Rheological and mechanical behavior of blend-based polymer nanocomposites containing Janus and non-Janus silica nanoparticles

Ader, Fiona; Sharifzadeh, Esmail

doi:10.1007/s00396-021-04908-4

Cited by 14 publications

(12 citation statements)

References 46 publications

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“…Also, nanoparticles can act as nucleation agents and simplify the formation of crystals, but their aggregation/agglomeration may prevent this phenomenon. Previous studies have shown that the formation of aggregates/agglomerates in nanocomposites, even at the very low content of nanoparticles, is a determinative parameter in the final physical/mechanical characteristics of the system [15].…”

Section: Introductionmentioning

confidence: 99%

A study on the synergetic effects of self/induced crystallization and nanoparticles on the mechanical properties of semi-crystalline polymer nanocomposites: experimental and analytical approaches

2023

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This study investigates the effects of nanoparticle content, aggregation/agglomeration, polymer/particle interphase, and crystallinity on the mechanical properties of high-density polyethylene (HDPE) nanocomposites. Different samples of HDPE nanocomposites, containing 0.5, 0.75, and 2 wt.% of pure and surface-modified silica nanoparticles, were prepared by the melt-mixing method. The pure silica nanoparticles (PSN) and surface-modified silica (AMS) with (3-Aminopropyl) tri-ethoxy silane were characterized with field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared (FTIR) spectra.Differential scanning calorimeter (DSC) and X-ray diffraction (XRD) were used to estimate the crystallinity and crystal size of the samples. Finally, tensile testing was performed on the nanocomposites to establish the relationship between mechanical properties and nanoparticle loading, and surface modification. The results indicate that the crystallinity and elastic modulus of the nanocomposites increased with increasing nanoparticle content. Moreover, the Gutzow-Dobreva theory was used to determine the induced crystallinity. A mechanical model (Equivalent Box Model) was proposed to determine the crystalline, amorphous modulus, thickness and tensile modulus of the polymer/particle interphase region, which shows a decreasing trend with the nanoparticles content and indicates that this region is thicker for the HDPE/AMS relative to HDPE/PSN.

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Section: Introductionmentioning

confidence: 99%

A study on the synergetic effects of self/induced crystallization and nanoparticles on the mechanical properties of semi-crystalline polymer nanocomposites: experimental and analytical approaches

2023

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“…[15,16] It is proved that increasing the content of mineral nanoparticles in a polymer nanocomposite directly affects its physical/mechanical properties. [16][17][18][19] This effect can be either due to the presence of the mineral phase, affecting the mobility of polymer chains, or the formation of the polymer/particle interphase region. The former phenomenon can be seen in systems comprised of incompatible components in which there is no strong connection between the matrix and the dispersed nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Formation of nanoparticle aggregates and agglomerates in polymer nanocomposites and their distinct impacts on the mechanical properties

Sharifzadeh

Karami

Ader

2023

Polymer Engineering & Sci

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In this study, the different effects of nanoparticle aggregates and agglomerates on the mechanical properties of polymer nanocomposites are comprehensively investigated. To this end, a specific strategy, based on the equilibrium between the dispersion and cohesion energies in the mixing stage, is proposed using which the content and size of aggregates/agglomerates can be defined. The aggregated/agglomerated networks are considered to place in constrained volumes (CVs), having co‐continuous morphology. An equivalent box model (EBM), corresponding to the system, is used to predict the tensile modulus of the nanocomposite. Different test results of HDPE nanocomposite samples, containing 1–3 wt.% of surface‐modified silica nanoparticles, prepared by a semi‐industrial single screw extruder, are applied to validate the model. Moreover, other data from the literature are also used to further evaluate the accuracy and capability of the proposed analytical method.

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“…Introducing nanomaterial into this morphological structure; a possible filler migration between polymer phases occurs, which impacts the domain size and the interfacial properties. Fiona and Esmail studied the effect of Janus silica nanoparticles on the rheological and mechanical properties of a droplet-matrix blend configuration of polystyrene/poly(methyl methacrylate), PS/PMMA, and reported that the Janus particle improved the processability of the blend by decreasing their viscosity and consequently increasing the tensile modulus as result of the localization of the particle at the blend interphase [ 14 ]. Some research also shows that in a dispersed morphology, the presence of the droplets results in an improvement in the blend elasticity at low frequencies caused by stresses as result of the shape relaxation of the droplets induced by interfacial tension between the phases [ 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Migration in a Compatibilized Blend System, Leading to Kinetically Induced Enhancement in Electrical Conductivity and Mechanical Properties

2023

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Kinetic factors that facilitate carbon nanotube (CNT) migration in a polymer blend from a high-density polyethylene (HDPE) phase to a poly (p-phenylene ether) (PPE) phase were studied, with the objective to induce CNT migration and localization at the interface. Herein, a CNT filler was pre-localized in an HDPE polymer and then blended with PPE at different blend compositions of 20:80, 40:60, 60:40, and 80:20 of PPE/HDPE at a constant filler concentration of 1 wt%. The level of CNT migration was studied at different mixing times of 5 and 10 min. The electrical conductivity initially increased by 2–3 orders of magnitude, with an increase in the PPE content up to 40%, and then it decreased significantly by up to 12 orders of magnitude at high PPE content up to 100%. We determined that the extent of migration was related to the difference in the melt viscosity between the constituent polymers. A triblock copolymer styrene-ethylene/butylene-styrene (SEBS) was used to improve the blend miscibility, and 2 wt% copolymer was found to be the optimum concentration for the electrical properties for the two blend compositions of 20:80 and 80:20 of PPE/HDPE, at a constant filler concentration of 1 wt%. The introduction of the SEBS triblock copolymer significantly increased the conductivity almost by almost four orders of magnitude for PPE/HDPE/80:20 composites with 1 wt% CNT and 2 wt% SEBS compared to the uncompatibilized blend nanocomposite. The mechanical strength of the compatibilized blend nanocomposites was found to be higher than the unfilled compatibilized blend (i.e., without CNT), uncompatibilized blend nanocomposites, and the pristine blend, illustrating the synergistic effect of adding nanofillers and a compatibilizer. SEM and TEM microstructures were used to interpret the structure–property relationships of these polymer blend nanocomposites.

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Rheological and mechanical behavior of blend-based polymer nanocomposites containing Janus and non-Janus silica nanoparticles

Cited by 14 publications

References 46 publications

A study on the synergetic effects of self/induced crystallization and nanoparticles on the mechanical properties of semi-crystalline polymer nanocomposites: experimental and analytical approaches

A study on the synergetic effects of self/induced crystallization and nanoparticles on the mechanical properties of semi-crystalline polymer nanocomposites: experimental and analytical approaches

Formation of nanoparticle aggregates and agglomerates in polymer nanocomposites and their distinct impacts on the mechanical properties

Carbon Nanotube Migration in a Compatibilized Blend System, Leading to Kinetically Induced Enhancement in Electrical Conductivity and Mechanical Properties

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