Kolosov, Oleg and Suzuki, M and Yamanaka, K (1993) Microscale evaluation of the viscoelastic properties of polymer gel for artificial muscles using transmission acoustic microscopy. Journal of Applied Physics, 74 (10). pp. 6407-6412. ISSN 0021-8979Full text not available from this repository.
Local viscoelastic properties and a micromechanical structure of polymer hydrogel were studied using transmission acoustic microscopy (AM) with a spatial resolution up to 5 mum. Utilizing various amplitude, phase, and pulse techniques provided by the transmission AM, a velocity and an attenuation of the acoustic wave in the local point of the polymer sample as well as a frequency dependence (dispersion) of these values were evaluated in the frequency range from 30 to 320 MHz. Using these facilities a poly(vinylalcohol) polymer hydrogel for the artificial muscle was studied at the succeeding steps of its manufacturing process of cyclic freezing-thawing. It was found that synchronously, with the increase of the compressional elasticity and acoustic attenuation, a micromechanical nonuniformity of the gel also profoundly enhances it. Fiber-like structures of 10-50 mum width possessing higher elastic modulus appear in the gel which can play a significant role in the macroscopic mechanical properties of the gel.
|Journal or Publication Title:||Journal of Applied Physics|
|Uncontrolled Keywords:||BIOLOGICAL MATERIALS ; POLYMERS ; GELS ; VISCOELASTICITY ; ACOUSTIC MICROSCOPY ; MUSCLES ; ARTIFICIAL ORGANS ; DISPERSION RELATIONS ; MHZ RANGE ; FIBERS|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||05 Oct 2012 15:29|
|Last Modified:||03 Nov 2015 16:23|
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