A study on polymer blending microrheology

Elmendorp, J. J.

doi:10.1002/pen.760260608

Cited by 228 publications

(143 citation statements)

References 11 publications

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“…This is in agreement with the recent findings of Liu [3] on co-continuous PA/ABS blends filled with nanosilica. These experiments also confirms the work of Elmendorp [10] who has found that the appearance of yield stress prevents grow of capillary instabilities which can be directly related to the coarsening rate. The effects described above can be found qualitatively in the (PS/CB)/PMMA blends, too (Fig.…”

Section: -4supporting

confidence: 78%

Structure development in co-continuous polymer blends filled with carbon black during annealing

Starý¹

2016

AIP Conference Proceedings

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Abstract. Heterogeneous polymer blends filled with conductive filler often show preferential distribution of the filler particles in one of the blends components or at the interface. This phenomenon leads to the lower percolation threshold in comparison with single matrix composites or systems with random filler distribution. In this contribution the rheological and electrical properties of polystyrene/polymethylmethacrylate blends with co-continuous structure and containing different amount of carbon black are discussed. Furthermore, the coarsening of the phase structure during annealing under quiescent conditions in the molten state is evaluated by image analysis of SEM micrographs. It follows from the experiments performed, that the coarsening of the phase structure is suppressed by the appearance of flow restrictions induced by build-up of carbon black particle structures.

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Section: -4supporting

confidence: 78%

Structure development in co-continuous polymer blends filled with carbon black during annealing

Starý¹

2016

AIP Conference Proceedings

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“…The factor ffiffi 2 3 q originates from equaling the amplitude to the mean thread radius, which would give a neck radius of 0. 50 This estimate for the critical capillary number is likely to underestimate the true value, since the breakup of the thread is unavoidable even if the neck radius is not completely zero yet, and the growth rate of the distortion actually increases as the neck gets thinner.…”

Section: -12mentioning

confidence: 97%

Stability and breakup of confined threads

2012

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A boundary-integral method for periodic arrays of drops, threads or sheets between parallel walls is presented. The Green's functions take the form of a far-field HeleShaw description, which is used to generate periodic Green's functions for the parallel-wall configuration. The method is applied to study the effect of confinement on the breakup of threads. A comparison is made with classical Tomotika's theory and growth rates parallel and perpendicular to the walls are determined as a function of confinement ratio. Contrary to existing belief, we find that confined threads are not stable, but that the time for breakup increases with confinement and viscosity ratio, at least for threads whose diameter is smaller than the wallspacing. We also show the in-phase and out-of-phase breakup for an array of threads, as well as the stabilizing effect of shear flow.

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“…Calculations have been performed, using for the interfacial tension a value of (T= 5~ lop3 N/m [Wu (1979), Elmendorp (1986)]. This interfacial tension can be decreased via the addition of compatibilizers to the blend.…”

Section: Thread Break-upmentioning

confidence: 99%

“…The morphology continuously adapts to changes in shear and elongational stress, deformation rate, total strain, processing time, and temperature [see e.g., Utracki (1989), Han (1981), Paul and Newman (1978), Paul and Barlow (1980), Meijer et al. (1988), and especially the references in Elmendorp (1986) and Elemans ( 1989)]. In order to obtain the desired properties in the final product, it is important to control the morphology during the different processing steps involved.…”

Section: Introductionmentioning

confidence: 99%

Influence of electron beam irradiation on the microrheology of incompatible polymer blends: Thread break‐up and coalescence

Gisbergen¹,

Meijer²

1991

Journal of Rheology

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SynopsisThe microrheology of polymer blends as influenced by crosslinks induced in the dispersed phase via electron beam irradiation, is systematically investigated for the model system polystyrene/low density polyethylene (PWLDPE).Both break-up of threads and coalescence of particles are delayed to a large extent, but are not inhibited completely and occur faster than would be expected for a nonirradiated material with a comparable viscosity. Small amplitude, dynamic rheological measurements indicated that in the irradiated materials a yield stress could exist. In contrast, direct microrheological measurements showed that this yield stress, which would prevent both break-up and coalescence, could not be realized by EB irradiation. Apparently, the direct study of the microrheology of a blend system is important for the prediction of the development of its morphology and it is not possible to rely only on rheological data obtained via other methods.

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A study on polymer blending microrheology

Cited by 228 publications

References 11 publications

Structure development in co-continuous polymer blends filled with carbon black during annealing

Structure development in co-continuous polymer blends filled with carbon black during annealing

Stability and breakup of confined threads

Influence of electron beam irradiation on the microrheology of incompatible polymer blends: Thread break‐up and coalescence

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