Abstract
High-performance composites suffer from fatigue crack propagation during service. Traditional repair methods can be expensive and time-consuming. Therefore, research on composites with self-healing capabilities has considerably increased in the past decade. The aim of this work is to develop a polyamide 6 (PA6) matrix with self-healing properties. Polycaprolactone (PCL) was used as healing agent and melt compounded with PA6. PCL caused a decrease of the mechanical properties of PA6, due to its immiscibility and low mechanical properties. Nevertheless, acceptable fracture toughness values in quasi-static mode were obtained. Samples were thermally mended at 80 and 100 °C, and the healing efficiency was assessed by comparing the fracture toughness of virgin and repaired samples both in quasi-static and in impact mode. The blend with a PCL content of 30 wt% showed limited healing efficiency values (up to 6%) in quasi-static mode, while an interesting repair capability (53%) was detected under impact conditions. This discrepancy was explained through microstructural analysis and correlated to a different fracture morphology. In fact, under quasi-static mode, the PA6 matrix was severely plasticized, while under impact a brittle fracture surface was obtained. This morphology favored the flow of PCL during the thermal healing process.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference73 articles.
1. Preparation, development, outcomes, and application versatility of carbon fiber-based polymer composites: A review;Das;Adv. Compos. Hybrid Mater.,2019
2. Jawaid, M., Thariq, M., and Saba, N. (2019). Mechanical and Physical Testing of Biocomposites, Fibre-Reinforced Composites and Hybrid Composites, Woodhead Publishing.
3. Dynamic crack propagation in rubber-modified composite models;Papadopoulos;J. Mater. Sci.,1988
4. Composite Repair in Wind Turbine Blades: An Overview;Katnam;J. Adhes.,2015
5. Self-healing composites: A state-of-the-art review;Kanu;Compos. Part A Appl. Sci. Manuf.,2019
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