Epoxy Compositions Modified with Ammonium Polyphosphate and Boric Acid

Abstract:

In this work, we investigated polymer compositions based on epoxy resin cured with polyethylene polyamine and containing ammonium polyphosphate and boric acid as a blowing agent and carbonization stimulator. The UL 94 method was used to determine the ability of a material to burn or extinguish after flame treatment. We determined the ability of the material to burn or extinguish when exposed to a gas burner. Weight loss at characteristic temperatures was determined using a Perkin Elmer STA8000 synchronous DTA / TGA analyzer. The dependence of heat capacity on temperature was determined (calorimeter ITS-400). It has been shown that in modified compositions containing ammonium polyphosphate and boric acid, the heat capacity changes without significant jumps, which is due to a quieter flow of gas formation. The structure of intumescent coatings was studied using atomic force microscopy. The study was carried out on a P4-Solver device NT-MTD. Tests of the samples have shown that the addition of boric acid makes it possible to obtain a more ordered structure of the coke foam, an increase in the heat capacity of intumescent coatings.

• Periodical: Key Engineering Materials (Volume 909)
• Pages: 21-27
• DOI: https://doi.org/10.4028/p-n42c64
• Online since: February 2022
• Authors: Sergey G. Shuklin*, Lyudmila Makarova, Marina Eremina
• Keywords: Atomic Force Microscopy, Calorimeter, Epoxy Compositions, Intumescent Coatings, Synchronous Analyzer

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