Mechanical properties of polyamide-12 layered silicate nanocomposites and their relations with structure

Hocine, Nourredine Aït; Médéric, Pascal; Aubry, Thierry

doi:10.1016/j.polymertesting.2007.12.002

Cited by 74 publications

(59 citation statements)

References 43 publications

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“…As expected, YM increased with increasing volume fraction of the nanofiller. Generally, the stiffness of polymeric materials compared to their respective reference matrix (without nanofiller) increases with increasing filler concentration as long as the nanofiller is sufficiently dispersed and a certain degree of exfoliation within the matrix is achieved (Utracki and Limited, 2004;Aït Hocine et al, 2008). Therefore, continuously increasing YM values can be understood as good indicators for sufficiently-dispersed and well-exfoliated nanofiller particles within the WPI matrix.…”

Section: Effect Of Nanofiller Concentrationmentioning

confidence: 99%

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

et al. 2017

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In this study, the effects of the addition of montmorillonite (MMT) nanoplatelets on whey protein isolate (WPI)-based nanocomposite films and coatings were investigated. The main objective was the development of WPI-based MMT nanocomposites with enhanced barrier and mechanical properties. WPI-based nanocomposite cast films and coatings were prepared by dispersing 0% (reference sample), 3, 6, 9% (w/w protein) MMT, or, depending on the protein concentration, also 12 and 15% (w/w protein) MMT into native WPI-based dispersions, followed by subsequent denaturation during the drying and curing process. The natural MMT nanofillers could be randomly dispersed into film-forming WPI-based nanodispersions, displaying good compatibility with the hydrophilic biopolymer matrix. As a result, by addition of 15% (w/w protein) MMT into 10% (w/w dispersion) WPI-based cast films or coatings, the oxygen permeability (OP) was reduced by 91% for glycerol-plasticized and 84% for sorbitol-plasticized coatings, water vapor transmission rate was reduced by 58% for sorbitol-plasticized cast films. Due to the addition of MMT nanofillers, the Young's modulus and tensile strength improved by 315 and 129%, respectively, whereas elongation at break declined by 77% for glycerol-plasticized cast films. In addition, comparison of plasticizer type revealed that sorbitol-plasticized cast films were generally stiffer and stronger, but less flexible compared glycerol-plasticized cast films. Viscosity measurements demonstrated good processability and suitability for up-scaled industrial processes of native WPI-based nanocomposite dispersions, even at high-nanofiller loadings. These results suggest that the addition of natural MMT nanofillers into native WPI-based matrices to form nanocomposite films and coatings holds great potential to replace well-established, fossil-based packaging materials for at least certain applications such as oxygen barriers as part of multilayer flexible packaging films.

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Section: Effect Of Nanofiller Concentrationmentioning

confidence: 99%

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

et al. 2017

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“…(3), it is well known that Young's modulus increases for a polymer when we incorporate any reinforcement filler into it. This is reasonable because the ratio of the filler modulus to that of the polymer for all of the various filler-polymer combinations exceeds 30:1 [17]. identified with a percolation threshold [17].…”

Section: Young's Modulusmentioning

confidence: 80%

“…The nature of deformation of the NBR-carbon rubber composites under an applied load can be understood from the stress-strain curves [17]. …”

Section: Resultsmentioning

confidence: 99%

“…Young's Modulus of the composites is the bulk property that attracted more attention in this area of research [16], where it is characterizing the rigidity of the materials, calculated as the slope of the linear part of the stress-strain curve, at low strains (20 %) [17]. As shown in Fig.…”

Section: Young's Modulusmentioning

confidence: 99%

“…The quantities ρf , Sf ,and Ei represent the density of filler, the specific surface area of the filler and the Young's modulus of the interphase, respectively. Since it is virtually impossible to provide exact values for the absolute thickness τ and the Young's modulus Ei of the interphase, the parameter B was determined from the experimental data using the following expression [17], derived from equation (3) Diffusion theory in elastomers [23] is based on the assumption that the swelling starts by the sorption of the liquid at the surface of the sample to a certain concentration equal to that attained by the whole sample at equilibrium; then the swelling proceeds by increasing the depth of the swollen layers. The relation between the average diffusion coefficient, Dav, and the penetration rate, P, is given by [24,25] :…”

Section: Young's Modulusmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Ion Beam and Carbon Black Filler Type on the Mechanical and Physico-Chemical Properties of Butadiene Acrylonitrile Rubber (NBR)

Hassan¹,

Aboud²,

El-Waily³

2016

IJSEA

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Five types of carbon black nanofillers, namely Intermediate Super-Abrasion Furnace ISAF (N220), High-Abrasion Furnace HAF-LS (N326), Fast Extruding Furnace FEF (N550), General Purpose Furnace GPF (N660) and Semi-Reinforcing Furnace SRF-HS (N774) were incorporated with butadiene acrylonitrile rubber (NBR) in order to improve its physical properties. Young's modulus was found to increase with nanofiller content. Percolation concentration was detected in mechanical as well as in Physico-chemical behavior.The experimental values of the normalized Young's modulus fit well with Pukanszky et al. model; taking into consideration the difference in carbon black-filler type. It is noticed that the characteristic time of swelling in toluene, τ is higher for NBR loaded with 30 phr ISAF and for the rest of samples it increases with increasing of particle size. Finally oxygen ion beam irradiation for percolative loading NBR nanocomposites increases Young's modulus nearly by 2-3 times.

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Mechanical Property Enhancement of Polymer Nanocomposites

Hocine

2010

Optimization of Polymer Nanocomposite Properties

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Mechanical properties of polyamide-12 layered silicate nanocomposites and their relations with structure

Cited by 74 publications

References 43 publications

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

Influence of Ion Beam and Carbon Black Filler Type on the Mechanical and Physico-Chemical Properties of Butadiene Acrylonitrile Rubber (NBR)

Mechanical Property Enhancement of Polymer Nanocomposites

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