Macromonomers as Well-defined Building Blocks in the Synthesis of Hybrid Octafunctional Star-shaped Poly(ethylene oxide)s or Cross-linked Materials

Pozza, Gladys; Harris, Hassan; Barthel, Markus J.; J\", ; urgen Vitz, ; Schubert, Ulrich S.; Lutz, Pierre J.

Abstract:

The present work addresses the synthesis and the molecular and structural characterization of soluble macromolecular architectures based on functional poly(ethylene oxide) (PEO)s and octafunctional silsesquioxanes. The synthesis of a series of functional PEOs by deactivation, decorated with allyl groups at one chain-end, was considered first. PEO star-shaped polymers were prepared by coupling via hydrosilylation of ω-allyl PEOs with octakis(hydridodimethylsiloxy)octasilsesquioxane (HMe2SiOSiO1.5)8 (Q8M8H), in the presence of a “Speier” catalyst. The products were characterized by SEC, 1H NMR spectroscopy, light scattering, and MALDI–TOF MS to determine the molar masses and degree of functionalization. The star-shaped PEOs (Q8M8PEO) could be isolated from the raw reaction product and characterized. A functionalization close to the theoretical value was obtained.

Year:

2012

Type of Publication:

Article

Keywords:

macromonomers; poly ethylene oxide; star-shaped polymers; synthesis; telomers

Journal:

Macromolecular Chemistry and Physics

Volume:

213

Pages:

2181 - 2191