Characterization of gellan gels using stress relaxation
作者： Juming Tang , Marvin A. Tung , Yanyin Zeng
DOI: 10.1016/S0260-8774(98)00114-9
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摘要: Abstract The effect of testing parameters on stress relaxation characteristics and the relationship between those intrinsic gel properties were investigated. Gellan gels tested in using different crosshead speeds (3–300 mm/min) to apply strain (3–20%) specimens 21 31 mm diameter with aspect ratios 0.5, 1.0 1.5. Relaxation appeared be associated a release hydraulic pressure matrix. rate was inversely related specimen diameter, but positively pore sizes Increasing applied resulted larger initial stresses slightly lower equilibrium stresses. strength and, thus, degree crosslinking polymer network. As long as networks not permanently damaged during tests, structure could restored upon soaking water.
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