Abstract
Vulcanization, tensile strength and water-resistance of protein-free natural rubber (PFNR) were investigated in a viewpoint of application to a seal-product. The PFNR was prepared by incubation of high ammonia natural rubber (HANR) latex with urea, sodium dodecyl sulfate and acetone followed by washing with a centrifuge, twice. It was vulcanized with sulfur, zinc oxide, accelerator, stearic acid and anti-aging agent at 150 °C. Optimum vulcanization time and crosslink density were prolonged and lowered by removing proteins, respectively. The resulting vulcanized PFNR was characterized by attenuated total reflection Fourier transform infrared spectroscopy (ATR FT-IR) and nuclear magnetic resonance spectroscopy (NMR). After soaking in water, stress at break of vulcanized HANR decreased, whereas that of vulcanized PFNR did not. The PFNR in water was proved to be superior in the stress at break due to improvement of water-resistance that was a drawback of natural rubber.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
