1 / 1

Background Polymers: Chemical structure made of many repeating units

Selective Olefin Metathesis as an Intra-Chain Cross-linker for Single -Chain Nanoparticle Formation. Kathryn N. Dube , Christopher Lyon, Andrea Duke, Dr. Erik Berda Chemistry Department, University of New Hampshire, 23 Academic Way, Parsons Hall, Durham, NH 03824. knp6@unh.edu. Background

ramona
Download Presentation

Background Polymers: Chemical structure made of many repeating units

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Selective Olefin Metathesis as an Intra-Chain Cross-linker for Single-Chain Nanoparticle Formation Kathryn N. Dube, Christopher Lyon, Andrea Duke, Dr. Erik Berda Chemistry Department, University of New Hampshire, 23 Academic Way, Parsons Hall, Durham, NH 03824. knp6@unh.edu • Background • Polymers: • Chemical structure made of many repeating units • Form many different structures: • Nanomaterials: • Materials that are less than 100 nm in size4 • Further classified by shape: • Nanofibers, nanotubes, nanoparticles, nanodots • RAFT • Reversible addition-fragmentation chain transfer polymerization • Mechanism3: Current Work Reaction Schemes1,2: NMR Spectra: • Future Work • Modifications to Current Work: • Investigate new solvent systems • Revisit monomer ratios, as well as monomer to initiator and monomer to chain transfer agent ratios • Investigate cross-linking units like divinylbenzene: • Cross-linking to Form Nanoparticles: • Reversible or irreversible • Covalent or ionic • Inter-chain or intra-chain • Decreases fluidity • Increases surface area to volume ratio5 Ortho-, para- and methyl-divinylbenzene 1H NMR of pre-functionalized poly(HEMA-co-MMA) in CDCl3 Formation of particle by intra-chain crosslinking. 1H NMR of post-functionalized poly(HEMA-co-MMA) in DMSO-D6 References: 1 Chiefari, J.; et. al.; Macromolecules, 1998, 31, 5559. 2 Cuervo-Rodriguez, R.; Bordege, V.; Sanchez-Chaves, M.; Fernandez-Garcia, M.; Jour. Polym. Sci., Part A, Polym. Chem.,2006, 44, 5618. 3 Gregory, A.; Stenzel, M. H.; Prog. Poly. Chem., 2012, 37, 38.4 Nanomaterials. http://ec.europa.eu/environment/chemicals/nanotech/. (April 23, 2013). 5 Zhang, K.; Fang, H.; Shen, G.; Talyor, J. A.; Wooley, K.; Ann. Am. Thorac. Soc., 2009, 6, 450 Acknowledgements: I would like to thank the my advisor, Dr. Erik Berda, as well as Chris Lyon and Andrea Duke for their help on this project. I would also like the rest of the research group for their help and support throughout this project.

More Related