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De-grafting of polymer chains from surfaces

Genzer Research Group. http://scf.che.ncsu.edu. Tailoring assemblies of surface-anchored polymers by "grafting from" free radical polymerization Jan Genzer , North Carolina State University, DMR 0906572. De-grafting of polymer chains from surfaces. Major findings.

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De-grafting of polymer chains from surfaces

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  1. Genzer Research Group http://scf.che.ncsu.edu Tailoring assemblies of surface-anchored polymers by "grafting from" free radical polymerization Jan Genzer, North Carolina State University, DMR 0906572 De-grafting of polymer chains from surfaces Major findings Polymer grafts attached to surfaces via initiators containing ester linkages de-graft. The degree of de-grafting increases with increasing chain length, increasing charge, and increasing solution pH. ATRP FRP PDMAEMA low pH PDMAEMA pKa=7.5 qPDMAEMA qPDMAEMA

  2. Genzer Research Group http://scf.che.ncsu.edu Tailoring assemblies of surface-anchored polymers by "grafting from" free radical polymerization Jan Genzer, North Carolina State University, DMR 0906572 Broader impact of research, education & outreach Broader Impact of Research Polymer de-grafting from surfaces can lead to under-estimation of chain grafting density. When understood and properly controlled, chain de-grafting can reveal information about degree (and locus) of charging insight polyelectrolyte brushes (difficult to measure otherwise). Broader Impact of Education & Outreach The PI’s group has continued their involvement in summer high school camp (Raleigh, June 2011), Nanodays (Raleigh, July 2011) by preparing lecture series and lab exercises. Five NC State undergraduate students (2 female) have worked in the PI’s lab in summer 2011. Two visiting students from Zheijang University (PR China) are spending 6 weeks in the PI’s lab working on projects involving polymer assembly on surfaces. We host exchange students from Germany and Czech Republic in our lab (1 in spring 2011, 2 in fall 2011)

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