Dynamic rheology and morphology of HDPE‐fumed silica composites: Effect of interface modification

Nandi, Sangita; Bose, Sanjukta; Mitra, Susanta; Ghosh, Anup K.

doi:10.1002/pen.23299

Cited by 29 publications

(22 citation statements)

References 36 publications

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“…In contrast, the neat TPER composites were predominantly viscous in the terminal region. Similar results were also reported for high viscosity (hv-PP)-expanded graphite (EG) composites, high density polyethylene (HDPE)-fumed silica composites, and polypropylene-carbon nanofiber (CNF-PS-XT grade) composites (Nandi et al 2013;Paleo et al 2015;Piontech et al 2015).…”

Section: Resultssupporting

confidence: 75%

“…The phase angle (δ) results versus the complex modulus (G*) are shown in the Van Gurp-Palmen plot, which identifies the rheological percolation for the UFC-filled composites (Fig. 3d) (Nandi et al 2013;Paleo et al 2015;Piontech et al 2015). Figure 3d shows that the polymer chains were entirely relaxed at approximately 75° for δ in the low G* region, and a continuous reduction in δ occurred with increasing G* for neat TPER and UFC-filled composites.…”

Section: Resultsmentioning

confidence: 93%

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Rheological and Mechanical Properties of Ultra-fine Cellulose-Filled Thermoplastic Epoxy Composites

2016

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a Thermoplastic epoxy resin (TPER)-based composites containing different amounts of ultra-fine cellulose (UFC) were prepared via melt compounding and injection molding. The effect of UFC loading on the mechanical properties and dynamic rheological behavior of the UFC-filled TPER composites was analyzed. The UFC-filled composites displayed higher complex viscosities than those of the neat TPER composites, especially at low frequencies. The elastic modulus of the 20 wt.% UFC-filled composite was up to 6-and 2-fold higher than that of TPER at 0.1 and 100 Hz, respectively. The loss factor decreased over the entire frequency range with the incorporation of UFC. The tensile modulus of elasticity (TMOE) of neat TPER was 3.13 GPa, and it increased as a function of UFC loading. The neat TPER exhibited the lowest flexural strength (108.1 MPa), and the flexural strength increased by 14% with the incorporation of 20 wt.% UFC. The results of the TMOE and the flexural modulus of elasticity (FMOE) were in agreement with rheological data on complex viscosity, elastic modulus, and viscous modulus. Ultra-fine cellulose-filled TPER composites may provide special capabilities for automotive applications and may also meet requirements for end-of-life vehicle (ELV) directives.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 93%

Rheological and Mechanical Properties of Ultra-fine Cellulose-Filled Thermoplastic Epoxy Composites

2016

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“…from 0.03 to 0.04 Hz) was observed at 5 wt% of RGO loading (PMMA-5). A similar kind of behavior was also reported in the case of High Density Polyethylene (HDPE)-fumed silica composite by Ghosh et al [37] The complex viscosities of PMMA/RGO nanocomposites as a function of angular frequency are shown in Fig. 7.…”

Section: Rheological Characterization Of Pmma/rgo Nanocompositessupporting

confidence: 70%

Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

Tripathi

Malik

Choudhary

2015

Polymers for Advanced Techs

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Thermomechanical and rheological behavior of poly(methyl methacrylate) (PMMA)/reduced graphene oxide (RGO) nanocomposites prepared via in situ polymerization using sheet casting method was investigated. Scanning electron microscope and transmission electron microscope were used to study the microstructure of nanocomposites in terms of dispersion of RGO and polymer-RGO interaction. The thermomechanical properties were investigated using dynamic mechanical analyzer, and it was found that the incorporation of RGO sheets into PMMA matrix resulted in an increase in both storage modulus and glass transition temperature (T g ) as compared with neat PMMA. Storage modulus showed an increase of 40% and 46% at a loading of 0.5 and 1.0 wt% RGO, respectively. The glass transition temperature showed an increase of 20°C (104°C for neat PMMA) at RGO loading of 2.0 wt% (124°C for sample PMMA-2.0). The complex viscosity and moduli (storage and loss) as a function of angular frequency also showed an increase with increasing amount of RGO. A significant increase in melt viscosity of PMMA observed in case of sample having 0.5 wt% RGO (sample PMMA-0.5) could be due to the formation of interconnected network of RGO in PMMA matrix and can be considered as rheological percolation threshold. A drop in the crossover frequency was registered with increase of RGO loading that does not directly correlate with the percolation threshold concentration, representing an increase in solid-like behavior. Secondly, the complex viscosity did not change with RGO loading at higher frequency, which showed that the short-range PMMA relaxations were unaffected by RGO.

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“…From the previous studies on polymer nanocomposites, it has been proved that when the nanofillers are added to polymer, they would have a tendency to form a network‐like structure within the polymer matrix due to the presence of surface silanol groups. In this network‐like structure either they are remained in very close vicinity to each other or physically attached to each other.…”

Section: Resultsmentioning

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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Dynamic rheology and morphology of HDPE‐fumed silica composites: Effect of interface modification

Cited by 29 publications

References 36 publications

Rheological and Mechanical Properties of Ultra-fine Cellulose-Filled Thermoplastic Epoxy Composites

Rheological and Mechanical Properties of Ultra-fine Cellulose-Filled Thermoplastic Epoxy Composites

Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

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

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