Rheology–morphology relationships in nylon–LCP hybrid composites

Pisharath, Sreekumar; Hu, Xiao; Wong, Shing Chung Josh

doi:10.1016/j.compscitech.2006.02.018

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…(a) reducing the viscosity ratio by thickening the matrix 19,36 (b) suppressing the coalescence during mixing 27,37 (c) compatibilization by concentrating at the interface 16,[37][38][39] Note that the mechanisms (b) and (c) are not completely independent, because besides the hindrance of coalescence by solid aggregates, the presence of compatibilizer at the interface also results in suppression of coalescence. 12 Nanosilica is especially known as a thickening agent in the emulsion and suspension systems.…”

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Rheology and morphology of nanosilica‐containing polypropylene and polypropylene/liquid crystalline polymer blend

Foudazi

Nazockdast

2012

J of Applied Polymer Sci

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We studied the rheology and morphology of hydrophilic and hydrophobic silica containing polypropylene (PP) and PP/liquid crystalline polymer (LCP) blend. It was found that hydrophilic silica has higher tendency for aggregation and forms bigger aggregate size. The lower percolation threshold and the higher fractal dimension for hydrophilic silica are due to its stronger particle–particle interaction compared with the hydrophobic one. Although the hydrophobic silica has lower thickening capability and lower coalescence hindrance by aggregates, its presence at the interface of PP/LCP blend results in smaller droplet size and higher elasticity of hybrid samples in comparison to hydrophilic silica. These results confirm that the hydrophobic silica has a compatibilization capability for PP/LCP blend, whereas the hydrophilic silica mostly works as a thickening agent and suppresses the coalescence. We suggested that for comparison of different particulate compatibilizers, the elasticity of filled blend sample against filled matrix phase can be used in high and low frequency ranges. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Rheology and morphology of nanosilica‐containing polypropylene and polypropylene/liquid crystalline polymer blend

Foudazi

Nazockdast

2012

J of Applied Polymer Sci

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“…In order to achieve the optimum condition in industrial processing and to obtain products with better properties, it is necessary to characterize the melt rheology. Polyamide 6 and polyamide 6,6 blends and composites have widely been investigated for their rheological properties (for example, see references ). Researchers have also characterized the glass transition, crystallization, and microstructure of polyamide 11 and polyamide 12 blends .…”

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Rheological characterization of filled polyamide 11 and polyamide 12 solutions in polyols

Patankar

Ginzburg

Billovits

2019

J of Applied Polymer Sci

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A thorough understanding of the rheological properties of real-world, formulated polymer melts and solutions is important to fabricate articles via typical melt processing techniques. Polyamides have been studied extensively in the area of water purification applications. In this work, the viscosity of these homogeneous polyamide 11 and polyamide 12 solutions in specific polyols was measured in the single phase region as a function of shear rate and temperature via capillary rheometry. In addition, the viscosity of the same polyamide solutions containing various levels of dispersed, nanoscale calcium carbonate particles was characterized in order to understand the rheology of the filled systems. Viscosity-reduced shear rate master curves were constructed by applying the principle of time-temperature superposition, and the activation energies were measured for the polyamide-polyol solutions. The observed increase in viscosity caused by the addition of nanofiller could not be explained by simply applying a vertical shift to the master curve, and a density exponent was required to account for the stiffening mechanism. Also, the dependence of the relative viscosity on the filler loading was shown to be consistent with the hypothesis that the filler particles were organized in the form of small fractal aggregates. The filled polyamide 11 systems exhibited higher relative viscosities than the filled polyamide 12 systems, indicating a higher level of particle aggregation and larger mean cluster size for the filled polyamide 11 systems.Additional Supporting Information may be found in the online version of this article.™Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow.

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“…Wei Yu et al [4] found LCP as dispersed phase in the immiscible blends showed different dynamic rheological properties, and established a new model was presented to describe the dynamic rheology. Sreekumar Pisharath et al [5] used capillary rheometry studied rheology and morphology relationships in nylon/LCP composites. Yanfen Ding et al [6] found that the viscosity of ternary Nylon 6/glass bead (GB)/LCP hybrid blends was lower than that of neat Nylon 6, LCP, binary Nylon 6/LCP and Nylon 6/GB blends.…”

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confidence: 99%

The Rheological Behavior of Polyamide-66/Liquid Crystal Polymer Blends

Pan

Sun

et al. 2013

AMR

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The rheological behavior of polyamide-66 (PA66)/liquid crystal polymer (LCP) blends and the effect of liquid crystal polymer on melt flow rate were studied. A torque rheometer was used to investigate the rheological behavior of the PA66/LCP blends, and the effects of mass fraction of LCP, compatibilizer (PS-g-MAH), blending temperature and rotor speed on the rheological behavior of the blends were analyzed by an orthogonal experiment method. The results showed the above factors’ effects on the equilibrium torque of the blends were different individually, and the rheological behavior of the blend strongly depended on the LCP content. The melt flow rate was enhanced by a small content of LCP, and decreased with increasing LCP content.

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Rheology–morphology relationships in nylon–LCP hybrid composites

Cited by 12 publications

References 19 publications

Rheology and morphology of nanosilica‐containing polypropylene and polypropylene/liquid crystalline polymer blend

Rheology and morphology of nanosilica‐containing polypropylene and polypropylene/liquid crystalline polymer blend

Rheological characterization of filled polyamide 11 and polyamide 12 solutions in polyols

The Rheological Behavior of Polyamide-66/Liquid Crystal Polymer Blends

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