Badania nad mechanizmem rozkładu termicznego nienasyconych żywic poliestrowych o zmniejszonej palności

E. Kicko-Walczak

Published : 2022-09-17

Vol. 48 No. 5 (2003)

Studies on the mechanism of thermal decomposition of unsaturated polyester resins with reduced flammability

E. Kicko-Walczak

Abstract

On the basis of experimental results the kinetic dependencies describing the process of thermal degradation of polyester compositions [modified with halogen free fire retardant (Sn/Zn system)] (Figs. 11-13) as well as the mechanism of the process have been characterized. Thermogravimetric methods (TG, Figs. 1-4 and 8-10) including TG coupled either with Fourier transformation infrared spectroscopy (TG-FT-IR, Figs. 6-7) or with mass spectrometry (TG-MS) have been used in the investigations. It has been found that modification of polyesters using Sn/Zn system causes significant limitation of CO2 evolution and moderation of the combustion process because of slowing down the flame propagation as a result of modifier action. It has been established that stabilizing effect of fire retardant is a result of surface spherical barrier formation, which blocks the heat flow from the decomposition zone to the inner layers of a substance. A mechanism of polyester resins thermal stabilization using Sn/Zn system has been proposed.

Keywords

nienasycone żywice poliestrowe ; ograniczenie palności ; bezhalogenowy antypiren Sn/Zn ; metody TG, TG/FT-IR i TG/MS ; kinetyka i mechanizm rozkładu termicznego unsaturated polyester resins ; flammability retardation ; flame retardant (Sn/Zn system) ; TG; TG-FT-IR and TG-MS methods ; kinetics and mechanism of thermal decomposition

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Kicko-Walczak, E. (2022). Studies on the mechanism of thermal decomposition of unsaturated polyester resins with reduced flammability. Polimery, 48(5), 351–358. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1871

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