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Instrumented impact of polymeric materials as a function of temperature and in sheet form is a useful tool for characterizing the toughness behavior of the materials in end-use applications.
The methods employed are fast and provide more information than do the classical determinations such as the Izod and Gardner impact tests. Examples of how the load-time and energy-time traces can be used in conjunction with temperature studies to determine ductile-brittle transition behavior will be illustrated.
In addition, the effect of fabrication and flow patterns on impact response and the effect of specimen thickness on impact are discussed.
impact properties (instrumented), poly (vinyl chloride), poly (acrylonitrile-butadiene-styrene) (ABS), alloy (polymeric), polymer blends, temperature (effect of on impact), thickness (effect of on impact), ductile-brittle transition temperature, method, toughness
Senior research specialist, Central Research-The Plastics Laboratory, The Dow Chemical Company, Midland, Mich.