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Summary
First, Layered double hydroxide (LDH) was modified by toluene diisocyanate (TDI), 2-hydroxyethyl acrylate (HEA), and LDH-TDI-HEA was prepared. Then LDH-TDI-HEA was modified by vinyl triethoxysilane (VTES), and LDH-TDI-HEA-VTES composites were obtained. Finally, acrylate was modified by LDH-TDI-HEA-VTES, and flame retarded LDH-TDI-HEA-VTES-Acrylate composites were successfully synthesized by in situ polymerization. The structures of LDH, LDH-TDI-HEA, LDH-TDI-HEA-VTES and LDH-TDI-HEA-VTES-Acrylate composites were characterized by Fourier transform infrared spectra, X-ray diffraction, X-ray photoelectron spectroscopy and Scanning electron microscopic. The effect of LDH-TDI-HEA-VTES content on the thermal stability, mechanical properties, adhesion properties and flame retardant properties of LDH-TDI-HEA-VTES-Acrylate composites was studied. At the same time, the thermal stability, mechanical properties, adhesion properties and flame retardant properties of LDH-Acrylate composites and LDH-TDI-HEA-VTES-Acrylate composites were also studied. The experimental results showed that with the increasing of LDH-TDI-HEA-VTES content, the thermal stability, mechanical properties, flame retardant properties, and shear resistance of LDH-TDI-HEA-VTES-Acrylate composites were improved, while the tack and 180 degrees peel strength decreased. When the content of LDH-TDI-HEA-VTES was 7 wt%, the LOI, after-flame time and the UL 94 grade of LDH-TDI-HEA-VTES-Acrylate composites were 27%, 0 s, and V-0, respectively. LDH-TDI-HEA-VTES-Acrylate Composites have good flame retardant properties. At the same time, the flame retardant mechanism of LDH-TDI-HEA-VTES composites was also analyzed.
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Institution福州大学; 中国科学院福建物质结构研究所
