Telechelic oligomers made from ethylene oxide and phosphoric acid. Structure and transformation into organoaluminum polymers

Z. Florjańczyk; A. Lasota; M. Leśniewska-Mizak

Published : 2022-09-01

Vol. 49 No. 6 (2004)

Telechelic oligomers made from ethylene oxide and phosphoric acid. Structure and transformation into organoaluminum polymers

Z. Florjańczyk A. Lasota M. Leśniewska-Mizak

Abstract

The reaction of phosphoric acid with ethylene oxide (EOX) in organic solvents or water has been studied at -5 °C to +30 °C by means of NMR and MALDI-TOF spectroscopy. Linear telechelic oligomers comprising 4-25 ethylene oxide monomeric units and 3 terminal hydroxyl groups were found to be the main products of this reaction. Side products include cyclic esters, condensation products containing 2-3 phosphorus atoms in the chain and oligodiols. The esters are stable at temperatures up to 170 °C; and in water exhibit strong resistance to hydrolysis up to approx. 80 °C. Aqueous medium at 100 °C in presence of aluminum oxohydroxide in the form of boehmite leads to hydrolysis of one ester bond, in situ yielding a diester, which reacts with the boehmite to form hybrid phosphate-alumoxane structures; with molar ratio of P:AI in such polymers of approx. 1.1. A transparent colloidal dispersion with a broad molecular weight spread of the polymer component and low limiting viscosity number (about 0.002 cm3/g) is formed. Lowest molecular weight fractions form true solutions in water and DMSO.

Keywords

kwas fosforowy ; tlenek etylenu ; fosforany oligomeryczne ; bemit ; polimery hybrydowe fosforanowo-alumoksanowe ; budowa chemiczna ; MALDI-TOF phosphoric acid ; ethylene oxide ; oligomeric phosphates ; boehmite ; hybrid phosphate-alumoxane polymers ; chemical structure ; MALDI-TOF

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Florjańczyk, Z., Lasota, A., & Leśniewska-Mizak, M. (2022). Telechelic oligomers made from ethylene oxide and phosphoric acid. Structure and transformation into organoaluminum polymers. Polimery, 49(6), 389–397. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1764

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Z. Florjańczyk evala@ch.pw.edu.pl

Affiliation
Warsaw University of Technology, Faculty of Chemistry, ul. Noakowskiego 3, 00-664 Warszawa

A. Lasota

Affiliation
Warsaw University of Technology, Faculty of Chemistry, ul. Noakowskiego 3, 00-664 Warszawa

M. Leśniewska-Mizak

Affiliation
Warsaw University of Technology, Faculty of Chemistry, ul. Noakowskiego 3, 00-664 Warszawa