Quaternary Ammonium Polyelectrolytes. V. Amination Studies of Chloromethylated Polystyrene with<i>N,N</i>-Dimethylalkylamines

Luca, Cornelia; Avram, Ecaterina; Petrariu, I.

doi:10.1080/00222338808053373

Cited by 31 publications

(21 citation statements)

References 9 publications

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“…The reaction time was of 48 h, at 608C. [13] The characteristics of the obtained PSFQ are presented in Table 2. The contents in ionic chlorine, Cl i , and total chlorine were determined by potentiometric titration (Titrator TTT1C Copenhagen) with 0.02 N AgNO 3 aqueous solutions.…”

Section: Methodsmentioning

confidence: 99%

Influence of Mixed Solvents and Temperature on the Solution Properties of Quaternized Polysulfones

Filimon¹,

Avram²,

Ioan³

2007

Journal of Macromolecular Science, Part B

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Modification of intrinsic viscosity and the preferential adsorption coefficients of quaternized polysulfones with various contents of ionic chlorine in N,N-dimethylformamide/water and methanol/water mixed solvents was investigated at different compositions and temperatures. The polyelectrolyte effect induced by an enhanced dissociation of the ionizable groups determines both the modification of the swelling degree of the polymer coil and the difference in composition of the mixed solvent inside and outside the coil. The results obtained were correlated with the interaction parameters of the above-mentioned polymer/solvent/solvent systems.

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Section: Methodsmentioning

confidence: 99%

Influence of Mixed Solvents and Temperature on the Solution Properties of Quaternized Polysulfones

Filimon¹,

Avram²,

Ioan³

2007

Journal of Macromolecular Science, Part B

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“…22 Finally, the samples were dried in vacuo at 40 C. CMPSF was dissolved in N,Ndimethylformamide (DMF) vacuum-distilled over P 2 O 5 , after which the N,N-dimethylethanolamine (DMEA) quaternized derivative was poured into the reactor. The reaction time was 48 h at 60 C. 24 The characteristics of the studied PSFQs are presented in Table I. The ionic chlorine and total chlorine contents were determined by potentiometric titration (Titrator TTT1C Copenhagen, Denmark) with 0.02N AgNO 3 aqueous solutions.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…19,20 In addition, functional groups are an intrinsic requirement for affinity, ionexchange, and other specialty membranes. 21 In previous publications, the synthesis [22][23][24] and some solution properties 17,18,[25][26][27][28] of new PSFs have been presented. Studies have been carried out on the quaternization reaction of chloromethylated polysulfones (CMPSFs) for obtaining water-soluble polymers with various amounts of ionic chlorine.…”

Section: Introductionmentioning

confidence: 99%

Surface properties and antibacterial activity of quaternized polysulfones

Filimon¹,

Avram²,

Dunca

et al. 2009

J of Applied Polymer Sci

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Novel quaternized polysulfones (PSFs) with two ionic chlorine contents were investigated, namely, their morphology and antimicrobial activity. Atomic force microscopy (AFM) studies on their membranes showed ordered domains, in which pores and nodules of different sizes and intensities were distributed. The charge density of the quaternized PSFs and the history of the membranes formed from solutions in solvent/nonsolvent mixtures influenced the different aspects of the surface images. The adhesion of Escherichia coli ATCC 10536 and Staphylococcus aureus ATCCC 6538 microorganisms to solutions of the modified PSFs is discussed in correlation with the hydrophobic/hydrophilic properties of the studied polymers and microorganisms.

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“…21,22 In addition, functional groups are an intrinsic requirement for affinity, ion-exchange, and other specialty membranes. 23 In previous publications, the synthesis [24][25][26] and some solution properties 19,20,[27][28][29][30][31] of modified PSFs have been presented. Studies of the quaternization reaction of chloromethylated polysulfones (CMPSFs) have been carried out to obtain water-soluble polymers with various amounts of ionic chlorine.…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of quaternized polysulfone films and biocompatibility studies

Ioan¹,

Albu²,

Avram³

et al. 2011

J of Applied Polymer Sci

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A novel quaternized polysulfone with N-dimethyloctylammonium groups was investigated with respect to its surface properties, hydrophobicity, interactions with blood, and morphology. The history of the films formed from N,N-dimethylformamide/methanol and N,Ndimethylformamide/water solutions and the compositions of the solvent/nonsolvent mixtures influenced the surface morphology. Thus, atomic force microscopy investigations of the films showed pores and nodules of different sizes and intensities, which depended on the content of methanol or water in the solvent mixtures. Hydrophilicity modification, evidenced by the apolar components and the electron-acceptor and electron-donor parameters of the polar components of the surface tension parameters, was correlated with atomic force microscopy data. Surface wettability trends were analyzed on the basis of the free energy of hydration between the prepared films and water and the work of adhesion. The adhesion of red blood cells to the modified polysulfone showed the influence of the hydrophobic properties.

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Quaternary Ammonium Polyelectrolytes. V. Amination Studies of Chloromethylated Polystyrene withN,N-Dimethylalkylamines

Cited by 31 publications

References 9 publications

Influence of Mixed Solvents and Temperature on the Solution Properties of Quaternized Polysulfones

Influence of Mixed Solvents and Temperature on the Solution Properties of Quaternized Polysulfones

Surface properties and antibacterial activity of quaternized polysulfones

Surface characterization of quaternized polysulfone films and biocompatibility studies

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