Study of heat of micellization and phase separation for Pluronic aqueous solutions by using a high sensitivity differential scanning calorimetry

Glycine elicited self-assembly of amphiphilic star block copolymers with contradistinct hydrophobicities

“…That is, no distinct peak was observed and identified as the CP of the 1wt% T1304 system. On the other hand, a distinct and sharp peak [44] at 113 °C was observed and identified as the CP of 1wt% T1307 system, as shown in Fig. 2.…”

“…The moderately hydrophobic 1wt% T1304 aqueous solution tends to undergo micelle formation at lower temperatures as compared to that of 1wt% T1307 aqueous solution. Tsui et al [44] determined the CMTs, ∆H and CPs of different Pluronics ® (having same PPO unit) using HSDSC to examine the effect of PEO on their micellization. They concluded that the longer hydrophilic chain in the polymer composition makes the micellization process more difficult and consequently micellization takes place at higher/elevated temperatures.…”

“…Table 3 . For thermodynamic analysis of micellization process, the Gibbs free energy change of micellization ∆G and the entropy change of micellization ∆S were calculated by closely following the procedure proposed in the previous studies [44,45,[58][59][60]. All the thermodynamic properties extracted from the thermograms are reported in Table 3.…”

“…A progressive baseline, which was determined from the extrapolation of pre-and post-transitional portions of the peak into the transition region, was chosen for peak area integration. The area between the HSDSC thermogram and the progress baseline was integrated and defined as the heat of micellization ∆H [43][44][45].…”

Calorimetric and Scattering Studies on Micellization of Pluronics in Aqueous Solutions: Effect of the Size of Hydrophilic PEO End Blocks, Temperature, and Added Salt

“…[14] Extensive work using several techniques on the effect of additives on micellization and phase behavior of EO-PO copolymers showing significant influence on CMC, CMT, cloud point (CP), and gelation region has been done by Bahadur et al [12,13,[15][16][17][18] High-sensitivity differential scanning calorimetry (HSDSC) has been used to identify phase transition and micellization of Pluronics. [19][20][21] Liu et al [22,23] used nuclear magnetic resonance (NMR) to study the micellization of these polymeric surfactants. Small-angle neutron scattering (SANS) has also been used to study the size and shape of Pluronic micelles.…”