Tethering of Homo and Block Glycopolymer Chains onto Montmorillonite Surface by Atom Transfer Radical Polymerization

Amal Amin, Heba Kandil, Ahmed Ramadan, Mohamed Nader Ismail

Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt.
Polymers & Pigments Department, National Research Center, Giza, Egypt.

DOI: 10.4236/ojopm.2012.24012                

Abstract

Well-defined homo glycopolymer/montmorillonite (MMT) nanocomposite (gly1) was prepared successfully by the “grafting from” technique from the modified surface of MMT via surface initiated atom transfer radical polymerization (SI-ATRP) of 3-O-methacryloyl-1,2:5,6-di-O-isopropylidene-α-D-glucofuranose (gly) in the presence of Cu(I)Br/ bi- pyridyl at 90?C in xylene. Well-defined diblock copolymers (gly2, gly3, gly4 and gly5) were also synthesized via the same technique by using comonomers of methylmethacrylate (MMA) or styrene (St) with glycomonomer (gly) using the same catalytic system. The formed nanocomposites showed both intercalated and exfoliated structures, as judged by XRD and TEM measurements. Further analyses were performed on such nanocomposites to confirm their formation such as TGA and DSC. The structures of the attached polymers to MMT were characterized by 1H NMR.

Keywords

Glycopolymers; Polymer/Layered Silicates Nanocomposites; SI-ATRP; Montmorillonite

Conflicts of Interest

The authors declare no conflicts of interest.

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