Improvement of toughness properties of polypropylene filled with nanobentonite using stearic acid as interface modifier

Hernandez, Yarazett; Lozano, Tomás; Morales, Ana B.; Navarro‐Pardo, Fabiola; Lafleur, Pierre G.; Sánchez-Valdés, S.; Martinez-Colunga, Guillermo; Morales-Zamudio, Luisiana; Lira-Gómez, Patricia de

doi:10.1177/0021998316644852

Cited by 17 publications

(12 citation statements)

References 25 publications

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“…Most reports regarding polymers reinforced with fillers, the elongation at break is reduced even at low concentrations of fillers . In previous papers, we observed increased elongation at break, in PP filled with nanoclays . The approach employed in this work (RGO) exhibited remarkable improvements of up to 15% in elongation when compared to the pure polymer.…”

Section: Resultssupporting

confidence: 51%

Influence of graphene‐based compounds on the mechanical toughness and thermal stability of polypropylene

Castillo

Lozano

García

et al. 2019

J of Applied Polymer Sci

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A study of the improvement of the mechanical and thermal properties of nanocomposites prepared with polypropylene (PP) and different graphene samples [graphene oxide (GO), reduced GO (RGO), and commercial graphene (G)] is presented. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy characterization were applied to the graphene samples. The nanocomposites were characterized by thermogravimetric analysis, XRD, differential scanning calorimetry, transmission electron microscopy (TEM), tensile, and impact resistance tests. PP/RGO nanocomposites showed significant improvement in mechanical and thermal properties. Sample PP/RGO-0.75 resulted in an increment in Young's modulus (51%), tensile strength (24%), and elongation at break (15%). This is attributed to a good dispersion state, a higher crystallinity percentage, and a good interfacial adhesion between PP and RGO. Sample PP/RGO-0.50 exhibited an increase of 197 C in the temperature at which a loss in weight of 5% occurred, compared to that for pure PP. The height of stacked layers calculated by XRD measurements was similar to the value observed by TEM.

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Section: Resultssupporting

confidence: 51%

Influence of graphene‐based compounds on the mechanical toughness and thermal stability of polypropylene

Castillo

Lozano

García

et al. 2019

J of Applied Polymer Sci

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“…Many studies have been carried out in this field from different points of view e.g. surface modification [15], mechanical characterization [16], microstructure analysis [11,14], rheological performance [17] etc. [4,18].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of surface modification impact on PP/MWCNT nanocomposites by rheological and mechanical characterization, assisted with morphological image processing

2018

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PP/MWCNT nanocomposites were prepared using polypropylene and modified carbon nanotubes (CNTs) via melt-extrusion process. Pure PP was compared with maleic anhydride grafted polypropylene, reinforced with 0.5, 1, and 1.5 wt% COOH-modified nanotubes (PPgCNT) and polypropylene/unmodified CNT nanocomposite (PPCNT) in 1 wt% content. Morphological analysis was performed using FTIR and SEM along with MATLAB and easy fit software-assisted image processing. Image processing of SEM monographs for well-distributed CNTs showed a distribution factor (b) close to 0 while b in agglomerated samples was close to 1. Mechanical properties showed that tensile strength and tensile modulus of nanocomposites were higher than pure PP, in contrast the tensile elongation at break was lower. In addition, nanocomposites with modified nanotubes showed higher tensile strength, tensile modulus, and lower elongation at break compare with unmodified CNT/PP nanocomposites. Capillary rheometries resulted that at high strain rate [100-1500 (s 21 )], melting behavior of the samples is similar to the viscoplastic fluids, and Herschel-Bulkley model is the best approach for prediction of the fluid's rheological behaviors. Adding the modified and unmodified CNTs only changed the model's parameters. Oscillating rheometry studies concluded that at 1% strain, molten nanocomposites followed the viscoelastic behavior while in higher shear rates flow behavior is different. According to the oscillatory rheometry results, storage modulus, loss modulus, complex modulus, and complex viscosity of PPgCNTs were higher than PP and PPCNT. It is concluded that by reduction of b, nanocomposites become more viscoplastic (in high shear rates). Finally, statistical analysis confirmed the rheological and mechanical results. POLYM. COMPOS., 00:000-000, 2018.Image Processing. A new model was provided for studying the distribution of nanotubes through nanocomposites, using image processing analysis of the resulted SEM micrographs. This model is obtained from the statistical scatter FIG. 1. SEM images of PP/MWCNTs composites: (a) PPCNT1, (b) PPgCNT0.5, (c) PPgCNT1, and (d) PPgCNT1.5.

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“…However, low temperature brittleness and poor impact resistance restrict its applicability. Among all strategies for PP toughening, the introduction of a β -nucleating agent has been demonstrated to be the most reliable strategy [1,2,3,4,5,6,7,8]. Nowadays, due to the low cost, simple processing, and their non-toxic, macromolecular β -nucleating agents (such as polystyrene (PS), acrylonitrile-butadiene-styrene graft copolymer (ABS), or thermo-plastic phenolic resin) have been reported to have higher β -nucleating efficiency compared with low molecular weight organic β -nucleating agents.…”

Section: Introductionmentioning

confidence: 99%

Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

Wang

Xie

et al. 2019

Polymers

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To improve the poor impact toughness of polypropylene (PP), organo-sepiolite (O-Sep) filled 80/20 (w/w) polypropylene/poly(acrylonitrile-butadiene-styrene) (PP/ABS) nanocomposites were fabricated. The contents of O-Sep were correlated with the morphological, mechanical, and rheological behavior of PP/ABS/O-Sep blends. Scanning electron microscopy (SEM) was applied to study the morphology and thermogravimetric analysis (TGA) was applied to study the thermal stability. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were applied to study the crystallinity. The obtained results show that O-Sep enhanced the dispersion of ABS in the PP matrix and increased the crystallinity of blends. The rheological results show that O-Sep could increase the viscosity, storage modulus, and loss modulus of blends. Moreover, the mechanical behavior shows that O-Sep (at proper content) simultaneously increased the tensile modulus, flexural modulus, and impact strength of PP/ABS/O-Sep blends.

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Improvement of toughness properties of polypropylene filled with nanobentonite using stearic acid as interface modifier

Cited by 17 publications

References 25 publications

Influence of graphene‐based compounds on the mechanical toughness and thermal stability of polypropylene

Influence of graphene‐based compounds on the mechanical toughness and thermal stability of polypropylene

Evaluation of surface modification impact on PP/MWCNT nanocomposites by rheological and mechanical characterization, assisted with morphological image processing

Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

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