Synthesis and Investigation of the Dielectric Properties of Polyamide–Titanium Hybrid Nanocomposites

A series of hybrid nanocomposites was prepared by sol-gel processing a lysine-modified organotitanium monomer into a polyamide host, with the titanium loading varied across the batches. Structural analysis relied on Fourier-transform infrared spectroscopy (FTIR), while differential thermal analysis, differential scanning calorimetry, and thermogravimetric analysis collectively mapped the thermal stability and heat-response profile. High-resolution scanning electron microscopy (SEM) verified the dispersion quality of the titania phase throughout the polymer matrix. Frequency-dependent permittivity measurements further revealed that signalling frequency and TEOT content intertwine in shaping the dielectric fingerprint. Data indicate that moderate titanium incorporation shifts the polyamides’ dielectric constant upward, hinting at its emergent suitability for capacitive-device use. The polymer designation Lys-PA-1 exhibited the most elevated glass transition temperature, recording a Tg of 190 °C; conversely, Lys-PA-5 displayed the lowest glass transition at 125 °C. Thermogravimetric analysis later indicated that Lys-PA-1 retained the largest residual ash, measuring 24.4, while its Lys-PA-5 counterpart held just 2.0 of that solid fraction. Dielectric measurements identified Lys-PA-1 as the sample with the weakest effective permittivity. Collectively, these data sets advance the ongoing effort to engineer next-generation high-performance dielectric materials.