Some structural studies on highly substituted cellulose cyanoethylates (CCE)

The Entropic Mechanism of Water Solvation of Polymers

“…= 0.13 g/g. Moreover, all mentioned isotherms are transformed onto the isotherm of water sorption by cyanoethylated cellulose films with the substitution degree y = 287.3, studied in the work [26] (it coefficients were a. = 8%, E = 1250 J/mol,…”

“…(2) are: To = 5"C, aoo = 0.135 gig, E = 1850 J/mol, n = 0.7, a = 0.002grad-'), CTA [18] ( T = 25"C, coefficients are a. = 0.13 g/g, E = 1250J/mol, n = 0.7), Nylon-6,6 [25] ( T = 25"C, a0 = 6.8%, E = 1600, n = 0.7), cyanoethylated cellulose with the substitution degree y = 287.3 [26] (ao = 8%, E = 1250, n = 0.7). Even the isotherm of ethylcellulose shown in the work [27], which displays poorly expressed pseudo-Langmuir part, is well described by Eq.…”

The Entropic Mechanism of Water Solvation by Polymers

“…Sigmoid isotherms are also displayed by more strongly hydrophilic polymers: nylon-6 5 (coefficients of Equation 2 are T 0 = 5°C, a 00 = 0.135 g/g, E = 1850 J/mol, n = 0.7, α = 0.002 grad -1 ), CTA 18 (T = 25°C, coefficients are a 0 = 0.13 g/g, E = 1250 J/mol, n = 0.7), nylon-6,6 25 (T = 25°C, a 0 = 6.8% E = 1600, n = 0.7), cyanethylated cellulose with the substitution degree γ = 287.3 26 (a 0 = 8%, E = 1250, n = 0.7). Even ethylcellulose 27 , which displays a badly distorted pseudo-Laugmuir part, is well described by Equation 4 with coefficients a 0 = 7.4%, E = 800, n = 0.6.…”

“…Present curves also transform into each other and, moreover, can be transformed by CTA films 18 , into water sorption isotherms described by Equation (4) with the same coefficients E and n at a 0 = 0.13 g/g. Moreover, all mentioned isotherms are transformed onto the isotherm of water sorption by cyanoethylated cellulose films with the substitution degree γ = 287.3, studied by Kim 26 (coefficients were a 0 = 8%, E = 1250 J/mol, n = 0.7).…”