Effect of tetrabutylammonium salts of polyhydroxo-substituted derivatives of the closo-dodecaborate anion on thermal-oxidative aging of polyurethane elastomers
DOI:
https://doi.org/10.7242/2658-705X/2026.2.9Keywords:
polyurethane, elastomers, accelerated thermal aging, physico-mechanical properties, closo-dodecaborate anion derivativesAbstract
This article presents data on thermal-oxidative aging of samples of cast polyurethane elastomer based on oligoesters with new boron-containing thermal closo-dodecaborate anionbased stabilizers in the temperature range from 90 to 120°C, including tensile strength and relative modulus. Methods for synthesizing anhydrous tetrabutylammonium salts of di-, tri-, and polyhydroxo-substituted derivatives of the closo-dodecaborate anion are presented. An analysis of changes in elastomer strength during aging under atmospheric conditions made it possible to evaluate the corresponding patterns of structural changes in the studied materials depending on the additive used. Tetrabutylammonium 1,7-dihydroxo-closo-dodecaborate has been proven to be the most effective heat stabilizer. The use of standard methods for numerically assessing changes in aging strength allowed us to obtain the calculated values of the service life for the studied materials in the temperature range up to 90°C.
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