gel

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gel:

see colloidcolloid
[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
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gel

[jel]
(chemistry)
A two-phase colloidal system consisting of a solid and a liquid in more solid form than a sol.

gel

A semisolid material, somewhat elastic, composed of matter in a colloidal state that does not dissolve; remains suspended in a solvent. Also see cement gel.
References in periodicals archive ?
The addition of tannin extract from mangium bark increased phenolic compounds and solid content in PTF resin adhesives, but it decreased pH, gel time, and the viscosity of PTF resin adhesives.
The viscosity, 3-d compressive strength, and gel time of the 16 different group tests were tested based on the scheme of the orthogonal test; the results are listed in Table 3.
Figure 5 intuitively shows the variation trend of the acidic water glass gel time: the gel time decreases rapidly with the decrease of the volume ratio when the 30[degrees] Be water glass and the 5% oxalic acid are selected to mix the grout.
By using different concentrations of PI the gel time can be adjusted without loss of properties.
Gel time at different temperatures for pH value 9.5 to 11.5 and phenol concentrations 1.5% to 2.5% [w/w] Gel start point time in hours at different temperatures Gel composition pH 85[degrees]C 90[degrees]C 105[degrees]C 1.5% phenol 9.5 -- 16 -- 10 -- 28 -- 10.5 -- 32 -- 11 -- 60 -- 2.0% phenol 9.5 18 15 10 10 22 18 15 10.5 38 30 23 11 62 50 45 2.25% pheno 9.5 15 11 10 10 19 14 12 10.5 35 28 23 11 50 45 34 2.5% phenol 9.5 -- 10 -- 10 -- 13 -- 10.5 -- 26 -- 11 -- 44 -- Gel start point time in hours at different temperatures Gel composition pH 115[degrees]C 130[degrees]C 1.5% phenol 9.5 -- -- 10 -- -- 10.5 -- -- 11 -- -- 2.0% phenol 9.5 5 5.25 10 11 5.25 10.5 15 -- 11 15 -- 2.25% pheno 9.5 5 5.25 10 9 4 10.5 11 -- 11 13 -- 2.5% phenol 9.5 -- -- 10 -- -- 10.5 -- -- 11 -- -- Table 3.
An HAA using a combination of the amine adducts described above was tailored to meet the needed gel time and hardness.
Gel time is less than an hour and curing requires 24 hr.
The Arathane adhesive exhibits a 10-minute gel time that is sufficient for part assembly and a fast room temperature cure that increases productivity.
Titleist & Footjoy worldwide has used the VNC in polyurethane research for over a decade to obtain cure profile data on liquid polyurethanes and to determine the gel time of formulations under different processing conditions the effect of catalysts, chain extenders and isocyanate index can also be monitored and displaced on the cure curves.
Viscosity, gel time, solid content, and pH value results of modified and blended PF resins are presented in Table 4.
The rheological profiles (pot-life and gel time) at 23 [degrees]C and 75[degrees]C were determined using a conventional shear stress controlled plate-plate rheometer (MCR 301, Anton Paar) with a plate diameter of 15 mm and a gap distance of 0.25 mm, using rotational mode (pot-life) or oscillatory forces (gel time).
The gel time specifies the time period upto which the adhesive formulation remains in the flowing state, thus, indicates its suitability of application between the substrate.