The development of phase morphology and polymer chain orientation in the processing of incompatible polymer blends

White, James L.; Min, Kyonsuku

doi:10.1002/adv.1985.060050401

Cited by 37 publications

(16 citation statements)

References 59 publications

(6 reference statements)

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“…'-3 Generally, the major component forms the continuous phase. 4 When the volume fraction of the dispersed phase is increased, the average particle size increases as well. In addition to the composition, the phase-inversion point also depends on the viscosity of the components under the conditions of blending.…”

Section: Introductionmentioning

confidence: 97%

The phase inversion and morphology of nylon 1010/polypropylene blends

Zhang

Yin

1996

J. Appl. Polym. Sci.

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SYNOPSISNoncompatibilized and compatibilized blends of nylon 101O/PP blends having five different viscosity ratios were prepared by melt extrusion. Glycidyl methacrylate-grufted-polypropylene (PP-g-GMA) was used as the compatibilizer to enbance the adhesion between the two polymers and to stabilize the blend morphology. The effect of the viscosity ratio on the morphology of nylon 1010/polypropylene blends was investigated, with primary attention to the phase-inversion behavior and the average particle size of the dispersed phase. The relationship between the mechanical properties and the phase-inversion composition was investigated as well. Investigation of the morphology of the blends by microscopy indicated that the smaller the viscosity ratio (qpp/qpA) the smaller was the polypropylene concentration at which the phase inversion took place and polypropylene became the continuous phase. The compatibilizer induced a sharp reduction of particle size, but did not have a major effect on the phase-inversion point. An improvement in the mechanical properties was found when nylon 1010 provided the matrix phase.

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Section: Introductionmentioning

confidence: 97%

The phase inversion and morphology of nylon 1010/polypropylene blends

Zhang

Yin

1996

J. Appl. Polym. Sci.

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“…This morphology may be due to the lower viscosity of the PC compared to that of the TLCP at the lower barrel temperature. As reported by Min and White [12,13], the dispersed phase droplets will elongate by shear stresses when the viscosity of the dispersed phase is lower than that of the continuous phase (η d /η m < 1). In the opposite case, when the viscosity of the dispersed phase is higher than that of the continuous phase, it is difficult to deform the suspended droplets, except by very high stresses.…”

Section: Effect Of Processing Temperature On Morphological Characterimentioning

confidence: 76%

Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend

Wang

Hinrichsen

1997

International Polymer Processing

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The influence of processing temperature on the morphological and mechanical properties of polycarbonate (PC) blended with a thermotropic liquid crystalline polymer (TLCP) has been studied. At a barrel temperature of 310°C, the TLCP of the blends exhibits the high orientation level and fiber alignment which correspond to maximum tensile strength. This indicates that the processing temperature might result in the change of the viscosity ratios of the dispersed and continuous phase and is one of the main processing parameters. Date

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“…13,18,23,25,29,38 -42 In addition, it has been shown that commercially useful multiphase blends may exhibit significant dispersed phase particle coalescence 6,7,24,26,27,29,[43][44][45] during some flow or quiescent conditions that exist in melt fabrication processes. Tokita has equated the rate of coalescence, as developed by von Smoluchowski for colloidal systems, 46,47 to an expression for the rate of drop break-up during processing to obtain an equation for the equilibrium particle size, d, in polymer blends.…”

Section: Morphology Stabilitymentioning

confidence: 98%

Morphology of PC/SAN blends: effect of reactive compatibilization, SAN concentration, processing, and viscosity ratio

Wildes

Keskkula

Paul

1999

J. Polym. Sci. B Polym. Phys.

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This article examines the effects of dispersed phase concentration, processing apparatus, viscosity ratio, and interfacial compatibilization using an SAN–amine compatibilizer on the morphology of blends of bisphenol A–polycarbonate (PC) with styrene–acrylonitrile (SAN) copolymers. For uncompatibilized blends, the dispersed phase particle size increased significantly with SAN concentration, and was found to exhibit a minimum at a viscosity ratio of approximately 0.35 for a fixed concentration of 30% SAN in the blend. Although the morphology of uncompatibilized PC/SAN blends mixed in a Brabender mixer, single‐ and twin‐screw extruders were quite similar, the twin‐screw extruder produced significantly finer morphologies in blends containing SAN–amine. The average particle size for blends compatibilized with the SAN–amine polymer was approximately half that of uncompatibilized blends and was relatively independent of viscosity ratio and dispersed phase composition. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 71–82, 1999

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The development of phase morphology and polymer chain orientation in the processing of incompatible polymer blends

Cited by 37 publications

References 59 publications

The phase inversion and morphology of nylon 1010/polypropylene blends

The phase inversion and morphology of nylon 1010/polypropylene blends

Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend

Morphology of PC/SAN blends: effect of reactive compatibilization, SAN concentration, processing, and viscosity ratio

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