Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.20250032
Polímeros: Ciência e Tecnologia
Original Article

Properties of epoxy polymer materials reinforced with boric acid and nano silica

Cuong Huynh Le Huy; An Truong Thanh; Hao Nguyen Nhat

http://dx.doi.org/10.1590/0104-1428.20250032 Polímeros: Ciência e Tecnologia, vol.35, n4, e20250047, 2025
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Abstract

Boric acid (BA) and nano silica (NS) were used to improve the properties of composite materials based on epoxy resin. The structural and thermal characteristics of materials were evaluated by using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TG), Derivative Thermogravimetry (dTG), and Differential Calorimetry (DSC). The mechanical properties of polymer films were evaluated through the parameters of impact strength, flexibility, adhesion, and hardness. The results showed that the content of 4.0 wt% BA increased the impact strength of the epoxy polymer film (increased by 38%) and increased the thermal properties of epoxy composite materials (increased by 14%). Combining 4.0 wt% BA and 1.0 wt% NS, the thermal properties of the epoxy composite polymer material increased by 18.5%. The epoxy coating was reinforced with 4.0 wt% BA and 1.0 wt% NS achived high thermal stability with the strongest decomposition temperature at 494 °C.

 

 

Keywords

boric acid, nano silica, thermal properties, mechanical properties, epoxy coatings

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