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Synthesis and Properties of Hydrophilic Networks Based on Poly(ethylene glycol) and β ‐Cyclodextrin
Author(s) -
Cesteros Luis C.,
Ramírez Camilo A.,
Peciña Ainhoa,
Katime Issa
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700109
Subject(s) - molar mass , ethylene glycol , peg ratio , polymer chemistry , cyclodextrin , crystallinity , thermal stability , isocyanate , glass transition , chemistry , self healing hydrogels , swelling , molar ratio , chemical engineering , materials science , polymer , organic chemistry , polyurethane , crystallography , composite material , catalysis , finance , engineering , economics
New hydrophilic networks combining poly(ethylene glycol) (PEG) and β ‐cyclodextrin ( β ‐CD) have been prepared. Both components are linked by reacting PEG chains previously end‐capped with isocyanate groups and β ‐CD, forming urethane links. Networks of molar compositions ( β ‐CD/PEG) ranging from 1/4 to 1/14, and with four different molar masses (400, 600, 900, and 1 350 g · mol −1 ) of the end‐capped PEG precursor have been synthesized. The networks have good thermal stability and low glass transition temperatures. Crystallinity has only been detected for the two higher molar mass PEG precursors. The swelling properties of these hydrogels depend on the chain lengths of the PEG precursor and also on the temperatures.