In polymer chemistry, the gel point is an abrupt change in the viscosity of a solution containing polymerizable components. At the gel point, a solution undergoes gelation , as reflected in a loss in fluidity.

The gel point is a critical point at which the first infinitesimal amount of gel of infinite (i.e. limited only by the macroscopic sample size) molecular weight. Below the gel point, G' is lower and falls faster with decreasing frequency than G” in the flow region.

The onset of gelation, or gel point, is accompanied by a sudden increase in viscosity. [3] This "infinite" sized polymer is called the gel or network, which does not dissolve in the solvent, but can swell in it.

The gel point (GP) marks the transition of an amorphous material from liquid to solid due to gelation. The transition is caused by the growth of connected struc-ture in the material, a structure that correlates molecular or supramolecular mo-tion over large distances.

This study aims to investigate how the complex viscosity of the resin varies with temperature. The best method for identifying the gel point will be attempted, and after that, we will try to comprehend the state of the matter and how polymerization works.

The gel point in a curing system can be used to monitor the progression of the curing reaction and to determine the kinetics of the gelation. The gel point can be determined via rheological methods so we can use a rheometer to measure the gelation kinetics. We use an epoxy system, measured on a Discovery Hybrid Rheometer, as an example in this ...

May 12, 2014 · The gel point may be calculated if the chemistry is known (1,2). Gelation in condensation systems like epoxy-amine typically occurs between 50 and 80% conversion ( a = 0.5 – 0.8). For high functionality and free-radical initiated systems, gelation will typically occur at lower conversions.

Feb 15, 2016 · The gel point (GP) marks the instant at which a material passes from liquid to solid due to gelation. A material at its GP, commonly called critical gel, is in a critical state with unique physical and chemical properties.

GEL POINT Introduction The gel point (GP) marks the transition of a material from liquid to solid. The transition is caused by the growth of structure in the material, a structure that correlates molecular or supramolecular motion over large distances. At GP, the correlation length diverges to infinite size. This appearance of long-range connec-

Dec 20, 2020 · The gel point is an abrupt change in the viscosity of a solution containing a polymer. At the gel point, a solution undergoes gelation, leading to a gel formation, as reflected in a loss in fluidity and the formation of a 3D network.