Macromonomers as Well-Defined Building Blocks in the Synthesis of Hybrid Octafunctional Star-Shaped Poly(ethylene oxide)s

作者：Pozza Gladys M E; Harris Hassan; Barthel Markus J; Vitz Juergen; Schubert Ulrich S^*; Lutz Pierre J

来源：Macromolecular Chemistry and Physics, 2012, 213(20): 2181-2191.

DOI：10.1002/macp.201200292

• macromonomers
• poly(ethylene oxide)
• star-shaped polymers
• synthesis
• telomers

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 ?-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 MALDITOF 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.

• 出版日期2012-10-26