Interactions of ethylene oxide/methylene oxide copolymers with sodium dodecyl sulphate

Benkhira, A.; Bagassi, M.; Lachhab, T.; Rudatsikira, A.; Reibel, L.; François, Jeanne

doi:10.1016/s0032-3861(00)00088-4

Cited by 12 publications

(8 citation statements)

References 32 publications

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“…In a first set of experiments, I 1 / I 3 was measured as a function of SDS concentration to follow the micellization process and to determine the order of magnitude of the CMC 24. 25 In a second set, we obtained the aggregation number of the micelles from the fluorescence decrease of the probe as a function of the concentration [Q] of a fluorescence inhibitor,26–28 the relationship according to: I 0 is the fluorescence intensity in absence of inhibitor and [Mi] is the concentration of micelles.…”

Section: Methodsmentioning

confidence: 99%

Study of sodium dodecyl sulfate/poly(propylene oxide) methacrylate mixed micelles for the synthesis of thermo‐associative polymers by micellar polymerization

Bastiat¹,

Grassl²,

François³

2002

Polymer International

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Water soluble associative polymers based on polyacrylamide (PAM) grafted with short poly(propylene oxide) (PPO) chains as pendant groups were synthesized. Two different methods were used (1) homogeneous (water + acetonitrile) (2) micellar copolymerization, in the presence of sodium dodecyl sulphate (SDS) to solubilize the hydrophobic comonomer, PPO methacrylate (PPOMA). As expected from the literature, random or blocky distribution of PPO along the PAM chain, respectively, is obtained by these two methods. This work focuses on the characterization of the micellar reactional medium in order to have a good estimate of the length of the PPO sequences along the main chain. An extensive study of the mixture SDS/PPOMA was performed, by using fluorimetry, light scattering and conductimetry, to characterize the initial mixed micelles (critical micellar concentration and aggregation number). It is shown that the total aggregation number of the micelles and that of SDS decrease when the concentration of PPOMA increases. In addition, preliminary turbidimetry and viscosimetry studies of the thermo‐associative properties of the two polymers are given. © 2002 Society of Chemical Industry

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Section: Methodsmentioning

confidence: 99%

Study of sodium dodecyl sulfate/poly(propylene oxide) methacrylate mixed micelles for the synthesis of thermo‐associative polymers by micellar polymerization

Bastiat¹,

Grassl²,

François³

2002

Polymer International

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“…The LCST behavior is known to be highly dependent on the molecular weight of PEG that the LCST of PEG aqueous solutions decreased with an increasing molecular weight of PEG. − Typically, for PEG with a molecular weight around 2000 g·mol –1 , the LCST is about 170–180 °C . However, as shown in Figure c,d and Figure S8, the CP was about 100–130 °C.…”

Section: Results and Discussionmentioning

confidence: 97%

Core–Shell Copolymers with Brush-on-Hyperbranched Arm Architecture: Synthesis, Dual Thermoresponsive Behaviors, and Nanocarriers

et al. 2021

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A series of core−shell copolymers with brush-on-hyperbranched arm architecture were synthesized and characterized in detail. These copolymers were prepared via the combination of cationic ring-opening polymerization (CROP) and azide-alkyne "click" chemistry. The primary hyperbranched polyether core (HPEHO) was synthesized via the CROP of 3-ethyl-3-(hydroxymethyl)oxetane (EHO). Subsequently, the outer layer of glycidyl azide polymer (GAP) linear arms was prepared through the CROP of epichlorohydrin (ECH), followed by azidation of the chlorine atoms. Poly(ethylene glycol) (PEG) was last grafted onto the GAP chains via "click" reaction to obtain an amphiphilic core−shell structure. These core−shell copolymers exhibited a lower critical solution temperature (LCST)-type behavior in aqueous solutions. The LCST cloud point (CP) temperature not only decreased with an increasing polymer concentration but also was dependent on the molecular architecture that it increased upon increasing the PEG brush lengths and GAP arm lengths. More interestingly, while the free PEG chains were completely soluble in THF, an upper critical solution temperature (UCST) transition was observed for these core−shell copolymers in THF, and the CP shifted toward higher temperatures with increasing GAP linear arm lengths and concentrations. Last, the PEG outer shell and hydrophobic interior polyether core made these copolymers decent nanocarriers for hydrophobic cargo molecules in aqueous solutions.

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“…The changes in vesicle dimensions should reflect the thermo-responsiveness of the PEG chains and the phase separation behavior of the LC block copolymers. The LCST of a 2000 Da PEG homopolymer is around 170-180 C, [30][31][32][33] but this value can be reduced depending on the molecular environment. For example, LCSTs of 8-81 C were reported for some PEG chains connected to dendrimers.…”

Section: Capsule Dimensions (Radius Volume Of Internal Aqueous Compar...mentioning

confidence: 99%

“…In addition, the PEG is known to be thermo-responsive and has a Lower Critical Solution Temperature (LCST) that depends upon its molecular environment 28,29 and its molecular weight. [30][31][32][33] The LCST is around 170-180 C for a 2000 Da PEG homopolymer and 100 C for PEG having an infinite molecular weight. Even below the LCST, water becomes a significantly poorer solvent for PEG chains as the temperature is increased between 0 and 100 C and the chains undergo progressive ''dehydration''.…”

Section: Introductionmentioning

confidence: 99%

Structural changes in liquid crystal polymer vesicles induced by temperature variation and magnetic fields

et al. 2011

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Interactions of ethylene oxide/methylene oxide copolymers with sodium dodecyl sulphate

Cited by 12 publications

References 32 publications

Study of sodium dodecyl sulfate/poly(propylene oxide) methacrylate mixed micelles for the synthesis of thermo‐associative polymers by micellar polymerization

Study of sodium dodecyl sulfate/poly(propylene oxide) methacrylate mixed micelles for the synthesis of thermo‐associative polymers by micellar polymerization

Core–Shell Copolymers with Brush-on-Hyperbranched Arm Architecture: Synthesis, Dual Thermoresponsive Behaviors, and Nanocarriers

Structural changes in liquid crystal polymer vesicles induced by temperature variation and magnetic fields

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