Swelling coefficient

Fig. I. Steady structure of crosslinked MA-EDMA copolymers obtained in solutions of acetic add of different concentrations. K — relative swelling coefficient, Ks — swelling coefficient (by a = 0 and a = 0.5, respectively)...

Fig. 3. Change in relative swelling coefficient Kw during ionization of macroreticular MA-EDMA copolymers obtained in 30% Ac A solution (1-4) and heteroreticular MA-EDMA copolymers obtained in 5% Ac A solution (5,6) with different amounts of the crosslinking agent — EDMA (mol%) /) 1.0 2) 1.5 3) 2.5 4) and 5) 4.0 6) 10.0...

Fig. 4. Swelling coefficients of crosslinked MA-DMEG copolymers as a function of the content of the crosslinking agent 1) pH 2.8 2) pH 12.5...

Figure 3.6 The relationship between swelling coefficient (S%) and WPG for a variety of linear chain anhydrides (from data of Hill and Jones, 1996a).

Gonflement, Coefficient de. Fr for Swelling Coefficient. See Coefficient de gonflement in Vol 3, p C389-R... 

Fr) (Swelling Coefficient or Swelling Power). Its definition and test method are briefly described in Vol 2 of Encyclopedia, pCll6-R under Ref 14... 

Erman B, Flory PJ (1978) Theory of elasticity of polymer networks. II The effect of geometric constraints on junctions. J Chem Phys 68 5363—5369 Erukhimovich IYa, Irzhak VI, Rostiashvili VG (1976) On concentration dependence of swelling coefficient of weakly non-Gaussian macromolecules. Polym Sci USSR 18 1682-1689... 

E Elastic modulus, Ib/sq in k Thermal conductivity, Btu/ft -hr-°F q Swelling coefficient, dimensionless 0 Coefficient of thermal expansion, in/in- F fl Poisson s Ratio, dimensionless h Film heat transfer coefficient, Btu/ft -hr-°F N Number of layers in the lining R Thermal resistance, per axial foot T Temperature... 

Tables I, II, and III give volumetric swelling coefficients for southern pine sapwood for various potential reagents, catalysts, and solvents (JO). These coefficients were determined under two sets of conditions. Specimens from oven-dried southern pine sapwood blocks were measured and their volumes were determined. Ten specimens from this set were submerged in a solution and either treated at 120 °C and a pressure of 150 Ib/in. for 1 h, or they were soaked at 25 for 48 h.

Table II. Volumetric Swelling Coefficients (S) for Southern Pine Sapwood in Various Catalysts...

Volumetric swelling coefficient determined from initial oven-dry volume and first water-swollen volume. Antishrink efficiency based on Sj. 

To interpret their effectiveness swelling coefficients are first calculated using the method reported by Stamm (1964) ... 

Ati is the osmotic pressure difference, d is the material dependent swelling coefficient and and are the concentrations in the gel and in the solution, respectively. 

Table 28 reports the maximum swelling coefficient Qmail, the time needed to reach this equilibrium state tmax, and the constants k and n that characterize the water sorption profiles according to the equation [166] ... 

Table 28. Values of maximum swelling coefficient Qraax, time to reach this state tm3I, and kinetic parameters1 for two MC hydrogels crosslinked by various agents2... 

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