scholarly journals Thermoplastic Polyurethanes-Fumed Silica Composites: Influence of NCO/OH in the Study of Thermal and Rheological Properties and Morphological Characteristics

10.5772/35162 ◽  
2012 ◽  
Author(s):  
Jos Vega-Baudrit ◽  
Sergio Madrigal ◽  
Jos Miguel Martn Martnez
Keyword(s):  
Rheological Properties ◽  
Fumed Silica ◽  
Morphological Characteristics ◽  
Thermoplastic Polyurethanes

scholarly journals Transferred Arc Production of Fumed Silica: Rheological Properties

2008 ◽  
Vol 47 (17) ◽  
pp. 6790-6795 ◽  
Author(s):  
Ramona Pristavita ◽  
Richard J. Munz ◽  
Tony Addona
Keyword(s):  
Rheological Properties ◽  
Fumed Silica ◽  
Transferred Arc

Influence of the Parameters of Formulation on the Fresh Properties of Cementing Materials with Admixtures

2012 ◽  
Vol 730-732 ◽  
pp. 456-461 ◽  
Author(s):  
Abdelaziz Boudchicha ◽  
Mustapha Cheikh Zouaoui ◽  
Jean Louis Gallias
Keyword(s):  
Rheological Properties ◽  
Morphological Characteristics ◽  
Experimental Methodology ◽  
Mineral Admixtures ◽  
Fresh Properties ◽  
Absolute Volume ◽  
Solid Phases ◽  
The Absolute ◽  
Volume Substitution

The use of mineral admixtures in cementing materials can generate significant modifications in the fresh and hardened mixes, which can depend on the parameters of formulation. To study the influence of the parameters of formulation on the rheological properties of cementing materials with admixtures, we used seven admixtures different by their mineralogical natures, their fineness, and their morphological characteristics, two types of cements and two types of superplasticizers. The experimental methodology used is based on the volume substitution of the cement by admixtures in mixtures whose the absolute volume of the solid phases and workability are preserved constant. The main results achieved showed that the rheological properties of the fresh mortars with admixtures are very influenced by the amount and the properties of admixtures, and the nature of the superplasticizer, but depended rather on the nature of the cement used.

Injectable silica–permanganate gel as a slow-release MnO4− source for groundwater remediation: rheological properties and release dynamics

2016 ◽  
Vol 18 (2) ◽  
pp. 256-264 ◽  
Author(s):  
S. Yang ◽  
M. Oostrom ◽  
M. J. Truex ◽  
G. Li ◽  
L. Zhong
Keyword(s):  
Rheological Properties ◽  
Pore Water ◽  
Fumed Silica ◽  
Groundwater Remediation ◽  
Slow Release ◽  
Chlorinated Contaminants

A mixture of aqueous KMnO4 solution and fumed silica powders produces a gel that slowly releases a MnO4− oxidant which enhances the removal of chlorinated contaminants from pore water in aquifers.

scholarly journals Rheological properties of aquaeous dispersion of styrene acrylate copolymer incorporating hollow microspheres and AEROSIL®

2018 ◽  
Vol 230 ◽  
pp. 03017 ◽  
Author(s):  
Natalia Saienko ◽  
Dmitriy Demidov ◽  
Yuri Popov ◽  
Roman Bikov ◽  
Vyacheslav Butskyi
Keyword(s):  
Rheological Properties ◽  
Fumed Silica ◽  
Structural Strength ◽  
Aqueous Dispersion ◽  
Hollow Microspheres ◽  
Rotational Viscometer ◽  
Positive Effects ◽  
Acrylate Copolymer ◽  
Degree Of Filling ◽  
High Range

The rheological properties of aquaeous dispersion of styrene acrylate copolymer incorporating hollow aluminosilicate microspheres and AEROSIL® 300 fumed silica (a high-range water reducing admixture) have been investigated using rotational viscometer. It is established that an increase in the degree of filling with hollow microspheres results in a significant increase in the viscosity of aqueous dispersion leading to the technological difficulties when coating the protected surfaces. AEROSIL® 300 can be dosed in small amounts resulting in a decrease in the structural strength and optimal viscosity of aqueous dispersion of acrylate copolymer, which allows to significantly reduce the viscosity density, while maintaining relatively low water demand and characteristics of highly filled systems, which is crucial in the technology of their application. The combination of such fillers as AEROSIL® 300 and hollow aluminosilicate microspheres in the styrene acrylate copolymer aqueous dispersion allows the combination of a number of positive effects: a reduction in the viscosity of the material during application (without dilution) by applying high shear rate and increasing viscosity (structuring) after application, and also during their storage and transportation.

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