Abstract
Application of thermomechanometry to the measurement of hydrogels containing a large amount of water was carried out by static and dynamic methods. A thermomechanical analyzer (TMA) equipped with a quartz compression probe immersed in water was used. Polysaccharide hydrogels containing ca 98% water were measured. Creep of hydrogels in water was analyzed in a stress range from 1.04⋅103 to 5.2⋅103 Pa and loading rate from 0.3⋅103 to 3.0⋅103 Pa min−1.Stress relaxation was measured in compressed ratio range from 0.02 to 0.45 m m−1 and in compressing rate was 0.09 to 0.15 m m−1 min−1. Dynamic viscoelasticity was measured by TMA when dynamic Young’s modulus which was larger than 1⋅104 Pa in frequencies ranging from 0.02~0.2 Hz.
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Iijima, M., Hatakeyama, T., Takahashi, M. et al. Thermomechanical Analysis of Polysaccharide Hydrogels in Water. Journal of Thermal Analysis and Calorimetry 64, 617–627 (2001). https://doi.org/10.1023/A:1011519706295
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DOI: https://doi.org/10.1023/A:1011519706295