Synthesis of Novel Nanoreinforcements for Polymer Matrices by ATRP: Triblock Poly(rotaxan)s based in Polyethyleneglycol End-Caged with poly (Methyl Methacrylate) Articles uri icon

publication date

  • November 2009

start page

  • 5884

end page

  • 5891

issue

  • 25

volume

  • 50

international standard serial number (ISSN)

  • 0032-3861

electronic international standard serial number (EISSN)

  • 1873-2291

abstract

  • Poly(rotaxan)s of poly(ethylene glycol) and alpha-cyclodextrines (CD) block copolymers end-capped with poly(methyl methacrylate) chains were synthesized by atom transfer radical polymerization. The synthesized copolymers were characterized by H-1 NMR, 2D NOESY NMR, X-ray and Thermogravimetric analysis. Assuming a maximum relation of 2 CDs per ethyleneglycol unit, a coverage degree of 18% and 15% was achieved. X-ray analysis showed a characteristic signal around 20 theta for all copolymers with an amorphous halo mainly due to inter-crystal poly(ethylene glycol) and poly(methyl methacrylate) chains. Full Molecular Dynamics of 20 ns was used to simulate the crystal structure of these copolymers. A pair correlation function was used to determine the coupling between hydrogen atoms of PEG, PMMA and cyclodextrine obtained by 2D NOESY NMR.

keywords

  • Poly(rotaxan)s
    Nanoreinforcement
    Atom transfer radical polymerization