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Heterobifunctional poly(ethylene oxide) oligomers containing carboxylic acids
M L Vadala1, M S Thompson, M A Ashworth
1Department of Chemistry and the Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Mail Code 0212, Blacksburg, Virginia 24061-5976, USA.
Biomacromolecules
|February 6, 2008
Summary
Novel vinylsilyl alcohols initiate ethylene oxide polymerization, yielding functional poly(ethylene oxide) oligomers. These can be further modified for potential use with nanoparticles.
Area of Science:
- Polymer Chemistry
- Materials Science
- Organic Synthesis
Background:
- Developing functional polymers for advanced applications is crucial.
- Controlled synthesis of poly(ethylene oxide) with specific end-groups is needed.
Purpose of the Study:
- To synthesize vinylsilyl alcohols as initiators.
- To prepare functionalized poly(ethylene oxide) oligomers.
- To explore potential applications in nanoparticle complexation.
Main Methods:
- Synthesis of vinylsilyl alcohols with 1-3 vinyl groups.
- Base-catalyzed ring-opening polymerization of ethylene oxide.
- 1H NMR and gel permeation chromatography for characterization.
- Ene-thiol addition for carboxylic acid functionalization.
Main Results:
- Vinylsilyl alcohols successfully initiated ethylene oxide polymerization.
- Poly(ethylene oxide) oligomers with vinylsilane and hydroxyl termini were synthesized.
- Molecular weights closely matched targeted values.
- Carboxylic acid functionalization was achieved via ene-thiol addition.
Conclusions:
- Vinylsilyl alcohols are effective initiators for poly(ethylene oxide) synthesis.
- Functionalized oligomers can be prepared for further conjugation.
- Potential for creating aqueous-dispersible magnetite nanoparticle complexes.
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