Synthesis and Characterization of Crosslinked Hyperbranched Polyglycidol Hydrogel Films

Preparation of Polyglycidol/SiO2 Hybrid Films with Triethoxysilyl-Capped Poly(ethylene glycol)

“…Hyperbranched PGLD was synthesized via direct anion ring-opening polymerization of unprotected glycidol, confirmed by 1 H NMR spectroscope in our pre- vious work. 13,14 The resultant PGLD was a transparent and light yellow syrup; its average molecular weight (M n ) and polydispersity as determined by GPC were 1161 and 1.81, respectively. The triethoxysilyl-capped PEG (PEG-silane), used as a crosslinkilng agent, was obtained by reacting PEG with 3-isocyanatepropyl triethoxysilane at 60 C for 12 h; this was confirmed by the 1 H NMR spectrum.…”

“…These values of gel fractions are higher than those of pure PGLD films as noted in previous work. 13,14 That suggested that PGLD and PEG-silane were completely and strongly crosslinked in comparison to pure PEG and glutaric acid. Swelling behavior of hybrid films was investigated via the measurement of mass changes in the samples under static conditions.…”

“…PGLD was synthesized by direct anion ring-opening polymerization of unprotected glycidol according to the following procedure. 13 A two-necked flask was charged under argon with sodium; distilled ethanol y To whom correspondence should be addressed (Tel: +82-51-510-2404, Fax: +82-51-513-7720, E-mail: leejo@pusan.ac.kr).…”

“…They also possess potential applications in biodegradability, and food additives. 2,3,12 Therefore, we have investigated the routes of synthesis and properties of PGLD hydrogel films prepared using crosslinking agents such as glutaldehyde, several dicarboxylic acids 13 and carboxyl-terminated poly(ethylene glycol) 14 for more applications. The crosslinked PGLD hydrogel films obtained from our previous work exhibited considerably enhanced mechanical properties while maintaining greater water content.…”

Monte Carlo simulation on kinetic behavior of one-pot hyperbranched polymerization based on AA*+CB2

“…By comparison with dendrimers, the hyperbranched polymer exhibits analogical specificities such as highly branched architecture and multiple functional end-groups with the facile synthetic approaches which allow the production on large quantities. So far, polycondensation approach is still the predominant method accessing hyperbranched polymers, although other branched reactions including the self-condensing vinyl polymerization [10,11], the atom transfer radical polymerization [12,13] and also the ring-opening multibranching polymerization [14,15] are developing quickly. The preferred method to obtain hyperbranched polymers at present is still using a multifunctional monomer AB x (x  2) by stepwise polymerizations.…”