Properties and Performance of Epoxy Resin/Boron Acid Composites

Author:

Rudawska Anna1ORCID,Frigione Mariaenrica2ORCID,Sarcinella Antonella2ORCID,Brunella Valentina3ORCID,Di Lorenzo Ludovica3ORCID,Olewnik-Kruszkowska Ewa4ORCID

Affiliation:

1. Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

2. Department of Innovation Engineering, University of Salento, Via Arnesano, 73100 Lecce, Italy

3. Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy

4. Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarin 7 Street, 87-100 Toruń, Poland

Abstract

This research study focused on the effect of adding boric acid to epoxy resin in order to obtain a composite material with improved properties and performance. To this end, a fine powder of boric acid (H3BO3) was introduced into epoxy resin in different amounts, i.e., 0.5 g, 1.0 g, and 1.5 g. As the matrix of the epoxy composites, styrene-modified epoxy resin based on bisphenol A (BPA) (Epidian 53) was used. It was cross-linked with two types of curing agents, i.e., an amine (ET) and a polyamide (PAC). The mechanical properties of the obtained epoxy composites (in terms of compressive strength, compressive modulus, and compressive strain) were determined at room temperature in order to assess the effect of the addition of boron acid and of the type of curing agent employed to cure the epoxy on these characteristics. Calorimetric measurements were made to highlight any changes in the glass transition temperature (Tg) as a result of the addition of boric acid to epoxy resin. Finally, flammability tests were performed on both Epidian 53/PAC and Epidian 53/ET epoxy composites to analyze their fire behavior and consequently establish the effectiveness of the selected additive as a flame retardant.

Publisher

MDPI AG

Reference62 articles.

1. Lee, H.L., and Neville, H. (1988). Handbook of Epoxy Resins, McGraw-Hill.

2. Pertie, E.M. (2006). Epoxy Adhesive Formulations, McGraw-Hill.

3. Chemistry, Formulation, and Properties of Adhesives;Licari;Adhesives Technology for Electronic Applications,2011

4. Synthesis of a Novel Flame Retardant Containing Phosphorus, Nitrogen, and Silicon and Its Application in Epoxy Resin;Fang;ACS Omega,2021

5. Epoxy resins thermosetting for mechanical engineering;Sukanto;Open Eng.,2021

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