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Analysis of the hydrogen bonding in (2‐hydroxypropyl)cellulose‐poly(acrylic acid) composites by Raman spectroscopy
Author(s) -
Kozanecki Marcin,
Ulański Jacek,
Wojciechowski Piotr,
Kryszewski Marian,
Boudeulle Micheline,
Duval Eugen
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991410117
Subject(s) - acrylic acid , hydrogen bond , materials science , polymer chemistry , raman spectroscopy , cellulose , supramolecular chemistry , macromolecule , polymer , polymerization , hydroxypropyl cellulose , chemical engineering , composite material , chemistry , molecule , organic chemistry , copolymer , biochemistry , physics , optics , engineering
Novel anisotropic polymer composites obtained by the photopolymerisation of acrylic acid (AA) in lyotropic solutions of (2‐hydroxypropyl)cellulose (HPC) were investigated. Raman spectroscopy was used in the study of hydrogen bonding formed by carboxylic groups of poly(acrylic acid) (pAA) between themselves and with the hydroxyl groups of HPC macromolecules. These investigations show that the supramolecular structure of pAA obtained by photopolymerisation contains mainly inner oligomeric forms and cyclic dimer forms, as a consequence of the “matrix polymerisation” of AA. The presence of HPC affects the process of the photopolymerisation of AA, by a redistribution of hydrogen bonding within the system, leading to a different supramolecular structure of pAA. With increasing amounts of HPC the inner oligomeric forms characteristic of bulk pAA disappear. In the composites, the pAA chains probably form the terminal oligomeric structure, with some free COOH groups, as well as hydrogen bonds with HPC.