The present work describes the synthesis of a novel cardanol based benzoxazine monomer (CBz) from renewable resource of cardanol using caprolactamdiamine (CPLDA) by a solventless method. Thiol functionalized mesoporous silica (TSBA-15) was incorporated into cardanol based benzoxazine matrix (PCBz) and the structure of TSBA-15/PCBz was confirmed by FT-IR and NMR analysis. Surface morphology of TSBA-15/PCBz was determined by SEM and TEM techniques. From the TEM results, it was observed that the dispersion of thiol functionalized mesoporous silica in to PCBz forms a fibrous material, which imparts free volume. Thermal properties were studied by DSC and TGA analysis. From the results, it was noticed that the enhanced thermal properties were observed with varying the weight percentage of TSBA-15 material. Dielectric data obtained from impedance analyzer shows that the TSBA-15/PCBz composites have lower values of dielectric constant, and dielectric loss. These above results conclude that TSBA-15/PCBz composites obtained from a renewable waste cardanol finds application as electrical resistance material in microelectronic applications.

In this work, phosphazene modified imine was prepared and its molecular structure was confirmed using FTIR and 1 H NMR analysis. The modified phosphazene imine (PZ imine) of different weight percentages was incorporated into DGBEA epoxy resin to obtain composites and the formation of composites was confirmed by FTIR analysis. The composites were subjected to thermal, radiation resistant, electrical, and antibacterial studies. Data resulted from thermal, UV absorption, antibacterial, and surface behavior studies indicate that PZ imine reinforced epoxy composites possess higher thermal stability, enhanced zone of inhibition, better UV shielding, improved hydrophobic behavior and lower value of dielectric constant than those of neat epoxy matrix.

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In the present work, allyl-terminated benzoxazine and thiol-functionalized polyhedral oligomeric silsesquioxane (SH-POSS) were synthesized and their molecular structures were confirmed by Fourier transform infrared, proton nuclear magnetic resonance (NMR), carbon-13 NMR, and silicon-29 NMR spectroscopies. The PBZ hybrid composite materials were developed through photopolymerization (ultraviolet (UV) lamp) reactions of allyl-terminated benzoxazine monomer with different weight percentages of SH-POSS (P10, P30, and P50 wt%), followed by thermal curing. The data obtained from transmission electron microscopy and X-ray diffraction analysis infer the presence of homogeneous morphology of the cured samples. Data obtained from differential scanning calorimetry, thermogravimetric analysis, UV transmittance, dielectric, and contact angle studies indicate that the dual cured P50-PBZ hybrid composite exhibits higher thermal, UV shielding, and hydrophobic behavior and lower value of dielectric constant than those of lower weight percentages of SH-POSS reinforced hybrid composites.

In the present work, benzoxazine was synthesized using caprolactam amine and cardanol, and its molecular structure was confirmed with FTIR and NMR spectroscopic techniques. Alumina (Al 2 O 3) and titania (TiO 2) were functionalized using 3-aminopropyltrimethoxysilane (APTMS). The nanocomposites were developed by reinforcing with varying weight (1, 3, 5, and 7) percentages of functionalized Al 2 O 3 (F-Al 2 O 3) and functionalized TiO 2 (F-TiO 2) with benzoxazine. The developed nanocomposites (F-Al 2 O 3 /CPBz and F-TiO 2 / CPBz) were characterized from their thermal, dielectric, and UV shielding studies. Data obtained from thermal studies show that 7 wt% of F-Al 2 O 3-reinforced cardanol-based polybenzoxazine nanocomposite exhibits higher thermal stability than that of 7 wt% F-TiO 2-reinforced cardanol-based polybenzoxazine nanocomposite. Dielectric and UV shielding studies show that 7 wt% F-TiO 2 nanocomposite show higher value of dielectric constant (10.2) and UV shielding value (93%) than those of neat and other weight percentages of F-Al 2 O 3 and F-TiO 2 reinforced composites.