Results 261 to 270 of about 253,222 (306)

Gel strength and rate of gelation of soft polymers

Dental Materials, 1991
A rheometer was used to characterize the gelation rate of six commercial short- to medium-term (chairside intra-oral gelation) denture soft-lining materials. Shear puncture force was measured from one to 60 days for six short- to medium-term materials as well as for three heat-cured (polymerizable) materials.
D W, Jones, E J, Sutow, B S, Graham
openaire   +2 more sources

Characterization of Crosslinked Gel Kinetics and Gel Strength Using NMR

Proceedings of SPE International Symposium and Exhibition on Formation Damage Control, 2004
Abstract Highly crosslinked gels are used in high-permeability reservoirs to achieve good fluid-loss control during well completion and workover operations. Crosslinked gels are also commonly used for shutting off unwanted gas and/or water influx into production wells, and for improving the conformance of the near wellbore injection ...
Laura Romero-Zeron, F. Manalo, A. Kantzas   +2 more
openaire   +1 more source

Gel strength of Ca-limited alginate gels made in situ

Hydrobiologia, 1993
The gel strengths of Ca-alginate gels made in situ with different degree of cross-linking were determined by adapting three different methods: FIRA Jelly Tester, initial deformation (Youngs modulus, E) with a Stevens LFRA Texture Analyzer, and dynamic measurements with a Bohlin VOR Rheometer (dynamic storage modulus, G’).
K. I. Draget, M. K. Simensen, E. Onsøyen, O. Smidsrød   +3 more
openaire   +1 more source

Characterization of Crosslinked Gel Kinetics and Gel Strength by Use of NMR

SPE Reservoir Evaluation & Engineering, 2008
Summary Highly crosslinked gels are used in high-permeability reservoirs to achieve appropriate fluid-loss control during well completion and workover operations. Crosslinked gels are also used to shut off unwanted gas and/or water influx into production wells and to improve the conformance of the near-wellbore injection profile in ...
L. Romero-Zerón, F. Manalo, A. Kantzas
openaire   +1 more source

Electrophoresis and Gel Strength

Nature, 1954
A CURIOUS phenomenon has been noted in recent work on the electrophoresis of sodium carrageenate. This polysaccharide occurs in the red seaweed, Chondrus crispus, and is composed mainly of d-galactose sulphate units linked in the 1–3 positions. Cations associated with the sulphate can become ionized to make the molecule a polyelectrolyte.
openaire   +2 more sources

Elasticity, tear strength, and strength of adhesion of soft PVC gels

Journal of Applied Polymer Science, 1986
AbstractAn experimental study is described of the tensile modulus E of elasticity, tear strength Gc, and strength Ga of adhesion to a Mylar substrate, for PVC gels prepared with a wide range of PVC concentrations and with four different plasticizers. The modulus E, measured under quasiequilibrium conditions, was found to be approximately proportional ...
A. N. Gent, N. Shimizu
openaire   +1 more source

Dielectric strength measurements of silicone gel

2016 Progress in Applied Electrical Engineering (PAEE), 2016
Silicone gels are gaining popularity as insulating materials in electrical applications, owing among others, to their good thermal stability, high elasticity, easy processing and good dielectric properties. In this paper results of dielectric strength measurements performed for a commercially available insulating RTV-2 silicone gel are discussed.
Jedrzej Banaszczyk, Bartlomiej Adamczyk
openaire   +1 more source

Mechanical strength of participate silica gels

Journal of Materials Science, 1991
The wet and dry strengths of particulate (colloidal) silica gels have been studied. It is shown that these strengths are a function of particle size of the powders composing the sol, and the higher the surface area of the powders, the higher the strength values of the gels. Ageing the wet gels in moulds has no effect upon strength.
E. M. Rabinovich, C. R. Kurkjian, N. A. Kopylov, D. A. Fleming   +3 more
openaire   +1 more source

Bulk Gel Strength Tester

Proceedings of SPE Oilfield and Geothermal Chemistry Symposium, 1985
ABSTRACT A simple screen extrusion rheometer (Gel Strength Tester) was designed to quantitatively compare strong bulk gels of the compositions used for conformance improvement in near-wellbore treatments. In addition, this tester should be able to measure other strong gels, such as thick drilling muds.
openaire   +1 more source

Parametric study of strength of silica gels

Journal of Non-Crystalline Solids, 1994
Abstract Cylindrical gel bodies were produced by using Si(OC2H5)4, C2H5OH and H2O with various catalysts. A systematic parametric study of gel strength and microstructure as a function of C2H5OH/H2O molar ratio and catalyst concentration in sol, catalyst type as well as aging time, was conducted.
Fikret Kirkbir, Hideaki Murata, Douglas Meyers, S. Ray Chaudhuri, Arnab Sarkar   +4 more
openaire   +1 more source