Stereocomplex Formation in Polylactide Multiarm Stars and Comb Copolymers with Linear and Hyperbranched Multifunctional PEG | Zendy

Geschwind Jeannette | Zendy; Rathi Sahas | Zendy; Tonhauser Christine | Zendy; Schömer Martina | Zendy; Hsu Shaw Ling | Zendy; Coughlin E. Bryan | Zendy; Frey Holger | Zendy

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Stereocomplex Formation in Polylactide Multiarm Stars and Comb Copolymers with Linear and Hyperbranched Multifunctional PEG

Author(s) -

Geschwind Jeannette,

Rathi Sahas,

Tonhauser Christine,

Schömer Martina,

Hsu Shaw Ling,

Coughlin E. Bryan,

Frey Holger

Publication year - 2013

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.201300074

Subject(s) - copolymer , polymer chemistry , materials science , ethylene glycol , polymer , fourier transform infrared spectroscopy , ring opening polymerization , lactide , polymerization , condensation polymer , peg ratio , ethylene oxide , chemical engineering , chemistry , organic chemistry , composite material , finance , economics , engineering

A systematic comparison between graft poly( l‐ lactide) copolymers with different topologies and their ability to form stereocomplexes with poly( D ‐lactide) (PDLA) is performed. Comb and hyperbranched copolymers based on functional poly(ethylene glycol) and poly( l‐ lactide) with molecular weights in the range of 2000–90 000 g mol −1 and moderate molecular weight distributions ( M w / M n = 1.08–1.37) are prepared via the combination of anionic and ring‐opening polymerization. Two “topological isomers,” a linear poly(ethylene oxide)/poly(glycerol) (PEG/PG) copolymer and a branched PEG/PG copolymer are used as backbone polymers. Furthermore, the stereocomplex formation between PDLA and the hyperbranched and comb copolymers containing poly( l‐ lactide) arms is studied. Stereocomplex formation is confirmed by DSC as well as by Fourier transform IR (FTIR) and Raman spectroscopy.

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