Toughness evaluation of poly(butylene terephthalate) nanocomposites

Soudmand, B.H.; Shelesh‐Nezhad, Karim; Hassanifard, Soran

doi:10.1016/j.tafmec.2020.102662

Cited by 23 publications

(12 citation statements)

References 62 publications

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“…The elongation at break of PBT/MBClay nanocomposites was smaller than that of neat PBT, likely due to the presence of agglomerated and intercalated MBClay layers in the PBT matrix. Similar tensile behaviors were reported by other studies [24,26,41,46].…”

Section: Tensile Testsupporting

confidence: 91%

“…Although PBT has good mechanical properties and thermal stability, these are still insufficient for its potential applications in a wide range of industrial fields. Thus, the incorporation of different fillers in micro and nano-size into PBT has been evaluated in order to develop high-performance PBT composite materials applicable for advanced industries [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. Additionally, the incorporation of only a small amount of clay, into PBT can increase the low impact strength and heat distortion temperature, and reduce the brittleness and cost, widening the field of applicability of this polyester [24,25,30].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Colombo¹,

Díaz²,

Kodali³

et al. 2022

Preprint

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In contrast to the traditional fillers, clay, in particular, natural smectite clay represents an environmentally significant alternative to improve the properties of polymers. Compared to con-ventional nanofillers, smectite clay can effectively enhance the physical and mechanical properties of polymer nanocomposites with a relatively small amount of addition (< 5 wt%). The present study focuses on investigating the reinforcing efficiency of different amounts (up to 5 wt%) of a natural Brazilian smectite clay on the mechanical and thermal properties of poly(butylene terephthalate) (PBT) nanocomposites. Natural Brazilian clay modified by addition of quaternary salt and sodium carbonate (MBClay) was infused into the PBT polymer by melt extrusion, using a twin-screw extruder. It was found that the best properties for PBT were obtained at 3.7 wt% of modified BClay. Tensile strength at break exhibited an increase of about 60 %, flexural strength increased by 24 % and flexural modulus increased by 17 %. In addition, an increase in the crystallinity percentage of PBT/BClay nanocomposite was confirmed by DSC and XRD analysis, and a gain of about 45 % in HDT was successfully achieved due to incorporation of 3.7 wt% of MBClay.

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Section: Tensile Testsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Colombo¹,

Díaz²,

Kodali³

et al. 2022

Preprint

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show abstract

“…The higher mechanical strength upon nanofiller inclusion can be ascribed to the high dispersion levels of nanoparticles and improved polymer‐filler interfacial adhesion, which inhibited crack coalescence in the polymer, increased the polymer‐filler load transfer, and consequently led to a higher load‐bearing capacity. [ 62 ] As evident from Figure 9A, the inclusion of CaCO 3 further improved the tensile and flexural strength by 7% and 17%, respectively, when compared to POM/CB. The substantial increment in mechanical strength for the ternary nanocomposites, as compared to POM/CB, reflects the contributing effects of two nanoparticles, in terms of homogenous distribution, when applied into a single polymeric matrix.…”

Section: Resultsmentioning

confidence: 93%

“…[ 23,58 ] CaCO 3 was mainly utilized as a toughening agent in different thermoplastics, which enhanced the thermal, mechanical, and tribological performance of hosting matrices. [ 59–62 ] A synergetic improvement in stiffness and toughness with the inclusion of NCC into POM was observed, ascribed to a proper particle‐matrix bonding. [ 63 ] The surface modification of CaCO 3 using a fatty acid also contributes to lowering the surface energy and better disperse the nanoparticles in the polymer.…”

Section: Introductionmentioning

confidence: 99%

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

2022

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In the present contribution, the mechanical and thermal characteristics of polyoxymethylene (POM)/carbon black (CB)/CaCO3 (NCC) ternary nanocomposites were assessed through mechanical tests and morphological observations. Scanning electron microscopy (SEM) micrographs indicated the uniform distribution of nanoparticles in the matrix. Dynamic mechanical thermal analysis (DMTA) revealed a promotion of elastic response and lower energy dissipation in ternary nanocomposites against neat POM and single‐filled POM/CB samples. Tensile strength results showed the increase of tensile modulus and strength by 27% and 8% for the ternary nanocomposite compared to binary POM/CB. Flexural and impact properties were also enhanced with the inclusion of NCC as a second rigid phase. SEM observations of impact‐fractured surfaces at high magnifications revealed full and partial debonding of nanoparticles from the matrix and consequent cavitation in the matrix, which mainly contributed to impact toughening. Hashin‐Shtrikman model was employed to analyze its efficiency to predict Young's modulus of ternary nanocomposite systems.

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“…Also, it can be obviously seen that, owing to unstable crack growth, a smooth fractured surface is prevalent in this specimen which has been reported before. 29 In order to escalate PBT toughness, PBT was blended with TPU. Figure 4 illustrates the SEM images of fractured surfaces of blends containing 10, 20, and 30 wt.% of TPU elastomeric phase, respectively.…”

Section: Morphology Observationmentioning

confidence: 99%

Fracture toughness and fractographic investigation of polybutylene terephthalate/thermoplastic polyurethane binary blends reinforced by multi-walled carbon nanotubes using essential work of fracture approach

Tehran

Heidari

Chakherlou

et al. 2022

Journal of Composite Materials

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In this paper, fracture toughness evaluation of polybutylene terephthalate (PBT)/thermoplastic polyurethane (TPU) binary blends and PBT/TPU/carbon nanotubes (CNTs) ternary nanocomposites have been conducted using both Izod impact and quasi-static fracture tests. Essential work of fracture (EWF) approach is used to study the fracture properties in details. The results of EWF tests revealed an effective role of TPU and CNTs in toughening mechanism of binary blends and ternary nanocomposites. According to EWF results, both the crack resistance and plastic deformation energies promoted in all compounds as compared to neat PBT. Energy dissipation in the yielding and tearing stages determined by the energy partitioning method. The obtained results indicated that displacement up to the failure point increased by increasing the TPU content, while inclusion of CNTs reduced this quantity. The specific non-essential work of fracture [Formula: see text] , [Formula: see text], and [Formula: see text] increased with increasing the TPU contents which is confirmed by load-displacement curves. Whereas, addition of CNTs reduced [Formula: see text] and [Formula: see text] values as compared to reference binary blend, however, ternary nanocomposites still have higher values as compared to pure PBT. In contrast with EWF results, high strain rate of impact test prevents the activation of toughness improving mechanisms that readily occurs in quasi-static loading.

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Toughness evaluation of poly(butylene terephthalate) nanocomposites

Cited by 23 publications

References 62 publications

Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

Fracture toughness and fractographic investigation of polybutylene terephthalate/thermoplastic polyurethane binary blends reinforced by multi-walled carbon nanotubes using essential work of fracture approach

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Toughness evaluation of poly(butylene terephthalate) nanocomposites

Cited by 23 publications

References 62 publications

Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Influence of Reinforcing Efficiency of Clay on the Mechanical Properties of Poly(butylene terephthalate) Nanocomposite

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO3 ternary nanocomposite systems

Fracture toughness and fractographic investigation of polybutylene terephthalate/thermoplastic polyurethane binary blends reinforced by multi-walled carbon nanotubes using essential work of fracture approach

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Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems