Beta dielectric dispersion in natural rubber latex

✍ Scribed by Abimbola A. Laogun

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 430 KB
• Volume: 32
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1986.070320527

✦ Synopsis

The dielectric dispersion of natural rubber latex has been investigated over a frequency range of 0.1-100 MHz and at six temperatures from 20" to 70°C. A computer analysis of the dispersion data showed that the Cole-Cole structural equation gave a better fit than the Debye. The large values of the Cole-Cole a spread parameter suggest heterogeneity of structure in rubber latex. The latex viscosity and the relaxation time were both found to be influenced by changes in temperature. Application of the Arrhenius temperature equation to the data yielded a mean activation enthalpy .of 32.6 2 2.8 kJ/mol for the relaxation process.