Thermodynamic Behavior of Non-Ionic Tri-block Copolymers in Water at Three Temperatures

A thermodynamic study to evidence the -dichloroalkane/ block copolymer mixed aggregates formation: Effect of the copolymer architecture

“…where m A and M are the molality and the molecular weight of the additive, respectively; d is the density of the water + additive + copolymer mixture; and d o is the density of the water + copolymer system [23]. V Φ,A of each additive in water was also determined.…”

“…(7), where x C = 0. Table 1 Thermodynamic properties of aggregated copolymers and additives in water at 298 and 305 K a [23]. c Calculated through the additivity rule.…”

“…The K M , N , and V m values of both L35 and 10R5 were taken from elsewhere [23]. B V,AP was determined from the slope of the V t vs m P trend in the very dilute region.…”

“…The additives are pro- totype inquinants, i.e., dichloromethane, 1,2-dichloroethane, and 1,3-dichloropropane; the higher homologues were not analyzed because their low solubility in water [21] prevented reliable experimental volumes from being obtained. (Ethylene oxide) 11 (propylene oxide) 16 (ethylene oxide) 11 and (propylene oxide) 8 (ethylene oxide) 23 (propylene oxide) 8 were selected to investigate the role of the architecture by keeping constant the molecular weight and the hydrophilic/hydrophobic balance. Finally, the Flory theory applied to the solubilization in block copolymer aggregates provided information consistent with the experimental data.…”

Selectivity of cyclodextrins as a parameter to tune the formation of pseudorotaxanes and micelles supramolecular assemblies. A systematic SANS study

“…where x is (qR g ), 2 c P is the free copolymer concentration (g cm À3 ), M w is the copolymer molecular weight, N Av the Avogadro number, d p the density of the copolymer, 33 whereas r p is the scattering length density of the copolymer calculated from the scattering length density of each block (Table 1). In principle, R g is the only fitting parameter in eqn (4) given that the free copolymer concentration is defined by the mass balance in the mixture.…”