Novel thermoplastic matrix resin with low processing temperature and good interfacial strength for carbon fiber-reinforced polyethersulfone
Yoon Sang Kim, Min Jeong Ko, Sang‐Woo Kim, Jungwan Lee, Jung-Soo Kim, Youngseok Oh, Yi Jin
Abstract
Owing to the increased demand for carbon fiber-reinforced thermoplastic composites with excellent recyclability, there is a need to improve the interfacial bonding between the fiber and matrix. Hydroxy-functionalized polyethersulfone (PES), i.e., PES-OH, and epoxy resin (ER) were included to impart functionality to PES. A mixture of PES, PES-OH, and ERs with a weight ratio of 8:1:1 reduced the T g by −18% compared with 100% PES. The enhancement of the interfacial properties increased the interlaminar shear, tensile, compressive, and residual compressive strengths by 50%, 22%, 43%, and 25%, respectively. This study can contribute to the development of carbon fiber composites for future mobility. • CFRTP was created by blending PES, PES-OH, and epoxy at an 8:1:1 wt ratio. • The addition of 10% PES-OH and 10% epoxy resulted in a semi-network-like structure. • Adding additives reduced T g by −18% and the processing temperature by −50 °C. • The addition of active groups to a mixture enhances its mechanical performance. • The CAI strength increased with broader deformation owing to its high flexibility.