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Triaryl Pendant Pyridine Core Hydroxyl Terminal Benzoxazine Based Polybenzoxazine-Silica (PBZ-SiO2) Hybrid Nanocomposites

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A new series of polybenzoxazine-silica (PBZ-SiO2) hybrid nanocomposites were developed using hydroxyl terminal benzoxazine monomers (BZ-OH) and TEOS through the in-situ sol—gel method. The formation of hybrid nanocomposites was confirmed by FT-IR. The presence of inter-cross linked silica networks in PBZ-SiO2 hybrids was accounted for their excellent thermal stability and better char yield than those of neat PBZs. The confinement of the mobility of the polymer chain arose from the introduction of silica particles into the polybenzoxazine matrix increased the glass transition temperature of the hybrids. The values of dielectric constant of the nanocomposites were decreased with increased silica content. The reduction in percentage water uptake may be associated with the inherent hydrophobic nature of Si—O—Si network present in the PBZ-SiO2 hybrid systems. The shift in both the absorption and emission wavelength revealed the successful incorporation of silica particles through thermal ring opening polymerization of benzoxazine and TEOS. The molecular level dispersion of SiO2 particles in the polybenzoxazine matrices was evidenced from morphological studies.
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Keywords: Absorbance; Dielectric Constant; Fluorescence; Hydroxyl Terminal Benzoxazine; Morphology; Organic-Inorganic Hybrid Nanocomposites; Sol—Gel Process; Thermal Stability

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Valliammai Engineering College, Kattankulathur, Kancheepuram 603203, India 2: Department of Applied Science and Technology, Anna University, Chennai 600025, India

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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