Correlation of rheology and morphology and estimation of interfacial tension of immiscible COC/EVA blends

Jafari, Seyed Hassan; Hesabi, Mohammadnabi; Khonakdar, Hossein Ali; Asl-Rahimi, Mohsen

doi:10.1007/s10965-010-9479-0

Cited by 32 publications

(49 citation statements)

References 34 publications

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“…In general, a positive deviation from mixing rule over complete composition range is an indication for an enhanced compatibility. On the other hand, some noticed achieving partial compatibility in case of negative deviation from the additive rule, depending on dynamic asymmetry and viscosities of the parent polymers . For 75/25 MHDPE‐ x /EVOH (or PA‐6) compatibilized blends, increase of x was responsible for a viscosity upturn.…”

Section: Resultsmentioning

confidence: 99%

Looking back to interfacial tension prediction in the compatibilized polymer blends: Discrepancies between theories and experiments

Asl

Saeb

Jafari

et al. 2018

J of Applied Polymer Sci

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Prediction of interfacial tension of compatibilized polymer blends is a challenging open problem, where experiments and theories hardly support each other. In this work, constitutive models proposed for quantifying the interfacial tension of compatibilized polymer blends were revisited and their limitations/capabilities were discussed. In view of available data in the literature, which could provide with possibility of comparison between interfacial tension values obtained in this work and those published before, high‐density polyethylene (HDPE)/polyamide‐6 and HDPE/polyethylene‐co‐vinyl alcohol pairs comprising varying amounts of HDPE‐g‐maleic anhydride compatibilizer precursor were prepared for obtaining model parameters. The inability of theories in monitoring the interfacial tension was accordingly uncovered. However, outcomes from both theoretical and experimental data provided some insights for elucidating the interplay between interfacial tension and rheological characteristics of the studied compatibilized blends. It was also attempted to uncover the relationships between particle size, particle size distribution, and rheological properties of blends compatibilized with different amounts of HDPE‐g‐maleic anhydride precursor. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46144.

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Section: Resultsmentioning

confidence: 99%

Looking back to interfacial tension prediction in the compatibilized polymer blends: Discrepancies between theories and experiments

Asl

Saeb

Jafari

et al. 2018

J of Applied Polymer Sci

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“…The several plotting techniques such as the Han plot, Cole–Cole Plot, and Van Gurp–Palmen plot have been proposed to examine the miscibility of the blends using linear viscoelastic data . One can use the Han plot to study the miscibility of the polymer blends via their rheological properties.…”

Section: Resultsmentioning

confidence: 99%

Rheology and morphology study of immiscible linear low‐density polyethylene/poly(lactic acid) blends filled with nanosilica particles

Hoseini

Haghtalab

Famili

2017

J of Applied Polymer Sci

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The objectives of this study are to investigate the effect of silica nanoparticles on the morphology and rheological behavior of immiscible linear low‐density polyethylene/poly(lactic acid) (LLDPE/PLA) blends. Melt blending method is applied to prepare the blends and their nanocomposites. Scanning electron microscope and parallel plate rheometer were used to investigate morphology and rheological behavior of the blend nanocomposites. Scanning electron microscope results demonstrated a significant change in morphology behavior by incorporation of silica nanoparticles. A significant reduction in the PLA droplet for LLDPE/PLA (75/25) with 8 wt % silica was observed. The rheological studies illustrated that for all samples storage modulus and complex viscosity of blend nanocomposites are higher than neat blends. Finally, melt rigidity of blend nanocomposites was estimated by measurement of rheological properties using a rotational rheometer through small amplitude oscillatory shear experiments. As a result, through the shear data, a high value quantity as a criteria for melt rigidity is obtained for the LLDPE/PLA (75/25) with 8 wt % silica in comparing to the other samples. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45526.

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“…The activation energy may then be obtained from the heating rate-reciprocal temperature plot slope. Figure 8 shows (1) temperature at which degradation begins (2) temperature at which maximum rate of weight loss occurs (3) activation energy of decomposition Fig. 8 Weight loss scans of pure COC at different heating rates in nitrogen Fig.…”

Section: Thermogravimetrymentioning

confidence: 99%

“…Cyclic Olefin Copolymers (COC)s are a novel class of amorphous polyolefins which contain cyclic and linear olefin units in their molecular structure polymerized from norbornene and ethylene with an aid of metallocene catalyst [1,2]. A combination of optical, mechanical, and electrical properties has placed this class of materials into spotlight.…”

Section: Introductionmentioning

confidence: 99%

Cyclic olefin copolymer/layered silicate nanocomposite: solid and melt viscoelastic properties and degradation behavior

et al. 2012

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Organoclay nanocomposites based on cyclic olefin copolymer (COC) with various contents of layered silicate nanoparticles were prepared via melt blending. The influence of processing conditions and nanoclay content on solid state viscoelastic and melt rheological properties as well as thermal degradation behavior was studied. The state of dispersion was investigated using X-ray diffraction technique which showed a strong dependence on composition, where an exfoliated morphology was identified in high nanoclay loading. Besides, the processing conditions, i.e., screw rotation speed and mixing time were also found to strongly influence the state of nanophase dispersion. The rheological investigations revealed a remarkable increase in storage shear modulus and complex viscosity values upon nanoclay incorporation. Furthermore, dynamic mechanical analysis gave an evidence of increasing stiffness after nanoclay was added into COC matrix; however, no detectable change in glass transition peak was brought about. The results from thermogravimetry also exhibited a rising trend in thermal stability values as nanophase organoclay was incorporated, for which the random chain scission was suggested as the prevailing mechanism based on a theoretical analysis.

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Correlation of rheology and morphology and estimation of interfacial tension of immiscible COC/EVA blends

Cited by 32 publications

References 34 publications

Looking back to interfacial tension prediction in the compatibilized polymer blends: Discrepancies between theories and experiments

Looking back to interfacial tension prediction in the compatibilized polymer blends: Discrepancies between theories and experiments

Rheology and morphology study of immiscible linear low‐density polyethylene/poly(lactic acid) blends filled with nanosilica particles

Cyclic olefin copolymer/layered silicate nanocomposite: solid and melt viscoelastic properties and degradation behavior

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