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Walker, Jearl – Scientific American, 1990
Describes the necking of polymer sheets that occurs when they are stretched. Discusses the effect and the mechanisms of necking. Lists four references. (YP)
Descriptors: Laboratory Experiments, Laboratory Procedures, Matter, Optics
Peer reviewedRodriguez, F. – Journal of Chemical Education, 1990
Classroom demonstrations of selected mechanical properties of polymers are described that can be used to make quantitative measurements. Stiffness, strength, and extensibility are mechanical properties used to distinguish one polymer from another. (KR)
Descriptors: Chemistry, College Science, Demonstrations (Educational), Educational Experiments
