On the Permeability of Caoutchouc for Various Substances in Acetone Solutions (Classic Reprint) - Hardcover

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Excerpt from On the Permeability of Caoutchouc for Various Substances in Acetone Solutions

In 1866 Payen (2) worked with balloons of rubber,both vulcanized and unvulcanized,which he filled with water and weighed at stated intervals. He found that the water escaped through the unvulcanized rubber about six times as fast as it did through the vulcanized, the exact ratio being 23 to 4. He claimed to have found the rubber,when viewed through a microscope,full of fine holes or pores;and he insisted upon the porosity of the caoutchouc as the explanation of the phenomena.

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