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Synergistic effect of methyl phenyl silicone resin and DOPO on the flame retardancy of epoxy resins

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Abstract

A series of flame-retarded epoxy resins (EPN) loaded with methyl phenyl silicone resin (Si603) and DOPO (9, 10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) have been prepared. The morphology of these EPN composites were characterized by differential scanning calorimentry (DSC). The mixed epoxy systems all exhibit single glass transition temperature which indicates a homogeneous morphology of these mixed epoxy systems. The thermal stability and flammability of these EPN composites were investigated with limiting oxygen index, UL 94 vertical burning, and themogravimetric analysis tests (TG). The results showed that the DOPO and Si603 system had excellent flame retardancy and antidripping properties for EPN. The TG curves suggested that there was a distinct synergistic effect of DOPO and Si603, and this effect greatly promoted the char formation of the EPN composites and hence improved the flame retardancy. Additionally, the structure and morphology of char residues were studied with Fourier transform infrared and scanning electron microscopy.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China

    Xiao Bao & Xufu Cai

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  1. Xiao Bao
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  2. Xufu Cai
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Correspondence to Xufu Cai.

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Bao, X., Cai, X. Synergistic effect of methyl phenyl silicone resin and DOPO on the flame retardancy of epoxy resins. J Therm Anal Calorim 118, 369–375 (2014). https://doi.org/10.1007/s10973-014-3993-y

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  • DOI: https://doi.org/10.1007/s10973-014-3993-y

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