This study demonstrates improved flame retardancy and thermal stability in PMMA/SiO2-g-PMMA composites, suggesting their potential in fire safety applications.
This study addresses these limitations by preparing PMMA/SiO 2 -g-PMMA/TPP composites via melt blending and utilizing the synergistic effect between SiO 2 -g-PMMA and TPP. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) confirmed the successful synthesis of SiO 2 - g -PMMA with effective grafting. Fire safety tests revealed that increasing triphenyl phosphate (TPP) content in the PMMA5SiO 2 - g -PMMA system significantly improved flame retardancy, with reduced heat release, increased limiting oxygen index (LOI), and achieved vertical burning (UL-94) ratings, demonstrating a synergistic effect superior to TPP alone. Thermal stability was enhanced, as shown by increased decomposition temperatures and residual char, attributed to promoted char formation. Additionally, the composites retained good transparency due to matched refractive indices and uniform dispersion of SiO 2 -g-PMMA.
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Wang et al. (2025) studied this question.
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