Effect of the interfacial adhesion on the tensile and impact properties of carbon fiber reinforced polypropylene matrices

Abstract

Thermoplastic composites have been applied in a wide variety of industrial products, showing recently a great potential to be used in aeronautical field. The objectives of this work were to evaluate the fiber/matrix interface of carbon fiber reinforced polypropylene-based matrices after tensile and impact tests and also to compare the mechanical test results of the manufactured laminates. The laminates were prepared by stacking carbon fiber fabric style Plain Weave (CF) and films of four different polypropylene matrices, described as (a) polypropylene-PP, (b) polypropylene-polyethylene copolymer-PP-PE, (c) PP-PE with an interfacial compatibilizer-AM1 and (d) PP-PE containing an elastomeric modifier-AM2. The composites were processed using hot compression molding. The mechanical testing results showed that the CF-AM1 laminate family presented the lowest impact strength and the highest tensile strength values when compared to the other laminates. SEM analysis observations of both tensile and impact fractured specimens of the CF-PP/PE-AM1 specimens revealed a stronger fiber/matrix interface. The CF-PP/PE-AM2 laminate showed a lower tensile strength and higher impact strength values when compared to the CF-PP/PE-AM1 one. PP-PE and PP laminates presented the lowest impact strength values

Self-repair of structural and functional composites with intrinsically self-healing polymer matrices: A review

“…In the case of partial debonding intermediate stiffness values are obtained. Several studies described interfaces that are modified to improve the adhesion between fiber and matrix which show higher elastic moduli than their unmodified counterparts [58,65,66]. A study by Thomason et al on continuous glass fiber reinforced polyimides shows that the composite stiffness is unaffected by changes in the fiber diameter because the fiber length greatly exceeds the L c [67].…”

“…However, for continuous fiber reinforced composites, this effect is much less. Additionally, delamination between fiber and matrix can have a significant effect on the crack-growth resistance and may therefore even increase the ultimate strength of a polymer composite [65,74].…”

2D Carbon Fiber Reinforced High Density Polyethylene Multi-Layered Laminated Composite Panels: Structural, Mechanical, Thermal, and Morphological Profile

“…As well as, CF was well bonded to HDPE matrix, aligned tows of CF in direction perpendicular to the impact force caused to absorb the impact force passed on to the specimen [37] . Moreover, the energy involved in impact test was consumed by both the sample and fracture process in the form of vibrational energy within the testing specimen [38] .…”

The micro/macro mechanical approach of reinforced braid composite used in tribology

“…Another reason for low adhesion is more energy absorption and better degradation distribution. 22 The hierarchical braid makes the fibers more mechanically engaged with each other and has a complex structure. This mechanical engagement could reduce cracks growth due to tribological loading and poor PTFE/epoxy adhesion and might be the solution.…”