title: Hetero-Multifunctional Poly(ethylene glycol) Copolymers with Multiple Hydroxyl Groups and a Single Terminal Functionality.
abstract: Hetero-multifunctional poly(ethylene glycol-co-glycerol) random copolymers with multiple hydroxyl functionalities and a single terminal functionality have been prepared by copolymerization of ethylene oxide (EO) and ethoxy ethyl glycidyl ether (EEGE) with the use of a suitable initiator, introducing a protected amino group or a double bond, respectively. Acidic deprotection was used for removal of the acetal protecting groups in the chain, and the terminal amino group was regenerated by catalytic hydrogenation. A series of copolymers with narrow polydispersity was obtained, varying comonomer fractions from 3 to 67% and molecular weights in the range of 5 000-32 000 g · mol(-1) (1.05 < $\overline M _{\rm w} /\overline M _{\rm n}$ < 1.25). Molecular and thermal characterization was carried out using (1) H- and (13) C NMR, SEC and differential scanning calorimetry (DSC).
authors: Institute of Organic Chemistry, Johannes-Gutenberg University Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany.
authors: Christine
authors: C
authors: Mangold
authors: Frederik
authors: F
authors: Wurm
authors: Boris
authors: B
authors: Obermeier
authors: Holger
authors: H
authors: Frey