Morphology study of immiscible polymer blends in a vane extruder

Qu, Jinping; Chen, Hui-Zhuo; Liu, Shurong; Tan, Bin; Liu, Liming; Yin, Xianze; Liu, Quanjin; Guo, Rui-biao

doi:10.1002/app.38573

Cited by 51 publications

(39 citation statements)

References 35 publications

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“…At present, a number of reports [12][13][14][15][16] have been dedicated to the study of the resulting elongational flow. Furthermore, Qu et al [17,18] have proved that a vane extruder can cause a material to undergo large elongational deformation and has better efficiency of disperse mixing by numerous experiments. In this article, the mixing characteristics are theoretically derived.…”

Section: Introductionmentioning

confidence: 99%

Total Strain of Newtonian Fluids in a Vane Extruder

Huang

Geng

et al. 2014

Journal of Macromolecular Science, Part B

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The vane extruder, which makes a polymer suffer elongation stress much larger than shearing stress, is an innovational equipment in polymer processing. A physical model and a mathematical model are established to analyze the mixing characteristics in polymer processing, namely, the two important functions of residence time distribution and strain distribution function are obtained. It is shown that the direction of total strain gradient is consistent with the orientation of the material flow. The results show that the vane extruder has an advantage over traditional screw extruders due to it being based on elongational rheology.

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Section: Introductionmentioning

confidence: 99%

Total Strain of Newtonian Fluids in a Vane Extruder

Huang

Geng

et al. 2014

Journal of Macromolecular Science, Part B

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“…In this study, PLA was blended with PP using a novel vane extruder based on an elongation force field with better mixing effect [28,29] and the mechanical properties, morphologies, crystallization behavior and thermal stability of the blends were investigated. Furthermore, the compatibilizers, maleic anhydride-grafted PP (MAPP) and ethylene/ n -butyl acrylate/glycidyl methacrylate terpolymer (PTW), were applied to improve the compatibility between PLA and PP in the blends.…”

Section: Introductionmentioning

confidence: 99%

Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior

Chen

Zou

Zhang

et al. 2015

Journal of Polymer Engineering

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Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior Abstract: Poly(lactic acid) (PLA)/polypropylene (PP) blends with different weight fractions were prepared by a novel vane extruder. The mechanical properties, morphology, crystallization behavior and thermal stability of the blends were investigated. The tensile strength, flexural strength and elongation at break decreased nonlinearly when the PP content was not more than 50 wt% and then increased with an increase in the PP content. The flexural modulus decreased with increasing PP weight fraction. The PLA/PP 90:10 blend exhibited the optimum impact strength. Scanning electron microscopy measurements revealed that the PLA/PP blends were immiscible. Phase separation occurred significantly at a blend ratio of 50:50. Regarding the PLA/PP 90:10 blend, the mean diameter of the disperse-phase PP particles was the smallest at 1.11 μ m. Differential scanning calorimetry measurements showed that low content of PP enhanced the crystallization of PLA. The PLA component in the blends impeded the crystallization of PP when PP was used as the matrix. The thermogravimetric analysis measurement involved a two-step decomposition process of the blends. The thermal resistance of the blends was improved by compounding with PP. As compatibilizers, both the maleic anhydride-grafted PP and the ethylene/ n -butyl acrylate/ glycidyl methacrylate terpolymer helped improve the mechanical properties, crystallization property and thermal resistance of the PLA/PP blends.

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“…Recent research results have shown that vane extruder (VE) composed of several vane plasticizing conveying units 23 is based on the positive displacement conveying mechanism dominated by extensional deformation, which has many advantages such as stable output, better dispersive, and distributive mixing, reduced melt temperature, wide adaptability. The morphology development [24][25][26] of polymer blends was studied on this type of extruder. The results show that the extensional deformation generated in this type of VE can improve the mixing performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Extrusion Characteristic of a Vane Extruder Based on Extensional Flow

Yin

et al. 2015

Adv Polym Technol

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ABSTRACT:Experiments were carried out to study the extrusion characteristics of a vane extruder based on extensional flow.The effects of rotor speed and die pressure on output were studied and compared with a single screw extruder. The responses of melt pressure to rotor speed and die pressure were also studied in real timescale. Experimental results show that the die pressure has little effect on output, which is significantly different from that of single screw extruders. Oscillation pressure was introduced into the extrusion process by the dynamic convergent-divergent flow channel of the vane extruder. The oscillation frequency of melt pressure is four times of that of the rotor angular frequency. The die pressure has a little influence on the oscillation amplitude of melt pressure. The oscillation amplitude of melt pressure increases with the increase of rotor speed. The oscillation amplitude of melt pressure decreases along the extrusion direction. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2016, , 21545; View this article online at wileyonlinelibrary.com.

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Morphology study of immiscible polymer blends in a vane extruder

Cited by 51 publications

References 35 publications

Total Strain of Newtonian Fluids in a Vane Extruder

Total Strain of Newtonian Fluids in a Vane Extruder

Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior

Experimental Study of the Extrusion Characteristic of a Vane Extruder Based on Extensional Flow

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