Summary
Two zeolites that were both silicates of sodium and aluminum but of different pore size were blended into samples of hydroxyl-terminated poly(dimethylsiloxane), which were then end linked into elastomeric networks. Stress-strain isotherms measured in elongation showed that both types of zeolites increased the ultimate properties of the elastomer and were thus effective reinforcing fillers. The one having the larger pore size gave larger increases in the ultimate strength of the elastomers.
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