Poly(ammonium sulfopropylbetaine)s: 5. Interactions in dilute aqueous solution with low molecular weight salts or zwitterions and with poly(electrolyte)s

Knoesel, R.; Ehrmann, Marc; Galin, J. C.

doi:10.1016/0032-3861(93)90437-f

Cited by 29 publications

(24 citation statements)

References 33 publications

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“…Both liquids are good solvents of the polymer [24,25] and, as expected, the plasticized samples show a very strong decrease of the glass transition temperature (from 133 down to 0°C for W (liquid) = 0.03) and a simultaneous broadening of the transition from 16°C for the pure polymer up to more than 30°C. The T g depression may be analyzed according to the Couchman equation in its simplified form [26]:…”

Section: Polyzwitterion Blends With Polar Organic Additivesmentioning

confidence: 88%

“…Weak interactions between the poly(zwitterion) M-2OE-3 and a low molecular model of identical structure, triethylammoniopropanesulfonate (Z1), have already been observed in dilute aqueous solution [25]: slightly increased chain expansion in the presence of the additive, but far less significant than in the presence of the homologous electrolyte. It was thus of interest to study the zwitterion-poly-(zwitterion) blends in bulk and the experiments were performed using the same monofunctional Z1 and difunctional zwitterion Z2 given below:…”

Section: Polyzwitterion Blends With Polar Organic Additivesmentioning

confidence: 92%

See 1 more Smart Citation

Poly(ammonioalkanesulfonate) Blends with Polar Organic Species and Alkali Metal Salts: Structure, Glass Transition and Ionic Conductivity

Galin¹,

Marchal²,

Mathis³

et al. 1997

Polym. Adv. Technol.

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Section: Polyzwitterion Blends With Polar Organic Additivesmentioning

confidence: 88%

Section: Polyzwitterion Blends With Polar Organic Additivesmentioning

confidence: 92%

Poly(ammonioalkanesulfonate) Blends with Polar Organic Species and Alkali Metal Salts: Structure, Glass Transition and Ionic Conductivity

Galin¹,

Marchal²,

Mathis³

et al. 1997

Polym. Adv. Technol.

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“…The strong dependence of the cloud points of P-1 on the concentration and on the type of added inorganic salts, in particular on the anion type in close correlation to the Hofmeister series, is well established. [20][21][22][23]43,57,[77][78][79][80][81][82] Therefore, the strong effects of the added salts and their relative impacts, observed for structurally closely related polymers P-2-P-8 are not surprising. Still, the widespread perception that the interaction of salts with polysulfobetaines can be treated as a general saltingin effect is not adequate, as evident from the evolution of the cloud points as a function of salt concentration.…”

mentioning

confidence: 99%

Effect of the zwitterion structure on the thermo-responsive behaviour of poly(sulfobetaine methacrylates)

Hildebrand

Laschewsky

Päch³

et al. 2017

Polym. Chem.

135

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A series of new sulfobetaine methacrylates, including nitrogen-containing saturated heterocycles, was synthesised by systematically varying the substituents of the zwitterionic group. Radical polymerisation via the RAFT (reversible addition-fragmentation chain transfer) method in trifluoroethanol proceeded smoothly and was well controlled, yielding polymers with predictable molar masses. Molar mass analysis and control of the end-group fidelity were facilitated by end-group labeling with a fluorescent dye. The polymers showed distinct thermo-responsive behaviour of the UCST (upper critical solution temperature) type in an aqueous solution, which could not be simply correlated to their molecular structure via an incremental analysis of the hydrophilic and hydrophobic elements incorporated within them. Increasing the spacer length separating the ammonium and the sulfonate groups of the zwitterion moiety from three to four carbons increased the phase transition temperatures markedly, whereas increasing the length of the spacer separating the ammonium group and the carboxylate ester group on the backbone from two to three carbons provoked the opposite effect. Moreover, the phase transition temperatures of the analogous polyzwitterions decreased in the order dimethylammonio > morpholinio > piperidinio alkanesulfonates. In addition to the basic effect of the polymers' precise molecular structure, the concentration and the molar mass dependence of the phase transition temperatures were studied. Furthermore, we investigated the influence of added low molar mass salts on the aqueous-phase behaviour for sodium chloride and sodium bromide as well as sodium and ammonium sulfate. The strong effects evolved in a complex way with the salt concentration. The strength of these effects depended on the nature of the anion added, increasing in the order sulfate < chloride < bromide, thus following the empirical Hofmeister series. In contrast, no significant differences were observed when changing the cation, i.e. when adding sodium or ammonium sulfate.

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“…Higher charge density polymers are largely insoluble in pure water and require addition of a critical concentration of salt for solubilization (5,8,9,11,12,13,14,15). Low charge density polyampholytes can be solubilized in water provided comonomers are sufficiently hydrophilic (16).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Aqueous Solution Behavior of Novel pH Responsive, Zwitterionic Cyclocopolymers

Thomas

Armentrout

McCormick

2000

Stimuli-Responsive Water Soluble and Amphiphilic Polymers

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Poly(ammonium sulfopropylbetaine)s: 5. Interactions in dilute aqueous solution with low molecular weight salts or zwitterions and with poly(electrolyte)s

Cited by 29 publications

References 33 publications

Poly(ammonioalkanesulfonate) Blends with Polar Organic Species and Alkali Metal Salts: Structure, Glass Transition and Ionic Conductivity

Poly(ammonioalkanesulfonate) Blends with Polar Organic Species and Alkali Metal Salts: Structure, Glass Transition and Ionic Conductivity

Effect of the zwitterion structure on the thermo-responsive behaviour of poly(sulfobetaine methacrylates)

Synthesis and Aqueous Solution Behavior of Novel pH Responsive, Zwitterionic Cyclocopolymers

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