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Preparation and Characterization of Interpenetrating Polymer Hydrogels Based on Poly(acrylic acid) and Poly(vinyl alcohol)
Author(s) -
Hernández Rebeca,
López Daniel,
Pérez Ernesto,
Mijangos Carmen
Publication year - 2005
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.200550420
Subject(s) - vinyl alcohol , self healing hydrogels , acrylic acid , polymer chemistry , copolymer , materials science , swelling , aqueous solution , polymer , chemical engineering , chemistry , organic chemistry , composite material , engineering
Interpenetrating polymer hydrogels (IPHs) of Poly (vinyl alcohol) (PVA) and Poly (acrylic acid) (PAAc) have been prepared by a sequential method: crosslinked PAAc chains were formed in aqueous solution by crosslinking copolymerization of acrylic acid and N, N′‐methylenebisacrylamide in the presence of PVA. The application of freezing‐thawing cycles (F‐T cycles) leads to the formation of a PVA hydrogel within the synthesized PAAc hydrogel. The swelling and the viscoelastic properties of the prepared IPHs were evaluated on the basis of the structural features obtained from solid state 13 C‐NMR spectroscopy.