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The Synthesis of Silicon-containing Polyester Directly from SiO2 and Characterization of Its Structure

Published online by Cambridge University Press:  21 March 2011

Jianhua Song ,
Luyi Sun ,
Anhua Liu  and
Kecheng Gong
Jianhua Song
Affiliation:
Polymer Structure & Modification Lab, South China University of Technology, Guangzhou, 510640, P. R., China
Luyi Sun
Affiliation:
Department of Chemistry, University of Alabama, Tuscaloosa, AL 35487, U.S.A. Polymer Structure & Modification Lab, South China University of Technology, Guangzhou, 510640, P. R., China
Anhua Liu
Affiliation:
Polymer Structure & Modification Lab, South China University of Technology, Guangzhou, 510640, P. R., China
Kecheng Gong
Affiliation:
Polymer Structure & Modification Lab, South China University of Technology, Guangzhou, 510640, P. R., China
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Abstract

A new approach to the synthesis of a novel silicon-containing polyester by noncarbothermal method directly from SiO2 was studied. At first, a high reactive pentacoordinate organic silicon compound (KSi(OCH2CH2O)2(OCH2CH2OH)) was prepared by the reaction of the fumed silica with ethylene glycol (EG) and KOH. Then, a novel double hydroxy tetracoordinate silicon monomer (OCH2CH2O)Si(OCH2CH2OH)(OCH2CH2OCH2CH2OH) was synthesized by the reaction of ClCH2CH2OH with reactive pentacoordinate silicon compound. Finally, a silicon-containing polyester was synthesized by low temperature solution condensation between tetracoordinate silicon compound and p-phthaloyl chloride in dimethyl sulfoxide (DMSO). The product was characterized by FTIR, TG, GPC, etc. The IR spectra of polyester exhibited a characteristic strong absorption band for ester carbonyl in the 1722.2cm-1. IR spectra also showed absorption at 1124.6cm-1 due to the O-Si-O group. TG analysis showed its good thermal stability. GPC analysis showed that the number average molecular weight of this siliconcontaining polyester was about ninety thousand.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 661: Symposium KK – Filled & Nanocomposite Polymer Materials , 2000 , KK8.16
Copyright
Copyright © Materials Research Society 2001

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References

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