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Proceedings Paper

Mechanical testing of hydrogels and PAN gel fibers
Author(s): Suzana Popovic; Hirohisa Tamagawa; Minoru Taya
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Paper Abstract

Uniaxial and biaxial mechanical tester was developed tp perform basic test for characterization of soft, low strength polymer gels. We have considered stress/strain relationship of acrylamide-based and polyacrylonitrile (PAN) fiber and sheet gels. Acrylamide-based gels were tested uniaxially, where Young's modulus estimated varies between 10 and 25 kPa. Uniaxial and biaxial tension test were performed on PAN sheets, from which Young's modulus was estimated at 6.65 Mpa, which is an extraordinarily large strength than the conventionally investigated acrylamide- based gels. Its length change in response to EtOH/H2O solution exchange proved to be not small as an actuator material, and it was observed that PAN exhibited a deformation in response to the electric field. Two types of PAN gel fibers were tested as a bundle of 50 fibers. True stress-strain data were obtained showing similar non-linear trend in both case. Statistical methods were used to assess fiber strength distribution.

Paper Details

Date Published: 7 June 2000
PDF: 10 pages
Proc. SPIE 3987, Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD), (7 June 2000); doi: 10.1117/12.387776
Show Author Affiliations
Suzana Popovic, Univ. of Washington (United States)
Hirohisa Tamagawa, Univ. of Washington (Japan)
Minoru Taya, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 3987:
Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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