Synthesis and characterization of linear low‐density polyethylene/sepiolite nanocomposites

Shafiq, Muhammad; Yasin, Tariq; Saeed, Shaukat

doi:10.1002/app.34633

Cited by 61 publications

(32 citation statements)

References 20 publications

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“…It has been reported that this stepwise mass loss in sepiolite is due to the loss of adsorbed and zeolitic water, the loss of rst and second structural water and the release of water through dehydroxylation. 24 It was observed that the thermal stability of composites is higher than that of pristine HDPE (Fig. 10a).…”

Section: Thermogravimetric Analysismentioning

confidence: 92%

High-density polyethylene/needle-like sepiolite clay nanocomposites: effect of functionalized polymers on the dispersion of nanofiller, melt extensional and mechanical properties

et al. 2016

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The present article reports the preparation of high density polyethylene (HDPE)/sepiolite-clay nanocomposites with improved mechanical performance and melt extensional properties by melt compounding using a co-rotating twin screw extruder. Maleic anhydride grafted high density polyethylene (HDPE-g-MA) (having different MFI and maleic anhydride content) was used as compatibiliser to investigate systematically the effect of polarity and molecular weight on the properties of HDPE/sepiolite nanocomposites. The influence of sepiolite loading (1-10 wt%) and type of compatibilizer on morphological, mechanical and melt extensional properties (melt strength, drawability and extensional viscosity) were investigated and analyzed. Sepiolite-clay significantly enhanced the mechanical properties, melt strength and extensional viscosity with slight reduction in drawability at 10% w/w loading. For example, $40% increase in tensile modulus and $50% improvement in flexural modulus was obtained at 10% w/w sepiolite loading. The compatibiliser having lower MFI showed significant improvement in melt extensional properties as compared to compatibiliser having higher MFI.Scanning electron microscopy and transmission electron microscopy revealed the better dispersion of sepiolite in the presence of compatibiliser, however it was much better when HDPE-g-MA having higher MFI was used as compared to compatibiliser having lower MFI. Thermal stability increased in the presence of sepiolite which was further improved in the presence of compatibiliser.

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Section: Thermogravimetric Analysismentioning

confidence: 92%

High-density polyethylene/needle-like sepiolite clay nanocomposites: effect of functionalized polymers on the dispersion of nanofiller, melt extensional and mechanical properties

et al. 2016

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“…Among nanofillers, sepiolite is a low cost acicular shape clay nanoparticle with high specific surface area and excellent sorption properties, good mechanical strength and thermal stability, offering an ideal reinforcement for polymer matrices. Thus, PE ‐ sepiolite nanocomposites are very interesting materials because they can combine the excellent mechanical properties of this polymer with the high sorption capacity of sepiolite for developing textile fibers with higher absorbency and odor neutralization . Moreover, in the specific case of clay nanoparticles, the modification of barrier properties, water absorption and the biocide activity of the material can be also achieved .…”

Section: Introductionmentioning

confidence: 99%

Polyethylene/sepiolite fibers. Influence of drawing and nanofiller content on the crystal morphology and mechanical properties

Alonso

Martini

Iannoni

et al. 2014

Polymer Engineering & Sci

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The influence of sepiolite content (1, 2, and 3 wt%) and successive drawing steps on the final properties of polyethylene/sepiolite nanocomposite fibers are reported. Particularly the effects of these variables on crystallinity, fiber macroscopic morphology, and tensile mechanical properties are analyzed applying different experimental techniques: differential scanning calorimetry, wide angle x‐ray diffraction, scanning electronic microscopy, and tensile mechanical characterization. The study evidenced the important role of both sepiolite content and stretching on the crystalline morphology and mechanical properties of the nanocomposites fiber. Both variables favor the appearance of the monoclinic phase during polyethylene crystallization, and produce an increase of crystallinity degree (35 % with drawing steps and 10 % by the sepiolite incorporation in non drawing fiber). This change of crystal morphology influences mechanical properties enhancing with both sepiolite content and drawing steps. Thus, Young Modulus increases 17 times with drawing in pure PE fibers and 1.5 times because sepiolite presence. The strength shows similar behavior, but the elongation at break decreases 14 timed with draw steps and to a half by the sepiolite influence. The final properties of drawing nanocomposite fibers are so acceptable for textile applications and they content particles that enhance their moisture and odors absorptive capacities. POLYM. ENG. SCI., 55:1096–1103, 2015. © 2014 Society of Plastics Engineers

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“…(4) Increased surface area for chemical attack. 18,19 In this work, three approaches were simultaneously used to improve the thermal, mechanical and rheological behavior of linear low-density polyethylene (LLDPE)/starch/sepiolite composite. The only drawback of such biodegradable composites is the compatibility of its constituents.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 It has also been used in small quantity to improve the mechanical properties of polymers. 18,19 In this work, three approaches were simultaneously used to improve the thermal, mechanical and rheological behavior of linear low-density polyethylene (LLDPE)/starch/sepiolite composite. First, the materials were prepared by peroxide initiated melt mixing technique, which avoids the use of organic solvent.…”

Section: Introductionmentioning

confidence: 99%

Thermal and rheological effects of sepiolite in linear low‐density polyethylene/starch blend

Mir¹,

Yasin²,

Halley³

et al. 2012

J of Applied Polymer Sci

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Effect of different concentrations of sepiolite on thermal and rheological properties of linear low-density polyethylene/ starch blend was investigated. Vinyl trimethoxy silane was used as compatibilizing and crosslinking agent. The composites were produced by peroxide-initiated melt mixing technique. Improved thermal stability and tensile strength were observed in crosslinked formulations. Maximum tensile properties were observed in composites containing 2 parts per hundred (phr) sepiolite and 15 phr starch. Rheological study of crosslinked composite showed a linear viscoelastic behavior with high complex viscosity and dynamic shear storage modulus. Scanning electron microscopy also revealed that silane has improved the dispersion of filler and interaction among the polymer and filler interphase. These results suggest that the presence of sepiolite act as an effective filler to enhance the thermal and rheological properties.

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Synthesis and characterization of linear low‐density polyethylene/sepiolite nanocomposites

Cited by 61 publications

References 20 publications

High-density polyethylene/needle-like sepiolite clay nanocomposites: effect of functionalized polymers on the dispersion of nanofiller, melt extensional and mechanical properties

High-density polyethylene/needle-like sepiolite clay nanocomposites: effect of functionalized polymers on the dispersion of nanofiller, melt extensional and mechanical properties

Polyethylene/sepiolite fibers. Influence of drawing and nanofiller content on the crystal morphology and mechanical properties

Thermal and rheological effects of sepiolite in linear low‐density polyethylene/starch blend

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