Performance evaluation of boron-based particles as filler for thermoplastic polyester elastomer

The objective of this study is to enhance the fundamental structural characteristics of thermoplastic polyester elastomer (TPEE) material. For this purpose, two distinct boron-based particles, namely boric acid (BA) and hexagonal boron nitride (hBN), were utilised as reinforcing materials. The production of boron-based particle-reinforced TPEE matrix composites was achieved through the process of extrusion and injection molding. The investigation of the wear behavior of the composites was conducted through the implementation of adhesive wear tests, while the mechanical properties were analyzed through the execution of tensile and three-point bending tests. Furthermore, the thermal properties were examined through the utilization of differential scanning calorimetry and thermogravimetric analysis. The findings of the study indicate that the coefficient of friction values of the TPEE decreased with the addition of both BA and hBN. The incorporation of both BA and hBN into TPEE, as well as an increase in the weight ratio of these particles, resulted in a notable enhancement in tensile strength, elastic modulus and flexural stress at yield values. The addition of BA to TPEE resulted in an increase in the crystallization of the TPEE matrix, while the addition of hBN to TPEE led to a reduction in the crystallization of the TPEE matrix. The incorporation of both BA and hBN elevated the decomposition temperatures of the TPEE, thereby enhancing its thermal stability. However, hBN demonstrated superior performance compared to BA, potentially due to its lower particle size distribution. Nevertheless, it was concluded that, depending on the intended application of the end product, both types of particles can be effectively utilized to enhance the performance of TPEE.