Mechanical and Rheological Study of Reduced Graphene Oxide Filled Thermoplastic Polyester Elastomer Nanocomposites

Abstract

The study highlights the impact of incorporating reduced graphene oxide Nano sheets (RGO) into thermoplastic polyester elastomer (TPEE) composites of various compositions such as 0.5%,1.0%and 1.5%. The addition of RGO improves the modulus, yield strength, and tensile strength of TPEE. This indicates that RGO act as effective reinforcements in the composite material. Surface functionalization of RGO further enhances its reinforcing effect. This is attributed to improved interfacial interactions between the RGO and the TPEE matrix. Incorporating RGO increases the elongation levels of TPEE, suggesting enhanced elastoplastic and viscoelasticity. This is explained by the formation of a 'ball bearing' structure, where the discrete hard poly (butylene terephthalate) domains of TPEE enrich the surface of RGO. This structure allows for increased deformation ability of the soft continuous poly (tetramethylene glycol) of TPEE during large-scale deformation. Here, the impeding effect of RGO on the deformation of TPEE chain coils plays a dominant role. Overall, the study provides valuable insights into the structural design and control of RGO-filled thermoplastic elastomer composites, particularly regarding mechanical properties, deformation behavior, and the role of surface functionalization. These findings could inform the development of advanced materials with tailored properties for various applications