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Copolymers of N-vinyl-2-pyrrolidone and 2-(dimethylamino)ethyl methacrylate, 3. Viscosity of quaternized copolymers in aqueous solution

✍ Scribed by Karine Deboudt; Michèle Delporte; Claude Loucheux

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
513 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

N‐Vinyl‐2‐pyrrolidone (VP) — 2‐(dimethylamino)ethyl methacrylate (DMAEM) copolymers were quaternized with octyl, dodecyl or hexadecyl bromide. The behaviour of the modified copolymers in aqueous solutions was studied by viscosimetry. As typical of classical polyelectrolytes, by increasing the ionic strength of the solutions, their viscosity decreases. Since the DMAEM mole fraction in the modified copolymers is low, the pH of the solutions does not have a great influence on the extension of the macromolecules. The influence of the size of the alkyl chains and of the mole fraction of quaternized units were studied: the formation of hydrophobic microdomains is easier for copolymers which have a low fraction of long quaternized units than for copolymers with a high mole fraction of short quaternized units.

📜 SIMILAR VOLUMES

Copolymers of N-vinyl-2-pyrrolidone and
Copolymers of N-vinyl-2-pyrrolidone and 2-(dimethylamino)ethyl methacrylate, 1. Synthesis, characterization, quaternization
✍ Karine Deboudt; Michèle Delporte; Claude Loucheux 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 468 KB

## Abstract 2‐(Dimethylamino)ethyl methacrylate (DMAEM) — __N__‐vinyl‐2‐pyrrolidone (VP) copolymers were synthesized and characterized. The copolymerization parameters were determined: __r__~VP~ = 0,61, __r__~DMAEM~ = 11,41. The tacticity of DMAEM sequences and the distribution of monomer units wer

Copolymers of N-vinyl-2-pyrrolidone and
Copolymers of N-vinyl-2-pyrrolidone and 2-(dimethylamino)ethyl methacrylate, 2. Quaternization with octyl bromide — kinetic studies
✍ Karine Deboudt; Michèle Delporte; Claude Loucheux 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 491 KB

N-Vinyl-2-pyrrolidone -2-(dimethy1amino) ethyl methacrylate copolymers were quaternized with octyl bromide in tetramethylene sulfone. The quaternization kinetics was studied, varying the concentrations of reagents and the composition of copolymers. The initial rate constant is not disturbed by the

Sequencing of N-vinyl-2-pyrrolidone/glyc
Sequencing of N-vinyl-2-pyrrolidone/glycidyl methacrylate copolymers by one-dimensional and two-dimensional nuclear magnetic resonance spectroscopy
✍ A. S. Brar; Rajeev Kumar 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 317 KB 👁 2 views

## Abstract Copolymers of __N__‐vinyl‐2‐pyrrolidone (V) and glycidyl methacrylate (G) monomers of different compositions were prepared by free‐radical solution polymerization. The copolymer composition of these copolymers was determined with ^1^H‐NMR spectra. The reactivity ratios calculated from t