Temperature Study of Sound Velocity and Volume-Related Specific Thermodynamic Properties of Aqueous Solutions of Poly(ethylene oxide)–Poly(propylene oxide) –Poly (ethylene oxide) Triblock Copolymers

Isothermal titration calorimetry and dynamic light scattering studies of interactions between gemini surfactants of different structure and Pluronic block copolymers

“…Previous work in our lab has shown that changes in the specific volume of the triblock copolymers upon aggregation is less than 2% [26] and in the case of the surfactants less than 10% [15]. This assumption should not contribute significant error to the data evaluation using Eqs.…”

Thermodynamics of micellization of tapered statistical copolymers of ethylene oxide and propylene oxide in water

“…5, the concentrations have been converted from weight percentages to grams per cubic decimeter, assuming additivity by mass fraction and using reported values of specific volumes of poly(oxyethylene) and poly(oxypropylene) [15] and of water. Concentrations in grams per cubic decimeter were also calculated using reported values of the partial specific volumes of the two components, the unimeric state in water [16]. The concentration dependences of the cmt found for the two copolymers do not differ significantly.…”

Monitoring the aggregation behaviour of self-assembling polymers through high-resolution ultrasonic spectroscopy

“…The authors decided to use high-resolution ultrasonic spectroscopy, a relatively new technique, which allows high-resolution measurement of ultrasonic velocity and attenuation in different samples during a temperature scan (Buckin et al, 2002). Several previous papers used sound speed measurements in order to derive some thermodynamic parameters (isentropic compressibility and apparent molar isentropic compressibility) commonly applied during the analysis of aggregation processes (Wen and Verrall, 1997;Senkow et al, 2002;Roux et al, 2005;Fisicaro et al, 2006). However, the direct use of the ultrasonic parameters obtained during a temperature scan is rarely reported for the monitoring and characterization of copolymer self-assembling properties (Wen and Verrall, 1997).…”