Organic–inorganic hybrid boron‐containing phenol–formaldehyde resin/SiO₂ nanocomposites

Abstract

The organic–inorganic hybrid boron‐containing phenol–formaldehyde (BPFR) resin/SiO2 nanocomposites was synthesized in‐situ from boric acid, phenol, and tetramethoxysilane. The structure of BPFR modified and the distributions of silicon element were studied by Fourier‐transform infrared spectroscopy, energy dispersive X‐ray spectrometry, and transmission electron microscope, respectively. The glass transition temperature (Tg) was determined by torsional braid analysis. The results show that silicon element distribution is homogeneous, and the size of nanosilica is about 40–60 nm. The thermal stability and kinetics parameters of thermal degradation were determined by thermogravimetry analysis (TGA). TGA results show that the resin modified has higher heat resistance property when the additive quantity of SiO2 was 3 wt%. The temperature of 5% weight loss is 487.7°C, which is 12.4°C higher than that of common BPFR. The residual ratio of 3 wt% SiO2/BPFR was 62.3% at the temperature of 900°C, which is 11.2% higher than that of common BPFR. The mechanics loss peak Tp of 3% SiO2/BPFR is 33°C higher than common BPFR. Fiberglass‐reinforced BPFR modified by 3 wt% SiO2 has better mechanical and dielectric properties than that of common BPFR. POLYM. COMPOS., 2008. © 2007 Society of Plastics Engineers

Synthesis and thermal stability properties of boron‐doped silicone resin

“…Another difference is that there are two weak absorption peaks at 890 cm −1 and 677cm −1 in curve a, which corresponds to stretching vibration of v BOSi and in‐plane shear vibration of δ BOSi, respectively . These results suggest that boron atom has been successfully doped into the silicone resin chain in the form of SiOB bond by the method of hydrolysis‐polycondensation …”

“…9,11,16 These results suggest that boron atom has been successfully doped into the silicone resin chain in the form of SiAOAB bond by the method of hydrolysis-polycondensation. 7,[17][18][19] Nuclear Magnetic Resonance. The 1 H-NMR spectrogram of PTES, DMDES, and product BSR-1# is shown in Figure 2.…”

Preparation, characterization and properties of fiber reinforced composites using silicon-containing hybrid polymers

“…[5][6][7][8][9][10][11][12][13] The polymers can also be used in the fields of coatings, electron, rocketry, and construction. [14][15][16][17][18] Therefore, these kinds of hybrid materials have good application prospects and research significance.…”

“…Inorganic‐organic hybrid materials have been extensively studied due to their strong chemical bonds like Si‐N, B‐N and B‐O . The polymers can also be used in the fields of coatings, electron, rocketry, and construction . Therefore, these kinds of hybrid materials have good application prospects and research significance.…”

Preparation and characterization of boron-nitrogen coordination phenol resin/SiO2nanocomposites

“…We have reported the synthesis of organic-inorganic hybrid boron-containing phenolformaldehyde resin/SiO 2 nanocomposites, but it is not contained boron-nitrogen coordination structure (Gao et al 2008). Wang D. C. et al had reported the preparation and thermal stability of general boron-containing phenolic resin/clay nanocomposites (Wang et al 2008).…”