ショートビーム法を用いた短繊維強化熱可塑性プラスチックの界面せん断強さ評価

抄録

Fiber reinforced thermoplastics (FRTPs) are widely used in a variety of molding methods because of their good specific elasticity and specific strength. As an index to evaluate the interface strength, the interface shear strength (IFSS) has been concerned by people all the time, and many evaluation methods have been put forward. These methods aim at a single fiber and ignore the interaction between fibers. In this paper, a short beam method based on three-point bending test is proposed, and it is directly evaluated by FRTP injection molded parts. The fiber distribution angle and interfacial shear strength were obtained and compared with the previous evaluation results. This angle showed the orientation of the fibers with the highest frequency in the central layer. Combined with the welding strength, IFSS and heat flows from DSC measurement, the solidification temperature of PP/GF composites is observed, and it was clear that the solidification temperature of PP/GF composites is agreement with the crystallization completion temperature.