Morphology Development of Polymer Blend With Different Viscosity Ratios Along an Extruder

2006 ◽  
Author(s):  
Han-Xiong Huang ◽  
Xiao-Jing Li ◽  
You-Fa Huang
Keyword(s):  
Polymer Blends ◽  
Polymer Blend ◽  
Polyamide 6 ◽  
High Viscosity ◽  
Morphology Evolution ◽  
Screw Extruder ◽  
Sampling Device ◽  
Low Viscosity ◽  
Single Screw Extruder ◽  
Morphology Development

The properties of polymer blends are largely determined by their morphology. So it is significant to investigate the morphology development of polymer blends during processing. In this work the morphology development of polymer blend was studied during flow along a single screw extruder. The polymer blend used incorporated polypropylene (PP) as its matrix phase and a high-viscosity or low-viscosity polyamide-6 (PA6) as the disperse phase. The samples of blends were taken from different positions using specially designed sampling device along the extruder online during the processing and were then examined using scanning electron microscopy (SEM). The morphology of the dispersed phase was quantitatively analyzed using image analysis software. The morphology evolution of blends along the melt conveying zone of screw was simulated. Theoretically predicted morphology evolution is in reasonable agreement with the experimental results. The aim of this work is to provide a better insight in the morphology development of blend during processing.

Melting of PP/PA6 Polymer Blends in Single Screw Extruders – An Experimental Study

2008 ◽  
Vol 587-588 ◽  
pp. 505-509 ◽  
Author(s):  
S.M. Cunha ◽  
António Gaspar-Cunha ◽  
José A. Covas
Keyword(s):  
Experimental Study ◽  
Polymer Blends ◽  
Polymer Blend ◽  
Screw Extruder ◽  
Immiscible Polymer Blend ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Single Screw Extruders ◽  
Melting Mechanism ◽  
Screw Extruders

A prototype modular single screw extruder fitted with a screw extracting device is used to monitor melting of an immiscible polymer blend (PP/PA6, with different weight ratios) in this widely used processing equipment. As anticipated, the phenomena observed are much more complex than those involved in extruding PP or PA6, when the well known Maddock/Tadmor mechanism is valid. Consequently a hybrid melting mechanism, involving Maddock/Tadmor and Dispersive melting sequences, is proposed.

scholarly journals CIRCULATORY HIGH-VISCOSITY NONNEWTONIAN FLUID FLOW IN A SINGLE-SCREW EXTRUDER CHANNEL

2016 ◽  
pp. 97-107
Author(s):  
Maria Andreevna PONOMAREVA ◽  
◽  
Maria Petrovna FILINA ◽  
Vladimir Albertovich YAKUTENOK ◽  
◽  
...  
Keyword(s):  
Fluid Flow ◽  
High Viscosity ◽  
Screw Extruder ◽  
Single Screw ◽  
Single Screw Extruder

scholarly journals Influence of the Phase Inversion on Mould-Shrinkage, Mechanical- and Burning Properties of Polymer Blend

2017 ◽  
Vol 885 ◽  
pp. 36-41 ◽  
Author(s):  
Károly Dobrovszky ◽  
Ferenc Ronkay
Keyword(s):  
Physical Properties ◽  
Polymer Blends ◽  
Tensile Properties ◽  
Polymer Blend ◽  
Phase Inversion ◽  
Viscosity Ratio ◽  
Screw Extruder ◽  
Binary Polymer ◽  
Mechanical And Physical Properties ◽  
Twin Screw

Blending polymers is an effective method to develop novel materials, tailoring the properties of the components. However, different morphology structures can be formed during the preparation, which could result in a wide diversity of mechanical and physical properties. The properties of polymer blends are most significantly influenced by the emerging range of phase inversion, which depends on the composition ratio and the viscosity ratio. In this paper various blends were prepared, utilizing polyethylene terephthalate (PET), polystyrene (PS) and two high density polyethylenes (HDPE), which differ in flowability. After preliminary homogenization by twin screw extruder, standard injection moulded specimen were prepared in order to present the effects of phase inversion on tensile properties, shrinkage and burning characteristics in binary polymer blends.

scholarly journals Effect of Polymer Blends on the Properties of Foamed Wood-Polymer Composites

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1971 ◽  
Author(s):  
Suwei Wang ◽  
Ping Xue ◽  
Mingyin Jia ◽  
Jing Tian ◽  
Run Zhang
Keyword(s):  
Polymer Blends ◽  
Wood Flour ◽  
Softening Temperature ◽  
Great Decrease ◽  
Screw Extruder ◽  
Single Screw Extruder ◽  
Wood Polymer ◽  
Twin Screw ◽  
Distribution Uniformity ◽  
The Impact

The polypropylene (PP)/wood flour (WF) composites were prepared using a co-rotating twin-screw extruder followed by a single-screw extruder foaming system in this paper. Polymers, such as polyolefin elastomer (POE), high-density polyethylene (HDPE) or microcrystalline wax, were blended with PP in the preparation of composites to improve the melt strength. And a cavity transfer mixer was introduced to increase the distribution uniformity of components in composites. Meanwhile, the effect of the polymer blends on the microstructure and mechanical properties of samples was investigated. The experimental results show that the addition of POE and HDPE resulted in the second melting peak in the differential scanning calorimeter (DSC) curves and a great decrease in the cell size was caused by the added POE. However, due to the velocity difference of composites in the die, the shape of bubbles gradually became irregular. Moreover, the impact strength of samples significantly increased by 85% for the added POE and the apparent density decreased by 6.7%. And the minimum Vicat softening temperature of 133.7 °C was obtained when the mass ratio of HDPE to PP was 4/6.

Experimental study of melting of polymer blends in a starve fed single screw extruder

2016 ◽  
Vol 56 (12) ◽  
pp. 1349-1356 ◽  
Author(s):  
Krzysztof J. Wilczyński ◽  
Adrian Lewandowski ◽  
Krzysztof Wilczyński
Keyword(s):  
Experimental Study ◽  
Polymer Blends ◽  
Screw Extruder ◽  
Single Screw ◽  
Single Screw Extruder

In-situ generation of polyamide-6 fibrils in polypropylene processed with a single screw extruder

1999 ◽  
Vol 39 (5) ◽  
pp. 881-886 ◽  
Author(s):  
Xuedong Li ◽  
Mingcai Chen ◽  
Yuhui Huang ◽  
Guangmin Cong
Keyword(s):  
Polyamide 6 ◽  
Screw Extruder ◽  
Single Screw ◽  
Single Screw Extruder ◽  
In Situ Generation
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