Fracture mechanisms and failure analysis of PA6/NBR/graphene nanocomposites by essential work of fracture

Nakhaei, Mohammad; Naderi, Ghasem; Ghoreishy, Mir Hamid Reza

doi:10.1007/s13726-021-00950-9

Cited by 11 publications

(16 citation statements)

References 38 publications

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“…This finding is in good agreement with the morphology observed by some other researchers. [59][60][61][62][63] Therefore, in this study, like other research articles mentioned above, it can be concluded that hindering the coalescence of rubber particles is caused by the presence of nanoparticles in blend nanocomposites since the size of etched TPO particles in the blend nanocomposites is smaller than the blend polymers. In addition, the quality of dispersion of the nanoparticles is shown in Figure 5.…”

Section: Phase Morphologysupporting

confidence: 60%

Effect of fumed silica and halloysite nanoparticles on the microstructure, mechanical, and fracture properties of thermoplastic polyolefin elastomer toughened polypropylene

et al. 2022

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In this article, mechanical and fracture properties of two types of nanoparticles, namely fumed silica (FS) and halloysite nanotube filled polypropylene (PP) toughened with two types of thermoplastic elastomers (TPOs), namely ethylene-based TPO (ETPO) and propylene-based TPO (PTPO) were investigated. A full factorial design was exploited to clarify the influence of each factor as well as its interaction on outcomes. The essential work of fracture (EWF) approach was utilized to study the effect of each factor on fracture behavior. The addition of TPO enhanced the elongation at break and non-EWF by 62% and 40%, in turn. In addition, the tensile strength, modulus, and EWF increased by 8%, 34%, and 7%, respectively, by increasing the nanoparticles up to 1 wt%. The blend nanocomposite with 10 wt% of PTPO and 1 wt% of FS was selected as the best stiffnesstoughness-strength equivalence based on optimization results. Additionally, the R 2 extracted from the analysis of variance (ANOVA) and plots of normal probability indicated good agreement between the experimental data and for foreseen one using full factorial models.

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Section: Phase Morphologysupporting

confidence: 60%

Effect of fumed silica and halloysite nanoparticles on the microstructure, mechanical, and fracture properties of thermoplastic polyolefin elastomer toughened polypropylene

et al. 2022

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“…Then, maximum stresses in terms of ligament length are determined for each sample. According to the protocol, all the maximum stresses for each material should be between 0.9 S m and 1.1 S m to prove the condition of plane stress 62 . As shown in Figures 7 and 8, all compounds had this condition.…”

Section: Resultsmentioning

confidence: 94%

Mechanical behavior and essential work of fracture of surface‐modified exfoliated graphite filled polypropylene/ethylene‐vinyl acetate blend nano‐composites

Fotoohi

Ghasemi

Fasihi

et al. 2023

J of Applied Polymer Sci

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Polymer nano-composites have an extensive diversity of applications in many areas, including automotive, construction, healthcare, and electronics. Excellent tensile and fracture properties are commonly required to achieve the appropriate properties. In this research, the tensile and fracture behavior of polypropylene (PP)/ethylene-vinyl acetate (EVA)/exfoliated graphite (EG) blend nanocomposites are investigated. The exfoliated graphite was either unmodified or surface-modified with ammonium polyphosphate (APP). When the modified exfoliated graphite (EG-g-APP) was added to PP/EVA compounds, the tensile properties were more enhanced compared to unmodified EG. The elongation at break was around 2 times greater in the blend containing EG-g-APP. The essential work of fracture (EWF) approach was utilized to evaluate the effect of EG and EG-g-APP on the fracture behavior of PP/EVA blends. The w e and βw p values of the nano-composites including EG-g-APP were mainly higher than nano-composites containing EG at the same nano-filler concentration. Also, according to SEM imaging, the EWF analysis results suggested that the preeminent mechanism of fracture in various compounds is the debonding of EVA from PP, which causes shear yielding and fibrillar structures on the surface of the compounds. It was observed that as EVA increased, the number of cavities and the size of fibrillar structures were increased. Enhancement in fracture toughness and matrix resistance was attributed to a growth in the number of nano-voids and a decrease in voids' size.ammonium polyphosphate, essential work of fracture, ethylene-vinyl acetate, exfoliated graphite, polypropylene, tensile properties | INTRODUCTIONPolypropylene (PP) is the commonly used polyolefin in many applications such as interior construction, food packaging, agriculture, textiles, the automobile industry, electronics appliances, chemical preservation, and so forth. due to its good chemical resistance, easy processing, high thermal stability, and low cost. Against these appropriate properties, the sensitivity to notch and the low toughness of this polymer, especially at low temperatures

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“…21,56 EG nanoparticles, on the other hand, act as crack initiation areas for their susceptibility to stress concentration, which reduces crack initiation resistance (EWF). 57…”

Section: Resultsmentioning

confidence: 99%

“…21,56 EG nanoparticles, on the other hand, act as crack initiation areas for their susceptibility to stress concentration, which reduces crack initiation resistance (EWF). 57 non-EWF. Figure 9 shows the main effect plot for the non-EWF in terms of the effect of EVA and EG.…”

Section: Plot Of Main Effectsmentioning

confidence: 99%

Multi-response optimization of tensile and fracture properties of polypropylene/ethylene-vinyl acetate/exfoliated graphite by the design of experiment

Rajaee

Ghasemi

Fasihi

et al. 2022

Journal of Elastomers & Plastics

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Thermoplastic elastomeric nanocomposites have a wide range of applications in the automotive, medical, electronics, and energy sectors. Good mechanical and fracture performances are typically needed to reach the desired properties for the applications. In this study, tensile and fracture properties of exfoliated graphite (EG) filled PP toughened with ethylene-vinyl acetate (EVA) are examined. Accordingly, four levels of EVA (0, 10, 20, and 30 wt.%) and EG (0, 1, 3, and 5 wt.%) are utilized. The full factorial design is employed to explain the effect of independent parameters and their interaction on responses. The essential work of fracture (EWF) methodology is also employed to investigate the fracture behavior of the blend nanocomposites. By increasing EVA, the elongation at break and non-EWF are increased by 188% and 75%, in succession. Moreover, the tensile modulus is improved up to 11% by increasing EG. The compound with 10 wt.% EVA and 1 wt.% EG has the best toughness-strength-stiffness balance based on the optimization results.

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Fracture mechanisms and failure analysis of PA6/NBR/graphene nanocomposites by essential work of fracture

Cited by 11 publications

References 38 publications

Effect of fumed silica and halloysite nanoparticles on the microstructure, mechanical, and fracture properties of thermoplastic polyolefin elastomer toughened polypropylene

Effect of fumed silica and halloysite nanoparticles on the microstructure, mechanical, and fracture properties of thermoplastic polyolefin elastomer toughened polypropylene

Mechanical behavior and essential work of fracture of surface‐modified exfoliated graphite filled polypropylene/ethylene‐vinyl acetate blend nano‐composites

Multi-response optimization of tensile and fracture properties of polypropylene/ethylene-vinyl acetate/exfoliated graphite by the design of experiment

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