The Effect of Vulcanization Temperature on the Properties of Natural Rubber Latex to Prepare the Suturing Training Pad
Keywords:
suturing material, medical training lab, natural rubber, skin simulation, sutureAbstract
This study focuses on the controlled curing method for preparing natural rubber latex as a suturing training pad. Local natural rubber latex was transformed into pre-vulcanized rubber latex using a chemical. The natural rubber sheets were cured at temperatures of 30 ± 2 °C, 40 ± 2 °C, and 50 ± 2 °C for 7 days under controlled conditions. Various properties, including stress-strain curves, hardness, crosslink density, swelling, and crosslinking behavior, analyzed using FT-IR spectra, were examined. The FT-IR spectra indicated a decrease in the signal of the C=C bond and an increase in the C-S bond, demonstrating the crosslinking behavior. As the curing temperature increased, crosslinking also increased, resulting in enhanced stress-strain properties at break, higher Young's modulus, greater strain hardening, and increased hardness. Additionally, crosslink density increased while swelling decreased. A curing temperature of 30 ± 2 °C was selected for preparing the natural rubber sheet for use as a suturing training pad. The performance of this rubber sheet was tested and compared with a commercial silicone skin suture practice sheet. The results showed that no cracking occurred around the pinholes, and the rubber surface could be sutured without tearing. A nylon suture placed on the rubber surface demonstrated a tight closure, similar to that of the silicone skin suture practice sheet.
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