Experimental and numerical study on transient elongational viscosity for PP/LDPE blends

Otsuki, Yasuhiko; Fujii, Yoko; Sasaki, Hiroko; Phulkerd, Panitha; Yamaguchi, Masayuki

doi:10.1038/s41428-019-0286-0

Cited by 11 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is currently one of the main purposes of employing polymer blends. Their purposes can roughly be classified into two categories: (1) to provide strain hardening in the transient elongational viscosity [ 23‐31 ] and (2) to decrease the shear viscosity to enhance flowability. In the latter case, adding low‐molecular‐weight compounds has been employed as a conventional method, which largely reduces the shear viscosity in the low shear rate region.…”

Section: Introductionmentioning

confidence: 99%

Viscosity decrease by interfacial slippage between immiscible polymers

Moonprasith

Nasri

Saari

et al. 2021

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

The rheological behavior under pressure‐driven shear flow was studied using binary blends with a sea‐island structure. The addition of a low‐viscosity dispersion having a high interfacial tension with the continuous phase greatly reduces the shear viscosity, for example, the addition of atactic polystyrene (PS) with a low viscosity to isotactic polypropylene (PP) and the addition of PP with a low viscosity to PS. The interfacial slippage occurs because of the poor adhesive strength with the enlarged interfacial area and is responsible for the viscosity decrease. When the dispersion has a similar viscosity to the continuous phase, the viscosity decrease is barely detected. This is because the deformation of dispersed droplets is restricted, which creates a small interfacial area. The interfacial tension between the continuous and dispersed phases plays a crucial role on the shear viscosity. In the case of PP, the addition of linear low‐density polyethylene with a relatively low interfacial tension to PP has almost no impact on the shear viscosity. This is despite the polyethylene having a low viscosity.

show abstract

Section: Introductionmentioning

confidence: 99%

Viscosity decrease by interfacial slippage between immiscible polymers

Moonprasith

Nasri

Saari

et al. 2021

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The addition of rubbery materials to enhance the mechanical toughness is another major target for polymer blends. [1][2][3][4] Although various blend techniques have been proposed recently to improve the processability, [5][6][7][8][9][10][11] there is still a strong need to reduce the shear viscosity, especially for injection molding of engineering plastics.…”

Section: Introductionmentioning

confidence: 99%

Effect of morphology on shear viscosity for binary blends of polycarbonate and polystyrene

Tanaka

Sako

Hiraoka

et al. 2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The structure and rheological properties of binary blends of polycarbonate (PC) and polystyrene (PS) were investigated using various PS samples with different molecular weights, namely PS1k (Mw = 1,000), PS53k (Mw = 53,000), and PS240k (Mw = 240,000). The blends with PS53k and PS240k show phase‐separated structures, whereas the blend with PS1k is miscible. The shear viscosity decreases greatly on addition of PS53k and PS240k, especially at high shear rates, which would be a great advantage at processing operations. Because the nonlinear response occurs in the small strain region for multilayered films of PC and PS240k, the origin of the significant viscosity drop for the phase‐separated system is interfacial slippage at the phase boundary.

show abstract

“…PS is one of the most important thermoplastics due to its appropriate flowability, electrical insulation, mechanical properties, and transparency. [10][11][12][13][14] It can be easily blow molded, extruded, or injected, thus, these features make it a very valuable manufacturing polymer. [15][16][17] Among the various applications of PS are foam packaging, food packaging, cups, disposable plates, silverware, cassettes, and CDs.…”

Section: Introductionmentioning

confidence: 99%

“…Polyvinyl chloride, polypropylene, polyethylene, and polystyrene (PS) are the most utilized thermoplastics in producing polymer blends. PS is one of the most important thermoplastics due to its appropriate flowability, electrical insulation, mechanical properties, and transparency 10–14 . It can be easily blow molded, extruded, or injected, thus, these features make it a very valuable manufacturing polymer 15–17 .…”

Section: Introductionmentioning

confidence: 99%

Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Tayouri

Mousavi

Estaji

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

Polystyrene/polyolefin elastomer (PS/POE) (90/10 and 80/20 wt/wt) blends containing 1, 3, and 5 phr halloysite nanotubes (HNTs) in the presence and absence of a compatibilizer (polypropylene-graft-maleic anhydride) were prepared using the meltmixing technique. Scanning electron microscopic studies confirmed a matrix-droplet morphology. Energy dispersive spectroscopy (EDS) mapping indicated that the blends containing 5 phr HNTs possessed aggregates, while no agglomeration was observed after incorporating 5 phr compatibilizer. Thermal stability and thermal degradation kinetics were investigated using thermogravimetry analysis (TGA). The results demonstrated that the PS/POE blend (90/10) containing 5 phr HNTs and compatibilizer (90/10/5/5) has the best thermal stability. Different methods such as Friedman, Flynn-Ozawa-Wall, and Kissinger-Akahira-Sunose were applied to calculate the degradation activation energy. The 90/10/5/5 nanocomposite exhibited the highest degradation activation energy, indicating that this sample is more difficult to degrade thermally than other samples. A correlation was obtained between the activation energy and the intensity of the TGA-fourier-transform infrared spectroscopy (TGA/FTIR) peaks of the evolved products. The Criado method was used to determine the changes in the thermal degradation mechanism of the samples.

show abstract

Experimental and numerical study on transient elongational viscosity for PP/LDPE blends

Cited by 11 publications

References 37 publications

Viscosity decrease by interfacial slippage between immiscible polymers

Viscosity decrease by interfacial slippage between immiscible polymers

Effect of morphology on shear viscosity for binary blends of polycarbonate and polystyrene

Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Contact Info

Product

Resources

About