The Effect of Peeling Rate and Peeling Angle on the Peeling Strength

Peeling force is an important property to characterize adhesion of materials. This force is defined as the force required to remove the adhesive film from a substrate. According to Dr. Alan N. Gent and Dr. K. Kendall's research, this debonding process is an energy driven process, and three terms contribute to the energy change: a surface energy term, a potential energy term, and an elastic energy term. Energy conservation analysis shows that peeling strength, peeling force per width, of the film is dependent on the peeling rates, peeling angle and elastic modulus. To continue their research, the influence of these variables on peeling force was studied. Polyisoprene was used as the testing material, and an effective instrument was set up to test peeling force. Peeling forces at different peeling rates and angles were tested separately. The relationship of peeling strength with peeling rates, peeling angles, and elastic modulus is discussed. The adhesive energy is calculated based on Kendall's model. Then Kendall's model is used to fits the relationship of peeling strength with peeling angles. A corrected model for rubber based on Kendall's model is proposed.