Study on the interfacial tension of immiscible polystyrene/polypropylene blend with deformed drop retraction method

Dan, Pan; He, Houkang; Ren, He; Xu, Hao; Wang, Shuai; Chen, Long; Qin, Zongyi

doi:10.1177/0892705717751018

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…The relaxation time is proportional to the ratio of viscous forces working to deform the droplet geometry in dispersing flows and the interfacial tension working to restore the droplet to its original shape, as expressed by the capillary number Ca = γ is the shear rate, and Γ 12 is the interfacial tension [21]. The interfacial tension for PS/PP blends was studied as a function of the molecular weight of PS and a single PP grade, and it increases with an increasing molecular weight of PS, while it levels off at large values [22]. The morphology of polymer blends and critical composition for co-continuity were mainly studied through control of interfacial tension by changing the composition and viscosity of the PS matrix [23].…”

Section: Introductionmentioning

confidence: 99%

Morphology, Rheology and Crystallization in Relation to the Viscosity Ratio of Polystyrene/Polypropylene Polymer Blends

et al. 2020

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Microfibrillar and droplet morphology of polypropylene (PP) phase dispersed in polypropylene (PS) was fabricated by using melt-extrusion. This morphology was obtained by introducing isotactic PP (20 wt.%) with different viscosity in the PS matrix (80 wt.%). Furthermore, the rheological properties of the blend investigated as a function of the viscosity ratio K. The variations in blend morphology were related to crystallization, melting properties, and viscoelasticity. The blends with K >> 1 develop a fine morphology with PP microfibrils along the flow direction, while diameters of the dispersed PP droplets gradually increase with lower values of K = 1, or K << 1. Crystallinity of the prepared blends significantly decreases compared to neat PP, while the microfibrillar morphology induces homogeneous crystallization with small crystallites. This is reflected in a decrease of the crystallization temperature, small loss in the crystallinity, and lower melting temperature of the PS80/PP20 blend compared to neat PP. The storage moduli, loss moduli, and complex viscosity are highest for the microfibrillar morphology that presents retarded relaxation. The rheological properties are dominated by the dispersed phase (K > 1), or matrix (K < 1). The variation in blend properties with microfibrillar morphology can be clearly distinguished from heterogeneous blends containing PP droplets, providing an efficient tool to create a binary blend with unique properties.

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Section: Introductionmentioning

confidence: 99%

Morphology, Rheology and Crystallization in Relation to the Viscosity Ratio of Polystyrene/Polypropylene Polymer Blends

et al. 2020

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“…56,57 Consequently, magnetic nanoparticles have also been used for enhancement of microwave penetration and absorption by polymer/graphene nanocomposite. 58 Yan et al 59 prepared PS/graphene nanocomposite with a specific shielding effectiveness of 64.4 dB cm 3 g −1 . EMI shielding materials had lightweight and low thickness of 2.5 mm.…”

Section: Application Areasmentioning

confidence: 99%

“…1 PS has fine thermal stability and high glass transition temperature (T g ) approximately 100 C. PS has been blended with other polymers and nanomaterials to offer mechanical and toughness properties. 2,3 Graphene is a nanoallotropic form of carbon. It has two-dimensional atomic-scale hexagonal lattice structure.…”

Section: Introductionmentioning

confidence: 99%

Technical viewpoint on polystyrene/graphene nanocomposite

Kausar

2020

Journal of Thermoplastic Composite Materials

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This review presents state-of-the-art progress in the field of polystyrene (PS)/graphene nanocomposite. Graphene is a monoatomic thick nanoallotrope of carbon. It has attracted tremendous research consideration owing to chemical functionalization aptitude and remarkable physical properties. Graphene has been used as a potential nanofiller to dramatically improve the performance of polymeric nanocomposite. PS is an important synthetic aromatic thermoplastic polymer. Graphene has been used to enhance the mechanical strength, thermal stability, electrical conductivity, and thermal conductivity of PS/graphene nanocomposite. Dispersion routes and synthetic methods of graphene and PS/graphene nanocomposite have also been reviewed. PS/graphene nanocomposites have been explored for anticorrosion, electromagnetic interference shielding, batteries, electrocatalysis, and microextraction applications. In spite of interesting developments, a lot remains to be done with regard to fundamental understanding of structure–property relationship and designing materials to operate for advanced high performance applications. This review is also concluded listing current challenges associated with processing and future perspectives of nanocomposite.

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“…Although they are applicable for both purely viscous and viscoelastic fluids with very good accuracy, it requires the matrix transparency, comparatively low viscosity of the polymer, and long time to reach equilibrium, with increased risk of thermal degeneration of the polymers. On the contrary, the dynamic methods, including the breaking thread method [23][24][25], imbedded fiber method [26][27][28][29], and deformed drop retraction method [30][31][32][33][34], obtain the interfacial through the morphology evolution equation. For example, the deformed drop retraction method establishes an equation that describes the shape variation of a deformed drop during retraction.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Effect of Viscoelasticity on Drop Retraction and the Evaluation of Interfacial Tension between Polymer Melts

Deng

Zhang

Jiang

et al. 2020

Advances in Polymer Technology

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The purpose of this paper is twofold. The first is to numerically investigate and reveal the effect of polymer viscoelasticity on the retraction of a deformed drop using the lattice Boltzmann (LB) method and polymer kinetic theory. More importantly, the second is to propose a novel method to evaluate the interfacial tension between polymer melts based on the numerical study. Compared with the conventional deformed drop retraction method (DDRM), the present method is designed to greatly reduce the impact of polymer viscoelasticity on measuring interfacial tension. To verify, the interfacial tension between molten PP and POE is evaluated using the proposed method and obviously closer result to the true value is shown.

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Study on the interfacial tension of immiscible polystyrene/polypropylene blend with deformed drop retraction method

Cited by 4 publications

References 23 publications

Morphology, Rheology and Crystallization in Relation to the Viscosity Ratio of Polystyrene/Polypropylene Polymer Blends

Morphology, Rheology and Crystallization in Relation to the Viscosity Ratio of Polystyrene/Polypropylene Polymer Blends

Technical viewpoint on polystyrene/graphene nanocomposite

Numerical Investigation of the Effect of Viscoelasticity on Drop Retraction and the Evaluation of Interfacial Tension between Polymer Melts

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