The Rheology of Polymer Alloys and Blends

Utracki, L. A.; Kamal, Musa R.

doi:10.1007/0-306-48244-4_7

Cited by 163 publications

(243 citation statements)

References 379 publications

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“…The attention is drawn to the solidlike behavior at small deformation rates, claiming that the nonterminal flow region is the most important PNC characteristic. However, such behavior has been observed in all MPSs having a percolated three-dimensional network i.e., in suspensions, ionomers, polymer alloys (e.g., compatibilized, low concentration blends [Utracki and Kamal, 2002]), composites, and foams [Utracki, 1988[Utracki, , 1995[Utracki, , 2004Krishnamoorti and Yurekli, 2001;Solomon et al, 2001]. Thus, such behavior is not unique for PNCs, but related to the presence of three-dimensional structures.…”

Section: Melt Rheologymentioning

confidence: 99%

“…Since the nature minimizes the expenditure of energy, during MPS flow the less viscous phase migrates to the high-stress areas, hence toward the wall [Utracki and Kamal, 2002]. During the flow of suspensions through tubes the solid particles migrate away from the wall, either to the tube axis, or to an annulus midway between the tube wall and the axis [Whitmore, 1962].…”

Section: Steady-state Shear Flowmentioning

confidence: 99%

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Rheology of Polymers with Nanofillers

2010

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Section: Melt Rheologymentioning

confidence: 99%

Section: Steady-state Shear Flowmentioning

confidence: 99%

Rheology of Polymers with Nanofillers

2010

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“…There are many studies on structure [1][2][3][4][5] and structurerheology relationships 1,2,4) for bicontinuous structure of polymer blends. However, most of these studies treat the bicontinuous structure at the quiescent state (without flow or stress).…”

Section: )mentioning

confidence: 99%

“…[1][2][3][4][5] The average size and sizedistribution of dispersed phases after steady flow have been studied in detail, and then the average size can be predicted and controlled. It has been shown by our series of studies on droplet deformation [6][7][8][9][10][11] and stress [7][8][9][10][11][12][13] after application of step shear strains that the shear stress due to the interface in polymer blends with the droplet/matrix structure can be predicted rather well based on the Doi-Ohta theory 14) from observed shapes and dimensions of the deformed droplets.…”

Section: Introductionmentioning

confidence: 99%

Creep Behavior of a Polymer Blend Melt and 3D Observation of the Deformed Bicontinuous Structure by a High-contrast X-ray CT

Takahashi

Hatakeyama

Nishikawa

2016

J. Soc. Rheol., Jpn

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Dynamic viscoelastic, creep and steady shear flow measurements are made on a polymer blend melt with a phaseseparated bicontinuous structure. 3D structures at quiescent, constant-stress and constant-shear-rate states are observed by a high-contrast X-ray computerized tomography (CT) after quick quenching of each sample. At the quiescent state, the frequency dependence of the storage modulus at 200 o C shows a power law behavior with the exponent of 0.84. In the shear rate range (at the small shear stress s = 100 Pa) where partial relaxation of the interface of the blend is possible, a peculiar plate-like pattern in the deformed bicontinuous network is observed in the through view of the X-ray CT image. At higher shear rates (at the higher shear stress s = 1000 Pa) where the interface relaxation is suppressed, another peculiar short plate-like pattern appears in the edge view. When the shear rate in the steady shear flow is equal to the average shear rate in the creep test, a very similar deformed pattern of the interface is observed.At the macroscopic shear strain of 3.2 in the creep test at 100 Pa, the observed strain of the deformed bicontinuous network has a distribution and the majority are much smaller than the strain expected from the affine deformation assumption. An average orientation angle of the deformed network at the shear strain of 3.2 corresponds to the angle given by the affine deformation of the shear strain 1.35.

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“…Unfortunately, in most cases, homopolymers are normally immiscible and the blends of them will separate into macroscopic domains because of the small mixing entropy [2,3]. Incompatible blends with these macroscopic phase-separated regions often exhibit poor mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

External potential dynamics simulation of the compatibility of T-shaped graft copolymer compatibilizing two immiscible homopolymers

Li¹,

Jiang²

2010

E-Polymers

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Abstract:The compatibilizing effect of T-shaped graft copolymers between two incompatible homopolymers A and B was studied by using the external potential dynamics (EPD) method based on dynamic self-consistent field theory. We specifically focus on the role of the concentration and the junction position of the graft copolymer on the compatibility. The blend containing compatibilizers exhibits slow dynamics during the phase separation. We observed that the compatiblizers are particularly efficient when the graft point is close to the free end of the backbone chain.

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The Rheology of Polymer Alloys and Blends

Cited by 163 publications

References 379 publications

Rheology of Polymers with Nanofillers

Rheology of Polymers with Nanofillers

Creep Behavior of a Polymer Blend Melt and 3D Observation of the Deformed Bicontinuous Structure by a High-contrast X-ray CT

External potential dynamics simulation of the compatibility of T-shaped graft copolymer compatibilizing two immiscible homopolymers

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