Layered double hydroxides as transesterificationcatalysts and nanofillers for polyester resin

M. Kędzierski; Z. Bończa-Tomaszewski; G. Jaworska; A. Niska

doi:10.14314/polimery.2015.160

Published : 2015-03-30

Vol. 60 No. 3 (2015)

Layered double hydroxides as transesterificationcatalysts and nanofillers for polyester resin

M. Kędzierski Z. Bończa-Tomaszewski G. Jaworska A. Niska

DOI: https://doi.org/10.14314/polimery.2015.160

Abstract

Saturated polyester resins were prepared by reaction of dimethylterephthalate with alkylene glycols in the presence of layered doublehydroxides (hydrotalcites, HT). The effect of HT composition (cation and aniontypes) on the rate and progress of transesterification was investigated. It was found that zinc-aluminum HT intercalated with anionic form of aminolauric acid[HT(ZnAl)ALA] efficiently catalyzes transesterification process, increasing therate of reaction or lowering its temperature when compared to the reaction with use of conventional organic tin catalyst. The polyester resin obtained in this way is transparent, which along with X-ray diffraction data indicates the delamination of clay layers and formation of nanocomposite. The limitation of using ALA-intercalated HT as an additive for polyesters used in coatings is coloration of the resin with an increase of the reaction temperature above 180°C. Colorless polyester was obtained using more thermally stable hydrotalciteintercalated with ethylenediaminetetraacetic acid, however, at the expense of significantly longer reaction time. Using HT(ZnAl)ALA catalyst a two-step synthesis of carboxyl polyester resin was performed and the obtained product was used as a component of powder coating formulation.

Keywords

layered double hydroxides ; hydrotalcite ; intercalation ; aminolauric acid ; EDTA ; transesterification ; catalyst ; polyester resins ; nanocomposites warstwowe podwójne wodorotlenki ; hydrotalkit ; interkalacja ; kwas aminolaurynowy ; EDTA ; transestryfikacja ; katalizator ; żywice poliestrowe ; nanokompozyty

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Kędzierski, M., Bończa-Tomaszewski, Z., Jaworska, G., & Niska, A. (2015). Layered double hydroxides as transesterificationcatalysts and nanofillers for polyester resin. Polimery, 60(3), 160-166. https://doi.org/10.14314/polimery.2015.160

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M. Kędzierski Michal.Kedzierski@ichp.pl

Affiliation
Industrial Chemistry Research Institute, Department of Polyesters, Epoxide Resins and Polyurethanes, Rydygiera 8 Street, 01-793 Warsaw, Poland

Z. Bończa-Tomaszewski

Affiliation
Industrial Chemistry Research Institute, Department of Polyesters, Epoxide Resins and Polyurethanes, Rydygiera 8 Street, 01-793 Warsaw, Poland

G. Jaworska

Affiliation
Industrial Chemistry Research Institute, Department of Polyesters, Epoxide Resins and Polyurethanes, Rydygiera 8 Street, 01-793 Warsaw, Poland

A. Niska

Affiliation
Industrial Chemistry Research Institute, Department of Polyesters, Epoxide Resins and Polyurethanes, Rydygiera 8 Street, 01-793 Warsaw, Poland