THE INFLUENCE OF SUPRAMOLECULAR STRUCTURE ON THE OPTICAL PROPERTIES OF PP + SiO2
H.S. Ibragimova
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ABSTRACT

This study investigates the effect of supramolecular structure on the optical properties of polypropylene (PP) composites filled with nanoquartz silicon dioxide (SiO2). It was found that the addition of SiO2 nanoparticles leads to a decrease in the band gap due to the formation of new trap states or structural defects. The change in the band gap is attributed to electronic interactions at the polymer–filler interface and structural rearrangement of the polymer near the surface of the nanoparticles. Cooling conditions significantly influence the supramolecular structure of the PP+SiO2 composite, leading to variations in its optical behavior. Slow cooling promotes crystallization and causes a redshift in the absorption spectrum, while rapid cooling increases amorphousness and results in a blueshift. By tuning the band gap and the supramolecular structure, it is possible to design materials with desired optical characteristics for various applications. The reduction in band gap with increasing nanoparticle content enhances the electrical conductivity and photoactivity of the material, making it suitable for use in sensors, photocatalysts, and electronic devices.

Keywords: supramolecular structure, band gap, rapid cooling, slow cooling.
DOI:10.70784/azip.1.2025245

Received: 20.05.2025
Internet publishing: 18.06.2025    AJP Fizika E 2025 02 en p.45-48

AUTHORS & AFFILIATIONS

Institute of Physics, Ministry of Science and Education, 131 H. Cavid Avenue, Baku, AZ 1073, Azerbaijan
E-mail: hicran90@rambler.ru

Graphics and Images

        

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