Characterization of the interfacial bonding at solid/melt interfaces in multiphase carbon fibre reinforced thermoplastic composites

Phase morphology and bond strength at solid/melt interfaces between continuous fibre reinforced thermoplastic laminates and over-injected thermoplastic phases were investigated, both theoretically and experimentally. The obtained results indicated that the interface temperature plays a critical role in determining the quality of the resulting interface. This was in turn shown to be related to the thermal properties of the phases, in particular, thermal diffusivities. Interface temperature was analytically computed based on thermal properties of the laminate and the injected phases, as well as the melt temperature distribution mapped over the interfacial region using MoldFlow simulation. © 2017 International Committee on Composite Materials. All rights reserved.