Dispersion quality of magnetic tapes prepared from a waterborne formulation

1994 ◽  
Vol 30 (6) ◽  
pp. 4071-4073 ◽  
Author(s):  
Song Cheng ◽  
Hong Fan ◽  
J.W. Harrell ◽  
A.M. Lane ◽  
D.E. Nikles
Keyword(s):  
Dispersion Quality

scholarly journals Quantifying the dispersion quality of partially aggregated colloidal dispersions by high frequency rheology

Soft Matter ◽  
2017 ◽  
Vol 13 (43) ◽  
pp. 7897-7906 ◽  
Author(s):  
Bram Schroyen ◽  
James W. Swan ◽  
Peter Van Puyvelde ◽  
Jan Vermant
Keyword(s):  
High Frequency ◽  
Colloidal Dispersions ◽  
Frequency Limit ◽  
Hydrodynamic Stress ◽  
High Frequency Limit ◽  
Dispersion Quality

The dispersion quality of colloidal dispersions is quantified by analysing the hydrodynamic stress contributions in the high frequency limit.

Studying dispersion quality of nanoparticles into a bio-based coating

2015 ◽  
Vol 89 ◽  
pp. 246-251 ◽  
Author(s):  
Mojgan Nejad ◽  
Paul Cooper ◽  
Veronic Landry ◽  
Pierre Blanchet ◽  
Ahmed Koubaa
Keyword(s):  
Dispersion Quality

Analysis of Power Requirements and Dispersion Quality in Batch Compounding Using a Dispersion Model for Single Agglomerates

1996 ◽  
Vol 69 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Fabrice Bohin ◽  
Donald L. Feke ◽  
Ica Manas-Zloczower
Keyword(s):  
Carbon Black ◽  
Shear Flow ◽  
Processing Time ◽  
Dispersion Model ◽  
Simple Shear Flow ◽  
Flow Conditions ◽  
Filled Polymers ◽  
Batch Mixers ◽  
Dispersion Quality

Abstract The extent of dispersion and torque requirements vary with processing time during the compounding of filled polymers in batch mixers. Starting with a model for the erosion of single agglomerates under simple shear flow conditions, equations have been developed that enable correlation and prediction of the evolution of both dispersion quality and mixing torque during the course of processing. There was an excellent agreement between the shape of predicted dimensionless torque curves and experimental results for silica-silicone rubber premixes. The model was also found useful in correlating results reported in the literature for the quality of dispersion of carbon black into natural rubber.

Preparation and Evaluation of Nanocomposite LDPE Films Containing Ag and ZnO for Food-Packaging Applications

2010 ◽  
Vol 129-131 ◽  
pp. 1228-1232 ◽  
Author(s):  
Aryou Emamifar ◽  
Mahdi Kadivar ◽  
Mohammad Shahedi ◽  
Sabihe Soleimanian-Zad
Keyword(s):  
Food Packaging ◽  
Strain Analysis ◽  
Elongation At Break ◽  
Melt Compounding ◽  
Nanocomposite Polymer ◽  
Transmission Electron ◽  
Lower Elongation ◽  
Preparation And Evaluation ◽  
Dispersion Quality

Nanocomposite polymer films were produced from composites comprising LDPE /nanosilver and LDPE/nano-ZnO by melt compounding. The mechanical properties of the films prepared were characterized by using stress-strain analysis. Dispersion quality of nanomaterials into the polymer matrix film was monitored using the Transmission Electron Microscopy. The results showed the nanocomposites as possessing lower elongation at break and more antimicrobial activity with the increase of each of nanofillers content.

scholarly journals Processing and Structure of Carbon Nanofiber Paper

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Zhongfu Zhao ◽  
Jihua Gou ◽  
Aurangzeb Khan
Keyword(s):  
Carbon Nanofibers ◽  
Acid Treatment ◽  
Carbon Nanofiber ◽  
Essential Element ◽  
Process Conditions ◽  
Processing Conditions ◽  
Different Types ◽  
Design And Manufacture ◽  
Dispersion Quality

A unique concept of making nanocomposites from carbon nanofiber paper was explored in this study. The essential element of this method was to design and manufacture carbon nanofiber paper with well-controlled and optimized network structure of carbon nanofibers. In this study, carbon nanofiber paper was prepared under various processing conditions, including different types of carbon nanofibers, solvents, dispersants, and acid treatment. The morphologies of carbon nanofibers within the nanofiber paper were characterized with scanning electron microscopy (SEM). In addition, the bulk densities of carbon nanofiber papers were measured. It was found that the densities and network structures of carbon nanofiber paper correlated to the dispersion quality of carbon nanofibers within the paper, which was significantly affected by papermaking process conditions.

The Dispersion of Carbon Black in Rubber Part III. The Effect of Dispersion Quality on the Dynamic Mechanical Properties of Filled Natural Rubber

1992 ◽  
Vol 65 (5) ◽  
pp. 1016-1041 ◽  
Author(s):  
A. Y. Coran ◽  
J-B. Donnet
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Natural Rubber ◽  
Shear Strain ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Short Period ◽  
Dispersion Quality ◽  
Carbon Black Dispersion

Abstract The Part I of this series described a rapid method for determining the quality of carbon-black dispersion. The second paper (Part II) was concerned with the kinetics of the dispersion of carbon black into natural rubber (dispersion quality as a function of mixing time) in an internal mixer. In this paper we consider the effects of changes in dispersion quality on the dynamic mechanical properties of both unvulcanized and vulcanized natural rubber. The effects of changes in the degree of carbon-black dispersion were measured by using a new prototype moving-die rheometer (which is presently being developed at Monsanto Instruments & Equipment Research Laboratory). By using this prototype rheometer, G′ and G″ were measured as functions of shear-strain amplitude, temperature, and frequency. Increases in the degree of carbon-black dispersion in uncured natural rubber (starting from very poor dispersion quality) give decreases in the values of both G′ and G″. The decrease in dynamic moduli with increases in the degree of carbon-black dispersion might be explained on the basis of a network of agglomerates which exists when the quality of dispersion is extremely poor. In the case of uncured samples, values of G′, measured at low strains (e.g. ±1%), become reduced after the imposition of a larger (±50%) sinusoidal shear strain for a short period of time (e.g. 3 s). Then, with the passage of time, the reduced value of G′ partially recovers. The extent of this recovery increases with increases in the dispersion rating DR. Similar results were obtained with respect to the loss modulus G″. In both cases, the extent of recovery is much less when the carbon black is very poorly dispersed. The unrecoverable proportion of G′ or G″ is also considered to be due to a network composed of mutually interactive agglomerates of carbon black.

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