Abstract
As chemists produce new resins, formulate new products from resins, and test new theories of polymer science, they constantly are seeking novel methods to make and characterize melts, compounds, emulsions, and solutions. In Anaheim, some of those methods were described by various investigators to the Macromolecular Secretariat and the divisions of Polymer Chemistry and of Polymeric Materials: Science & Engineering. For example, the ability of chemists to test new theories about polymers may increase as a result of an improved instrument for dynamic viscoelastic measurements on dilute solutions. The improved multiple lump resonator was built by physical chemistry professor Eric J. Amis and graduate student Dennis W. Hair at the University of Southern California, Los Angeles. Enhanced mechanical design, optical detection system, electronics for data acquisition, and computer control will speed determinations of the dynamic storage modulus, G', and dynamic loss modulus, G, of polymer solutions. G' is a meas...
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