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S. Firlik, W. Skupiński, Z. Wielgosz, J. Stasiński

Application of the copper(II)-aminosilane catalysts in the oxidative

polymerization of 2,6-dimethylphenol

Polimery 2015, No 6, 372


DOI: dx.doi.org/10.14314/polimery.2015.372

Summary

The aim of this work was to examine the aminosilane ligands for the copper(II) salts and their application as catalysts for the oxidative polymerization of 2,6-dimethylphenol leading to poly(2,6-dimethyl-1,4-phenylene ether) (PPE) [also known as poly(phenylene oxide) (PPO)] formation. As aminosilane ligands, silane derivatives containing primary and/or secondary amino groups were tested. Among aminosilanes used, PPE was only obtained when N-methylaminopropyltrimetoxysilane (MAPTMS) as a ligand for copper(II) was used. CuCl2 and CuBr2 were compared as catalyst precursors for 2,6-dimethylphenol polymerization and influence of N/Cu molar ratio in the range from 80 to 160 on PPE yield and its Mw was tested. It was observed, that with increasing N/Cu molar ratio from 80 to 120, both PPE yield and Mw increased. PPE with the highest Mw was obtained when CuBr2-MAPTMS as acatalyst was used. At N/Cu molar ratio equal to 160, a decrease in PPE Mw obtained with use of both precursors and decrease in PPE yield for CuCl2-MAPTMS catalyst were noticed. The condensed nanoorganosilicon particles of spherical shape well dispersed in PPE were determined in the polymer matrix. The UV-Vis studies showed that, strong ligand field of the aminosilane ligand easier electron transfer from monomer to Cu(II) and thus polymerization facilitate.


Keywords: poly(phenylene oxide), poly(2,6-dimethyl-1,4-phenylene ether), oxidative polymerization, 2,6-dimethylphenol, aminosilane
e-mail: sebastian.firlik@ichp.pl

S. Firlik, W. Skupiński, Z. Wielgosz, J. Stasiński (889.1 KB)
Zastosowanie kompleksów Cu(II)-aminosilan jako katalizatorów polimeryzacji utleniającej 2,6-dimetylofenolu