Long-term performance and durability of polycarbonate/carbon nanotube nanocomposites

Due to their good mechanical properties, low density, and ease of processing polymer nanocomposites are of interest for a multitude of applications in the automotive, electronics, and leisure industry. Besides having an impact on short-term mechanical performance of polymers, the addition of nanorei...

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Bibliographic Details
Published in:Nanocomposites 2018-10, Vol.4 (4), p.223-237
Main Authors: Pastukhov, Leonid V., Mercx, Frans P. M., Peijs, Ton, Govaert, Leon E.
Format: Article
Language:English
Subjects:
Addition polymerization
Carbon nanotube
Carbon nanotubes
Crack propagation
creep
Creep (materials)
Durability
Experimentation
Failure mechanisms
failure prediction
fatigue
Mean time to failure
Mechanical properties
nanocomposite
Nanocomposites
Polycarbonate resins
Polymers
thermoplastic
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Summary:Due to their good mechanical properties, low density, and ease of processing polymer nanocomposites are of interest for a multitude of applications in the automotive, electronics, and leisure industry. Besides having an impact on short-term mechanical performance of polymers, the addition of nanoreinforcements can have also a significant effect on long-term properties such as the resistance to static (creep) and cyclic (fatigue) loadings. However, despite its significance there is a shortage of long-term mechanical performance data for thermoplastic-based polymer nanocomposites. Reason being that existing characterization methods for long-term performance and durability are time consuming and limited in their applicability. Here, an engineering approach to predict long-term time-to-failure of polycarbonate/carbon nanotube (PC/CNT) nanocomposites is presented based on short-term experimentation with an application to both creep and fatigue. Results showed that the addition of CNTs had an opposite effect on two important long-term failure mechanisms. Addition of CNTs lead to improvements in durability in the plasticity-controlled failure regime, whereas it had an adverse effect in the slow crack growth-controlled regime, meaning that in the latter regime nanocomposite performance was significantly less than that of the neat polymer matrix.
ISSN:2055-0324
2055-0332
DOI:10.1080/20550324.2018.1558799