期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 211, 期 1, 页码 35-44出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200900377
关键词
hyperbranched; dendrimers; matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS); poly(ethylene oxide); star polymers
资金
- Fonds der Chemischen Industrie
- SFB 625
- 'POLYMAT'
- graduate school of excellence MAINZ
Multiarm PEO star polymers with a purely aliphatic polyether structure have been synthesized using hyperbranched polyglycerol (PG) with different molecular weights as a multifunctional initiator. Different degrees of deprotonation of the initiator were studied with respect to molecular weight control. The results show that the degree of deprotonation is a crucial parameter for the synthesis of well-defined polymers with controlled molecular weights. Partial deprotonation of the PIG hydroxyl groups (5-8%) was proven to represent an optimum for the synthesis of star polymers with molecular masses close to the theoretical values. Molecular weights of the stars ranged between 9 000 and 30 000 g . mol(-1). MALDI-ToF spectra confirmed that the PEO arms in the star polymers possess homogeneous lengths.
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