Structural characterization of high-density polyethylene nanocomposites: effect of compatibilizer type and high aspect ratio organoclay platelets

Mohamadi, Mahboube; Garmabi, Hamid; Keshavarzi, Fatemeh

doi:10.1007/s00289-014-1219-x

Cited by 12 publications

(13 citation statements)

References 39 publications

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“…Recently Mohamadi et al and Bilotti et al explored the effects of compatibilizer polarity and molecular weight on the state of nanoclay dispersion in HDPE/uoromica nanocomposites and PP/sepiolite nanocomposites respectively. 12,13 So far, most of the literature regarding clay nanocomposites has been focused on platelet-like clays, such as MMT. 3,7,8 The present study deals with sepiolite, which is a needle like brous nanoller with open channels extended longitudinally in the ber direction with hydrated magnesium silicate having the unit cell formula, Mg 4 Si 6 O 15 (OH) 2 $6H 2 O.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…A high degree of clay dispersion was achieved with the high molecular weight compatibilizers, whereas the addition of low molecular weight compatibilizer resulted in highly swollen clay aggregates. In past few years, myriads of research reports have been accomplished to explore the influence of compatibilizer molecular weight and polarity on the state of nanoclay dispersion in different polymeric nanocomposites . So far, most of the research related to polymer/clay nanocomposites has been carried out on platelet‐like clays, such as montmorillonite.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene/sepiolite clay nanocomposites: Effect of clay content, compatibilizer polarity, and molar mass on viscoelastic and dynamic mechanical properties

Singh

Vimal

Sharma

et al. 2017

J of Applied Polymer Sci

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In this work, high-density polyethylene (HDPE)-based nanocomposites having different concentrations of Sepiolite (1-10 wt %) and compatibilizer, that is, PE-graft-maleic anhydride (PE-g-MA) of varying molecular weight and maleic anhydride content were prepared by melt compounding. The influence of Sepiolite amount and compatibilizer polarity and molar mass on the crystallization behavior [differential scanning calorimeter (DSC) and X-ray diffraction (XRD)], rheological properties (oscillatory rheometer) and dimensional stability [dynamic mechanical analyzer (DMA) and heat deflection temperature (HDT)] of the nanocomposites was investigated. It was found that Sepiolite did not affect the crystallization behavior of HDPE. The rheological results show that the incorporation of Sepiolite into HDPE matrix up to 10 wt % increases the complex viscosity of polymer. Storage modulus and loss modulus both in oscillatory rheometry and in DMA were highest for nanocomposite prepared using 10 wt % Sepiolite owing to the improved mechanical restrain by the dispersed phase. In the presence of compatibilizer, the values of storage modulus and loss modulus were lower as compared to uncompatibilized nanocomposites at same loading of Sepiolite. The reduction in modulus is more pronounced in composites prepared using compatibilizer of lower molar mass as compared to those prepared using higher molar mass compatibilizer.

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“…In this case, polyethylene (PE) has special position because of low cost, easy availability, light weight, high corrosion, chemical resistance, etc. which makes vast usage in different fields . One of the main deficiencies of PE is depressed critical physical properties at the elevated temperatures, which limits its applications.…”

Section: Introductionmentioning

confidence: 99%

Crystallization, melting, and mechanical behavior of calcium carbonate‐based nanocomposites of crosslinked high density polyethylene

2016

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In this work, novel nanocomposites of silane crosslinked high density polyethylene (PEX) and nano-sized calcium carbonate (NCC) were prepared using a labscale corotating twin screw extruder. Thermal analysis, which was carried out through differential scanning calorimetry demonstrates reduction of crystallinity index and specific heat capacity of PEX by adding NCC content, while an ascending trend was observed for crystallization rate and no important change was found for growth dimension of the crystalline lamellaes. The results of mechanical analysis show enhancement of tensile modulus compared to neat PEX by adding 10 wt% of NCCs which is attributed to good matrix/ filler adhesion. On the other hand, yield tensile strength showed inverse trend while elongation at break increased gradually by adding filler up to 5 wt% NCCs and then decreased at higher filler contents due to agglomeration of NCC particles. The Counto model was used to predict the tensile modulus of nanocomposites, successfully. POLYM. COMPOS., 00:000-000, 2016.

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Structural characterization of high-density polyethylene nanocomposites: effect of compatibilizer type and high aspect ratio organoclay platelets

Cited by 12 publications

References 39 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 clay nanocomposites: Effect of clay content, compatibilizer polarity, and molar mass on viscoelastic and dynamic mechanical properties

Crystallization, melting, and mechanical behavior of calcium carbonate‐based nanocomposites of crosslinked high density polyethylene

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