(1) Otsuma Women’s University, 12, Sanban-cho, Chiyoda-ku, Tokyo 102-8357, Japan;(2) Shinshuu University, 3-15-1, Tokida, Ueda, Nagano 386-8567, Japan;(3) Fukui University of Technology, 3-6-1, Gakuen, Fukui 910-8505, Japan
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.
This revised version was published online in July 2006 with corrections to the Cover Date.