It is the consensus of opinion in the literature that the T-50 test is reliable, sensitive and easy to perform. The present analysis of the T-50 test, compared with other methods for determining state of cure, indicates it to be more sensitive and consistent than stress-strain data and easier to perform than sulfur analyses. In addition it seems to be a more constant function of state of cure than combined sulfur, and detects other factors contributing to state of cure which, for convenience and lack of a true understanding of their exact nature, may be referred to collectively as “vulcanization potential”. Plotting the logarithm of T-50, expressed as absolute temperature, against the logarithm of the time of cure seems to hold interesting possibilities for future study.

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