Is there a test to predict compatibility of Cloisite® nanoclays?
We are not aware of a simple test to predict which Cloisite® is compatible with different polymers and rubbers. A swelling test can be used for liquids as an initial screen. A general procedure is to add 0.1g of Cloisite® nanoclay to 10cc of a liquid in a 10cc graduated cylinder. Monitor the rate of settling and let the mixture sit for about 24 hours then measure the volume of Cloisite® in the bottom of the graduated cylinder. More detailed information can be obtained by using high shear to disperse the Cloisite® in a liquid and measuring the viscosity at three different shear rates. The higher viscosity result indicates a higher degree of network built (usually associated with a higher degree of exfoliation) when comparing different Cloisites® in a liquid.
