esteres) containing silicon and/or germanium in the main chain were obtained under phase transfer conditions. Polymers were synthesized in a biphasic system NaOH/CH 2 Cl 2 at 20°C using several phase transfer catalysts, and characterized by IR and 1 H and 13 C NMR. The results were evaluated by the yields and the inherent viscosity values. The process was effective observing an increase of both parameters in comparison with the essays without catalyst. The increases depended of the nature of the polymer and the catalyst. In poly(ester) synthesis there was an increase of these parameters when the NaOH concentration was increased due to a salting out effect of the diphenolate from the aqueous phase to the organic one. Also poly(amides) containing silicon or germanium were synthesized by solution polymerization.