Open Access

ARTICLE

Study on Flame-retardant Mechanism of Epoxy Resin containing Polyvinylphenylsilsesquioxane

by

School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, China

* Corresponding Author: e-mail:

Journal of Polymer Materials 2019, 36(4), 381-389. https://doi.org/10.32381/JPM.2019.36.04.7

Abstract

In this study, a novel flame retardant polyvinylphenylsilsesquioxane (PVP) was added into epoxy resin (EP) to prepare EP/PVP (FREP) composites. The results of cone calorimeter measurement showed that in comparison with virgin EP, the peak heat release rate (PHRR) and total heat release (THR) of FREP were reduced by 27.3% and 10.4%, respectively. Moreover, the thermal degradation behavior of FREP was studied by the Kissinger and Ozawa-Flynn-Wall methods. The results suggested that the addition of PVP greatly enhanced the thermal stability of EP in the final stage, which could be attributed to that the branched silicone with vinyl and phenyl accelerated the formation of an insulating carbon layer and improved the flame retardancy of EP composites, because the char layer played an important role for the flame-retardant behavior of polymer system.

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