Micro-mechanisms of deformation in polyethylene/clay micro- and nanocomposites

Stoeffler, Karen; Lafleur, Pierre G.; Perrin‐Sarazin, Florence; Bureau, Martin; Denault, J.

doi:10.1016/j.compositesa.2011.03.020

Cited by 23 publications

(19 citation statements)

References 28 publications

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“…Maleated polyolefins were used to improve interfacial adhesion between nonpolar PE and polar MMT in publication. 36 It was established that the values of ultimate elongation of systems with and without the compatibilizers are close, which confirms the assumption about domineering influence of matrix polymer properties.…”

Section: Article Wileyonlinelibrarycom/appsupporting

confidence: 51%

Tensile behavior of polyolefin composites: the effect of matrix parameters

Guseva

Gerasin

Shklyaruk

2016

J of Applied Polymer Sci

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Polyolefin composites were prepared from 14 PE matrices and three different mineral fillers (montmorillonite, palygorskite and glass microspheres) via melt compounding in an extruder. Mechanical properties of the obtained systems were analyzed with emphasis on elongation at break and conditions for ductile/brittle failure were determined. When filler content is raised beyond a certain "critical" value, tensile properties are dramatically altered and transition occurs from ductile behavior to brittle fracture. This transition is displayed by a well-defined "step" on the plot of strain at break versus concentration of particles. The value of "critical filler content" was found to depend mainly on level of crystallinity of a matrix while other parameters (chemical nature of filler particles, their size, shape and surface treatment) are less significant. "Critical filler content" will decrease with growth of crystallinity of a polymer and with highly crystalline HDPEs it is as low as 2-8 vol %. Otherwise, with noncrystallizing and low-crystalline polymers elongation at break decreases gradually with concentration of mineral particles and ductile type deformation is maintained at fairly large filler fractions. The results presented here will be useful for a proper selection of a matrix polymer in composites with mineral fillers.

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Section: Article Wileyonlinelibrarycom/appsupporting

confidence: 51%

Tensile behavior of polyolefin composites: the effect of matrix parameters

Guseva

Gerasin

Shklyaruk

2016

J of Applied Polymer Sci

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“…However, there are other researchers who believed that increasing of the cavitations in elastomeric matrices at the blend interfaces, crack bridging, crack pinning, and bifurcation induced by the nanofiller particles as well as their orientation along to the tensile direction are responsible for this improvement in strain at break of the nanocomposites . It was also suggested that for both semicrystalline and amorphous polymers the mobility of OMMT results in the increase of tensile properties of the nanocomposites compared to that of the matrix alone …”

Section: Resultsmentioning

confidence: 99%

“…As a matter of fact, matrix flexibility is responsible for orientation of OMMT layers in the direction of stress . It has also been suggested that the role of intercalated morphology, in flexible matrix, which allow the matrix molecules to slip and the microcracks that cannot propagate easily in such matrices should also be taken in to account. It was found that both stress and strain at break are decreased with the addition of higher amount of OMMT (greater than 5 wt%).…”

Section: Resultsmentioning

confidence: 99%

Effect of Organoclay Ordering and Agglomeration on Morphology and Mechanical Properties of Uncured and Dynamically Cured Ethylene‐Octene Copolymer Nanocomposites

Razavi‐Nouri

Sabet

Tayefi

et al. 2016

Macro Materials & Eng

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In this work, the effects of organoclay (OMMT) and cross‐linking agent on thermal and mechanical properties as well as the morphology of dynamically cured nanocomposites based on ethylene‐octene copolymer are studied. The nanocomposites containing 1, 3, 5, and 7 wt% OMMT are first prepared and then cured with 0.5 and 1 wt% dicumyl peroxide. Low angle X‐ray scattering and transmission electron microscopy reveal that the size of clay tactoids is increased with the increase of OMMT content within the nanocomposites especially for the uncross‐linked matrix. In addition, the distance between adjacent clay layers is increased for the cured nanocomposites containing 1 and 3 wt% OMMT, however, it remains relatively unchanged for higher amounts of the nanofiller. In uncross‐linked systems, the nanocomposites containing up to 5 wt% OMMT exhibit a remarkable enhancement in stress and strain at break compared to that of the matrix alone. With the addition of further OMMT content, although the stress and strain at break are both decreased, still remained much higher than that of the pristine copolymer. A mechanism is also proposed to compare the microstructure of the uncured and cured nanocomposites before and after stretching.

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“…HDPE has a similar structure to UHMWPE but with lower molecular chain length, however, it exhibits lower wear resistance, yield strength and toughness than UHMWPE (Kelly, 2002). This reduction in performance on adding HDPE to UHMWPE can potentially be mitigated, whilst retaining the improved processability, by the addition of nanoreinforcement, which has been shown to improve the mechanical performance of polyethylene (Chen et al, 2012;Ren et al, 2012;Kontou and Niaounakis, 2006;Zoo et al, 2004;Zhenhua and Yunxuan, 2012;Stoeffler et al, 2011;Tang et al, 2003;Kanagaraj et al, 2007;Alghamdi et al, 2013a;b;2015).…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

Alghamdi

2017

Int. j. adv. appl. sci

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The purpose of this paper is to investigate the effect of nanoparticle type on the scratch resistance of polyethylene-based nanocomposites at two ambient temperatures and various scratch velocities. An in-house pre-mix procedure is used to enhance the scratch resistance of polyethylene blend by the addition of three different types of nanoparticles, which are compatible with the host matrix. The results showed a good dispersion of nanoparticles into the host material matrix. The scratch resistance of polyethylene-based nanocomposites is significantly influenced by the type of nanoparticles at both testing temperatures. The addition of low volume fraction (0.5 wt.%) of nanoclay and CNT showed a significant increase in the scratch resistance of nanocomposite material at the highest scratching velocity for both testing temperatures. While, slight effect of the embedding of nanoclay was indicated at low scratch velocity. The addition of 0.5 wt% CB resulted in a reduction in the scratch resistance at all testing parameters.

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Micro-mechanisms of deformation in polyethylene/clay micro- and nanocomposites

Cited by 23 publications

References 28 publications

Tensile behavior of polyolefin composites: the effect of matrix parameters

Tensile behavior of polyolefin composites: the effect of matrix parameters

Effect of Organoclay Ordering and Agglomeration on Morphology and Mechanical Properties of Uncured and Dynamically Cured Ethylene‐Octene Copolymer Nanocomposites

Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

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