Gel point determination

TABLE 2-9 Gel Point Determinations for Mixture of 1,2,3-Propanetricarboxylic Acid, Diethylene Glycol, and Either Adipic or Succinic Acid"... 

Scaling Laws and Gel Point Determination a Search for Exponents... 

The crossover of tan 8 curves measured at various angular frequencies constitutes the best criterium for the gel point determination. 

The experimental reports on gel point determinations are scarce. The first reliable experiment was reported by Flory, who carried out this in 1941 in the polyesterification of a pentaerythritol - adipic acid mixture (R- A4+R-B2) (Fig. 17) in order to test his own theory. In 1945, the gelation of the same system was reinvestigated in a more systematic way by Wile [81] he observed that experimen-... 

Gel Point Determination of the Reversible Gelatin Gelling System... 

Method for determining the G value of cross-HnEing of a polymer by gel-point determination... 

Infrared spectroscopy. Due to experimental difficulties, infrared spectroscopy is used infrequently in these kinetic studies. However, continuous measurements have been carried out by Fellers in the case of polyacid-epoxy condensation reaction for gel point determination. 

The prediction power of BOB calculation was evidenced by the results shown above for viscoelasticity over wide frequency range. However, the viscoelasticity calculation is presently limited for pre-gel state. It has already found that the calculation values inevitably disagree with G (co) and G"((o) data of PPS star when p approaches to the gel point determined by eq.(21). Furthermore, the architecture of the branched polymer becomes complex as the increase in functionalities for RA/ + R Byi, type reaction, which BOB does not cover with. These are future works toward the comprehensive establishment of the calculation methods for the gelling system... 

Fatimi, A., Axelos, M.A., Tassin, J.F., Weiss, R, 2008. Rheological characterization of self-hardening hydrogel for tissue engineering applications gel point determination and viscoelastic properties. Macromolecular Symposia 12 Wiley Online Library. 

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