Abstract
Vulcanization is an important chemical-thermal process in production of rubber products resulting in change of material properties, increased elasticity and strength. In general, Young’s modulus is used as an indicator of elastic deformation at loading configuration. However, rubber is not truly elastic and a single parameter is insufficient to describe the whole deformation contributed by microstructure of rubber network. Therefore, we present the material parameters concerning the mechanical interaction of rubber constituents. In this study, tensile force and elongation were measured to analyze the rubber deformation. In order to describe the deformation behavior of the combined infrared and hot-air vulcanized rubber glove, the material properties, stress and stretch, were therefore presented. The stress-stretch relationships of the vulcanized rubber gloves were established based on previously well-known hyperelastic material model and their material parameters were determined using a parameter estimation technique. In conclusion, the stress-stretch relationships of the combined infrared and hot-air vulcanized rubber glove can be successfully established with our optimized material parameters; the magnitudes of rubber modulus (CR) and locking stretch (λL) were in a range of 0.041-0.079 MPa and 10.27-70.12, respectively. Furthermore, the resulting material parameters can be properly used to indicate the micro structural deformation.
Highlights
The stress-stretch relationships of the vulcanized rubber gloves were established based on previously well-known hyperelastic material model and their material parameters were determined using a parameter estimation technique
Vulcanization has been known as an important chemical-thermal process of the rubber production which has been discovered by Charles Goodyear in 1843
The Cauchy stresses for each vulcanized rubber glove were determined using Equation (1)-(4) at 300% strain and at break point
Summary
Vulcanization has been known as an important chemical-thermal process of the rubber production which has been discovered by Charles Goodyear in 1843. The vulcanization methods and optimized heating processes of the rubber gloves have been investigated (Makuuchi et al, 1990). The nonhomogenous temperature on the rubber glove during the process causes the non-homogeneous material in the final product. The rubber region where has the low elasticity and strength will damage before the other regions. From this reason, the combined heating, including convection and radiation heat transfer, should be considered as the effective heating process to improve the temperature distribution as well as to determine the new optimized parameters of the vulcanization
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