gelation time


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gelation time

[jə′lā·shən ‚tīm]
(chemical engineering)
In the manufacture of a thermosetting resin, the time interval between the addition of the catalyst into a liquid adhesive system and the formation of a gel.
References in periodicals archive ?
2] In series B, where the pigments contain zinc either as the oxide or in the form of ions, an increase in the silica/alumina ratio leads to a decrease in the gelation time.
5 Gelation time Resin or at 100 [degrees]C Specific resole (h:min:s) gravity 5% Catalyst PF1 >10:0:0 1.
In this study, the rheometry results showed that trend of the change in gelation times lower temperature sensitivity above the gelation temperature.
1-4 show further that the nonlinearity in the curve depicting the dependence of gelation time as a function of the photoinitiator loading concentration increases as the functionality of the monomers increases for the experimental data.
There will be no significant differences observed for the powder with and without alcohol medium excluding the pH and gelation time.
The results showed that the thiol amounts have slight effects on the morphology of fibers when the gelation time is less than dispersive time.
Varley reported gelation time varying with temperature from 358 min at 110 [degrees] C to 18 min at 180 [degrees] C.
Heating would shorten the gelation time by increasing the polymerization rate constants.
In this study, we also found that gelation time was shortened by increasing the crosslinker concentration.
57 that represents the instance of gelation, whereas at a lower temperature of 180 [degree] C the gelation time is considerably longer, around 6 min and at 220 [degree] C it takes only a few seconds to reach the gel point.
This sudden and irreversible transformation from a viscous liquid into an elastic gel is defined as the gelation point, and the time at which it occurs, at a given isothermal cure temperature, is the gelation time.
The gelation time of resins was determined on a standard hot-plate with a temperature controller.