Abstract
An instrument has been developed to determine the number of chain scissions and energy consumed per unit fracture area. This instrument utilizes a fine dental burr connected to a rheometer. Its motions are such that it grinds off about 4000 Å in height from the polymer films per pass. The first application is to partly annealed polystyrene latex films where it is shown that four regimes of fracture exist as annealing progresses.
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