Polyamide 6‐based thermoplastic vulcanizate for thermostability: An experimental and theoretical investigation

Abstract

In engineering cases, nonuniform temperature and pressure loads will cause greater thermal stress and deformation of the structure. The creep of materials will also accelerate with the increase of temperature, which greatly reduces the service life of parts. This study improves the vulcanization effect and twophase compatibility of polyamide 6-based thermoplastic vulcanizates (TPV), and the elastic modulus of the material was increased to resist deformation and creep. The compatibility and mechanical properties of the materials were analyzed by dynamic thermodynamic analysis. The temperature and stress of charge air pipe are numerically calculated by fluid-thermal-solid coupling. The results show that at 120 C, the strain of TPV is less than 3%, and no plastic deformation occurs. Based on the principle of time-temperature superposition, the long-term creep behavior at reference temperature is predicted by stepped isothermal method through short-term temperature rise creep experiment. The creep strain after 10 5 h at 60 C of TPV grafted by maleic anhydride (TPV-g-MAH) is only 2.8%, indicating that it has good durability in the application of charge air pipes.

On the injection molding of thick‐walled thermoplastic vulcanizates: linking static and dynamic mechanical properties with morphology

“…First, it can be observed that the shD41 TPV has a much lower EPDM volume fraction than the shA60 TPV, which is correlated with their hardness values. 32,33 Moreover, it is interesting to note that there is no significant variation in the EPDM volume fraction along the thickness of the injection molded thick-walled TPVs, regardless of their hardness.…”

Bio‐based polylactic acid or epoxy natural rubber thermoplastic vulcanizates with dual interfacial compatibilization networks

“…At the same time, compared with traditional rubber or elastomer, TPV have comprehensive mechanical properties and low processing cost. [ 2 ]…”

“…At the same time, compared with traditional rubber or elastomer, TPV have comprehensive mechanical properties and low processing cost. [2] In recent years, biodegradable elastomers have been valued in academic research and industrial applications in light of the growing awareness of natural environmental protection and energy crisis. [3][4][5] Polylactic acid (PLA) has become a shining star in the field of various environmentally friendly polymers because of its strong mechanical properties, as well as its biodegradable and recyclable characteristics.…”