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Preparation of Poly(methyl methacrylate)/Diamond Nanoparticle Composites via ATRP

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Title
Preparation of Poly(methyl methacrylate)/Diamond Nanoparticle Composites via ATRP
Author
Lim, Jong-Kwan
Advisor
Baek, Jong-Beom
Issue Date
2010-08
Publisher
Graduate school of UNIST
Abstract
Functionalization of diamond nanoparticales (DNPs) was conducted with 4-ethylbenzoic acid (EBA) in a less-destructive mild polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) medium to afford 4-ethylbenzoyl-functionalized DNPs (EBA-g-DNP). Subsequently, the bromination of EBA-g-DNP using N-bromosuccinimide (NBS) yielded ?-brominated EBA-g-DNP (BrEBA-g-DNP), which was used as an initiator for methyl methacrylate (MMA) via atom-transfer radical polymerization (ATRP). Poly(methylmetacrylate) grafted DNP (PMMA-g-DNP)was prepared from the reaction between MMA and BrEBA-g-DNP in the presence of copper(I) bromide in anhydrous N-Methyl-2-pyrrolidone (NMP). The resultant PMMA-g-DNP was characterized by using FT-IR, TGA, 1H NMR, SEM, TEM and etc.TEM images provided clearvisual evidence for the formation of a core?shell structure-a hard DNP core and a soft PMMA shell.
Description
Interdisciplinary School of Green Energy
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