Abstract
Mathematical experessions of visco-elastic behavior of two types of sealants, two-part polysulfide and two-part silicone sealants were investigated in this paper. Relaxation tests were adopted to study the behavior of sealants, and we found out that their behavior were able to be expressed by power rule. The tests were furthermore carried out at various temperature from -20℃ to 80℃ at 20℃-steps to know the effect of temperature changes, and the mathematical expressions of relaxation moduli including the function of temperature were obtained. Then, tensile and compressive tests were carried out at various rates from 0.005mm/min to 500mm/min, at the aforementioned temperatures. The behavior of two sealants in tension and compression were calculated by the equations derived from the above moduli, and the validity of the equations was discussed by the comparison between the calculated and observed ones.
