Miscibility and morphological properties of quaternized polysulfone blends with polystyrene and poly(4‐vinylpyridine)

Albu, Raluca Marinica; Avram, Ecaterina; Stoica, Iuliana; Ioanid, Emil Ghiocel; Ioan, Silvia

doi:10.1002/pc.21198

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…Various mathematical equations are used in literature for calculating the intrinsic viscosity [η] of a polymeric solution, by graphic extrapolation (eqn. [1][2][3][4] and from a single point viscometry measurement of dilute solution (eqn. [5][6].…”

Section: Preparation Of 44'-methylenebis(cinnamaldehyde) (Mbc) and Tmentioning

confidence: 99%

“…Characterization of this polymer has been done extensively by techniques like infrared spectroscopy (FTIR), ultraviolet/visible spectroscopy (U/V spectroscopy) and nuclear magnetic resonance (NMR). The thermal analysis as well viscosity measurement was observed from these derived Schiff base polymers 2,3 . The solubility of bis(cinnamaldehyde) and their Schiff base polymeric solutions were taken in highly polar solvents (DMF/THF) at 30 ºC 4 , to investigate viscometric study by dilute solution viscometry (DSV) method.…”

Section: Introductionmentioning

confidence: 99%

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Viscometric Study of Bis(cinnamaldehyde) and Their Schiff Base Polymers in DMF and THF Solution at 30 ºC

Shah¹,

Shah²

2013

Asian J. Chem.

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Viscometric parameter is a simplest method to determine molecular shape, size and weight. Bis(cinnamaldehyde) and their Schiff base polymeric solutions were prepared in DMF and THF at 30 ºC, to investigate viscometric study by dilute solution viscometry method. The intrinsic viscosity and viscometric constants of these solutions were calculated by six different equations such as Huggins, Kramer, Martin and Schulz-Blaschke equations by graphic extrapolation and Solomon-Ciuta, Deb-Chantterjee equations through a single point determination, which represents the advantage of being a faster method. The thermodynamic parameters e.g., ∆G, ∆S and ∆H, were also calculated by equation related with dilute solution viscometry method. The molecular mass of polymers was determined by applying Mark-Howwink-Sakurada equation. The results obtained that the single point determination can be applied and Deb-Chantterjee equation showed to be the most appropriate for those calculations.

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Section: Preparation Of 44'-methylenebis(cinnamaldehyde) (Mbc) and Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Viscometric Study of Bis(cinnamaldehyde) and Their Schiff Base Polymers in DMF and THF Solution at 30 ºC

Shah¹,

Shah²

2013

Asian J. Chem.

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“…These influences can generate different flow behaviors, such as Newtonian, shear thinning, or shear thickening flow. Previous studies on the PSFQ, PSF‐DMEA, and PSF‐DMOA quaternized polysulfones obtained by quaternized reactions of chloromethylated polysulfones with N , N ‐dimethylethanolamine,31 N , N ‐dimethylethylamine,32 and N , N ‐dimethyloctylamine,32 respectively, show these aspects, and also that the activation energy, including disengagement and association phenomena, is modified in correlation with the hydrophobic characteristics of the modified polysulfones, which decrease in the following order: PSFP > PSF‐DMOA > PSF‐DMEA > PSFQ. Thus, for a more hydrophobic character of polymers, the association phenomena become predominant.…”

Section: Resultsmentioning

confidence: 99%

Influence of triphenylphosphonium pendant groups on the rheological and morphological properties of new quaternized polysulfone

Buruiana¹,

Avram²,

Popa

et al. 2012

J of Applied Polymer Sci

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A new quaternized polysulfone with triphenylphosphonium pendant groups was synthesized by reacting chloromethylated polysulfone with triphenylphosphine. The molecular restructurations, generated by hydrogen bonding, electrostatic interactions, and association phenomena in ternary quaternized polysulfone/N,N-dimethylformamide (solvent)/water (nonsolvent) systems, were evaluated by rheological investigations. The polyelectrolyte effect, induced by enhanced dissociation of the ionizable groups and by mixed solvents' quality, modify the rheological functions, that is, dynamic viscosity, elastic shear modulus, and viscous shear modulus, as well as the thermodynamic parameters obtained from the rheological properties, such as apparent activation energy. These results were correlated with the morphological properties of the films obtained from solutions in solvent/nonsolvent mixtures and compared with other quaternized polysulfones, having different hydrophobic characteristics.

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“…The irreversibility indicated a higher stability and better persistence via influences from the environment. Recent studies have resulted in the quaternization of PS4VP membranes to improve antifouling and antibacterial capacities, but no detailed investigation about the downsizing of pores has been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of dual‐layer poly(styrene‐b‐4‐vinyl pyridine)–poly(vinylidene fluoride) membranes with tailored pore sizes under 10 nm via surface quaternization

Liu²,

Liu

et al. 2018

J of Applied Polymer Sci

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Block copolymer membranes can be applied to precise size-based separation because of their highly ordered surface morphology and adjustable pore sizes. However, there is a lower limit of the scale of block copolymer self-assembly; this makes it a challenge to tailor the pore size down to below 10 nm. In this study, poly(styrene-b-4-vinyl pyridine) membranes were modified to quaternized selective layers with pores smaller than 10 nm and were supported by poly(vinylidene fluoride) hollow fibers as the substrate to provide a high mechanical strength. Two reactants, methyl iodide and 2-chloroacetamide, were used in the quaternization. With this one-step chemical modification, the molecular weight cutoff was reduced from 190 to 8 kDa, and the surface pore sizes were narrowed down from 20-30 to 3 nm; this bridged the gap of tailored pore sizes down to below 10 nm. Such membranes are promising candidates for low-molecular-weight separation with high resolution.

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Miscibility and morphological properties of quaternized polysulfone blends with polystyrene and poly(4‐vinylpyridine)

Cited by 8 publications

References 26 publications

Viscometric Study of Bis(cinnamaldehyde) and Their Schiff Base Polymers in DMF and THF Solution at 30 ºC

Viscometric Study of Bis(cinnamaldehyde) and Their Schiff Base Polymers in DMF and THF Solution at 30 ºC

Influence of triphenylphosphonium pendant groups on the rheological and morphological properties of new quaternized polysulfone

Fabrication of dual‐layer poly(styrene‐b‐4‐vinyl pyridine)–poly(vinylidene fluoride) membranes with tailored pore sizes under 10 nm via surface quaternization

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