Investigation of flexural properties of hexagonal boron nitride added thermoplastic composites

Abstract

In this study, weight percentages (wps) of 0%, 0.5%, 2% hexagonal boron nitrides (hBN) were added to 30 wt.% short glass fiber reinforced Polyamide (PA) 66 matrix (GF30) to fabricate the thermoplastic composite materials. The hBN additives were applied by coating of granules of 30 wt.% short glass fiber reinforced PA 66 (GF30) materials. The hBN coated thermoplastic materials were produced by plastic injection method. The effect of different wps of hBNs on the flexural properties of thermoplastic composites were examined in the produced samples. The produced samples were subjected to three-point bending tests. When looking at the results of the three-point bending tests, the highest increase of flexural properties was obtained in the sample of PA66/GF30/2% hBN added thermoplastic composite. The samples with 2 wt% hBN showed the best flexural properties with an improvement of 85 and 52% flexural modulus and strength, respectively, compared to the samples without hBN (PA66/GF30). According to the obtained results of this study, as the percentage of the hBN weight contents increased, the flexural strengths and flexural modulus increased significantly. It was concluded that hBN coated thermoplastic composite samples demonstrated high improvements of flexural properties at optimum rates of hBN.