The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The hardness of rubber is connected to its elastic modulus. However, a nonlinear relationship between these characteristics is a common disadvantage of all conventional methods of measuring hardness of rubbers. That is, hardness values do not give adequate information about the real rigidity of rubbers and rubber products. Low sensitivity methods for measuring hardness of hard rubbers is due to...
Most methods used for measuring hardness of rubbers are not sensitive enough for rigid rubbers. If the hardness changes several degrees, the real rigidity/Young's modulus changes several times. This is valid also for ISO 48-H, which was specially developed for rigid rubbers. The problem can be solved by using a method with constant penetration of the indentor into the test piece. In this case...