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Measurements of resistance per tensile strain via different Alg/PAM/CMC-CHs. (a) Schematic illustration of resistance per strain test with automatic stretch-testing machine and LCR meter and (b) photographs showing pristine (i), stretched/released (ii), and mechanically broken Alg/PAM/CMC-CHs. (c) Continuous tensile strain of the samples at a speed of 0.015 mm/s. (d) Cyclic stretching test from 0% to 100% repetitively for strains at a speed of 0.3 mm/s at 100 times.
