Advanced

Synthesis of boronate-contaming copolymers of N,N-dimethylacrylamide, their interaction with poly(vinyl alcohol) and rheological behaviour of the gels

Ivanov, Alexander LU ; Larsson, Helena LU ; Galaev, Igor LU and Mattiasson, Bo LU (2004) In Polymer 45(8). p.2495-2505
Abstract
Cross-linking of polyvinylalcohol (PVA) by boronate-containing copolymer of N,N-dimethylacrylamide (DMAA, 1) was studied and compared to cross-linking of PVA by borate buffers in weakly alkaline solutions. The copolymer of M-w = 19,000 g mor(-1) containing 9 mol% N-acryloyl-m-aminophenylboronic acid (NAAPBA, 2) was prepared by free radical polymerization of the monomers, exhibiting copolymerization constants r(1) = 0.84 and r(2) = 2.2. Due to multipoint interaction of the copolymer with PVA via monodiols, the intermolecular cross-linking required for seven-fold and 10-fold lower boron concentrations as compared to borate buffers of pH 8.6 and 7.5, respectively. In theological measurements, PVA-copolymer gels exhibited storage moduli... (More)
Cross-linking of polyvinylalcohol (PVA) by boronate-containing copolymer of N,N-dimethylacrylamide (DMAA, 1) was studied and compared to cross-linking of PVA by borate buffers in weakly alkaline solutions. The copolymer of M-w = 19,000 g mor(-1) containing 9 mol% N-acryloyl-m-aminophenylboronic acid (NAAPBA, 2) was prepared by free radical polymerization of the monomers, exhibiting copolymerization constants r(1) = 0.84 and r(2) = 2.2. Due to multipoint interaction of the copolymer with PVA via monodiols, the intermolecular cross-linking required for seven-fold and 10-fold lower boron concentrations as compared to borate buffers of pH 8.6 and 7.5, respectively. In theological measurements, PVA-copolymer gels exhibited storage moduli (G'(max) comparable to those of PVA-borate gels prepared at 7.5-fold higher boron concentration and the same pH 8.6, what testified to the similar concentration of cross-links in the gels. Therefore, DMAA-NAAPBA copolymer is a more effective cross-linker of PVA than borate. The PVA-copolymer gel exhibited much higher relaxation time (97 s) compared to PVA-borate gels (less than or equal to20 s) indicating a longer lifetime of junction zones. The 'shape stability, of the gel is suggested to originate in the structure of junctions, containing several boronate-diol complexes, between the macromolecules of PVA and the copolymer. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Boronate, Poly(vinyl alcohol), Rheological behaviour NAAPBA, N-acryloyl-m-phenylboronic acid, DMAA, N-dimethylacrylamide, PVA, poly(vinyl alcohol)
in
Polymer
volume
45
issue
8
pages
2495 - 2505
publisher
Elsevier
external identifiers
  • wos:000220533500004
  • scopus:1642356715
ISSN
0032-3861
DOI
10.1016/j.polymer.2004.02.022
language
English
LU publication?
yes
id
cfff6c97-b719-4981-9f30-56ca45e1d976 (old id 140708)
date added to LUP
2007-07-02 11:38:17
date last changed
2017-04-02 04:03:43
@article{cfff6c97-b719-4981-9f30-56ca45e1d976,
  abstract     = {Cross-linking of polyvinylalcohol (PVA) by boronate-containing copolymer of N,N-dimethylacrylamide (DMAA, 1) was studied and compared to cross-linking of PVA by borate buffers in weakly alkaline solutions. The copolymer of M-w = 19,000 g mor(-1) containing 9 mol% N-acryloyl-m-aminophenylboronic acid (NAAPBA, 2) was prepared by free radical polymerization of the monomers, exhibiting copolymerization constants r(1) = 0.84 and r(2) = 2.2. Due to multipoint interaction of the copolymer with PVA via monodiols, the intermolecular cross-linking required for seven-fold and 10-fold lower boron concentrations as compared to borate buffers of pH 8.6 and 7.5, respectively. In theological measurements, PVA-copolymer gels exhibited storage moduli (G'(max) comparable to those of PVA-borate gels prepared at 7.5-fold higher boron concentration and the same pH 8.6, what testified to the similar concentration of cross-links in the gels. Therefore, DMAA-NAAPBA copolymer is a more effective cross-linker of PVA than borate. The PVA-copolymer gel exhibited much higher relaxation time (97 s) compared to PVA-borate gels (less than or equal to20 s) indicating a longer lifetime of junction zones. The 'shape stability, of the gel is suggested to originate in the structure of junctions, containing several boronate-diol complexes, between the macromolecules of PVA and the copolymer. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Ivanov, Alexander and Larsson, Helena and Galaev, Igor and Mattiasson, Bo},
  issn         = {0032-3861},
  keyword      = {Boronate,Poly(vinyl alcohol),Rheological behaviour
NAAPBA,N-acryloyl-m-phenylboronic acid,DMAA,N-dimethylacrylamide,PVA,poly(vinyl alcohol)},
  language     = {eng},
  number       = {8},
  pages        = {2495--2505},
  publisher    = {Elsevier},
  series       = {Polymer},
  title        = {Synthesis of boronate-contaming copolymers of N,N-dimethylacrylamide, their interaction with poly(vinyl alcohol) and rheological behaviour of the gels},
  url          = {http://dx.doi.org/10.1016/j.polymer.2004.02.022},
  volume       = {45},
  year         = {2004},
}