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Two Quartz Resonator Methods for the Investigation of the Complex Shear Modulus of Polymers

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Two methods are described and used for investigating the complex shear modulus of polymers in the MHz-region. The double-quartz method works similar to a system of coupled pendulums: two identical quartz resonators (AT-cut) are coupled with a film of specimen. The shear modulus of the test specimen can be determined from the splitting of the resonance into a parallel and an antiparallel mode. In the single-quartz method a quartz crystal is attached to a polymer specimen causing shear waves in the probe. The shear modulus of the polymer can then be calculated from the resulting complex frequency shift of the quartz resonator. The basic theory, the method of evaluating the modulus, and the experimental set-up for obtaining the resonance curves are described. A series of examples illustrates the application of these methods to solid and molten polymers at frequencies from 1 to 15 MHz and temperatures from −150° to +150 °C.
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Document Type: Research Article

Publication date: January 1, 1969

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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