Abstract
This study aims to identify the composition of the pyrolysis products obtained through pyrolysis in the structure of different auxetic designs. Two design specimens of auxetic nano-carbon fibers with different directional load were fabricated, solid carbon fibers and hexagonal auxetic carbon fibers. The deformation behavior is well-known and has been analyzed. 3D finite element (FE) models were used to investigate both structures. There was some impact on the specimens used, and the behavior of the strain and stress line was captured. The main purpose of the experiment was to define and test the auxetic structure's use in industries that require nano-carbon fiber material that has excessively good mechanical and thermal properties. In order to prevent the deterioration of the properties caused by this phenomenon, sizing of the yarns and bundles was carried out. Moreover, to form a sizing coating on the elementary fibers, DMA tests have been conducted, and both the thermal and mechanical properties investigated. In this case, the sizing agent must be in a sufficiently softened state. The compositions can improve nano-carbon vs the adhesion of the polymer matrix for auxetic nano-carbon fibers, which allows the use of such fibers for the reinforcement of plastics without extra processing.