Rheological behavior of natural rubber latex in the presence of surface-active agents

✍ Scribed by N. R. Peethambaran; Baby Kuriakose; Manjari Rajan; A. P. Kuriakose

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 350 KB
• Volume: 41
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1990.070410509

✦ Synopsis

The rheological behavior of centrifuged and creamed natural rubber latex concentrates and the effect of surface-active agents such as casein, polyvinyl alcohol (PVA), sodium alginate, and sodium carboxymethylcellulose ( NaCMC ) were studied at different shear rates and temperatures. The study showed that creamed latex, prepared using tamarind seed powder, is more sensitive to shear rate and temperature than centrifuged latex. The pseudoplasticity and viscosity of the latices can be increased by the addition of surface-active agents, and the effect varies with the type of surfaceactive agents. The behavior of the latices toward temperature is also affected by the addition of surface-active agents, and maximum effect is observed for polyvinyl alcohol and least for sodium alginate.