Abstract
The stress-strain curve of the cross-linked acrylic pressure sensitive adhesive (PSA) was measured by a tensile test at various strain rate.From the detail observation of the stringiness behavior of PSA at peeling,the strain and strain rate for stringiness were determined in the same way as the previously reported method. From correspondence of these two results,the internal stress generated in the fibril of stringiness at peeling was able to be calculated.This internal stress means that in the nonequilibrium state at peeling of PSA. We established the method to determine the internal stress using the strain rate even if in the unsteady state at peeling of PSA.The peeling rate was changed dependent on the adherend.However,the internal stress of PSA was found to be almost constant dependent on the applied peeling load.
