caa a22 4500 46322521X CHVBK 20180405153224.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0912-z doi (NATIONALLICENCE)springer-10.1007/s10853-006-0912-z The synthesis, swelling behaviour and rheological properties of chemically crosslinked thermosensitive copolymers based on N -isopropylacrylamide [Elektronische Daten] [Luke Geever, César Mínguez, Declan Devine, Michael Nugent, James Kennedy, John Lyons, Austin Hanley, Sinead Devery, Paul Tomkins, Clement Higginbotham] In this contribution thermosensitive polymer matrices based on N-isopropylacrylamide have been developed. The hydrogels were prepared by photopolymerisation of N-isopropylacrylamide and 1-vinyl-2-pyrrolidinone in appropriate amounts of distilled water. The monomers were cured using a UV-light sensitive initiator called 1-hydroxycyclohexylphenylketone. These copolymers were crosslinked using ethylene glycol dimethacrylate and poly(ethylene glycol) dimethacrylate with molecular weights 600 and 1,000, at 0.1wt% of the total monomer content. The chemical structure of the xerogels was characterised by means of Fourier transform infrared spectroscopy (FTIR) and the transition temperature of the hydrogels was determined using modulated differential scanning calorimetry (MDSC). By altering the feed ratio, hydrogels were synthesised to have lower critical solution temperatures (LCST) around 37°C. This ability to shift the phase transition temperature of the gels provides excellent flexibility in tailoring transitions for specific uses. The samples synthesised with PEG1000DMA crosslinking agents absorbed over 18 times their weight in water, while maintaining good gel integrity thus falling marginally short of being characterised as superabsorbent. Each of the samples showed similar deswelling behaviour at 37°C. Rheological studies showed that increasing the molecular weight of the crosslinking agent caused an increase in hydrogel strength. Springer Science+Business Media, LLC, 2007 Geever Luke Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Mínguez César Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Devine Declan Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Nugent Michael Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Kennedy James Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Lyons John Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Hanley Austin Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Devery Sinead Department of Life and Physical Science, Toxicology Unit, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Tomkins Paul Department of Life and Physical Science, Toxicology Unit, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Higginbotham Clement Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4136-4148 0022-2461 42:12<4136 2007 42 10853 https://doi.org/10.1007/s10853-006-0912-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0912-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Geever Luke Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Mínguez César Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Devine Declan Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Nugent Michael Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Kennedy James Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Lyons John Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Hanley Austin Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Devery Sinead Department of Life and Physical Science, Toxicology Unit, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Tomkins Paul Department of Life and Physical Science, Toxicology Unit, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 700 1- Higginbotham Clement Centre for Biopolymer and Biomolecular Research, Athlone Institute of Technology, Dublin Rd, Athlone, Co., Westmeath, Ireland aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4136-4148 0022-2461 42:12<4136 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer