Hyperbranched polyesters: Synthesis, characterization, and molecular simulations

Kishore K. Jena, K. V.S.N. Raju, B. Prathab, Tejraj M. Aminabhavi

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    68 Scopus citations

    Abstract

    New types of hyperbranched polyesters were synthesized by the reaction of 2,2-bis(hydroxymethyl) propionic acid as an AB2-type monomer with pentaerydiritol, trimemylol propane, or glycerol as the core moiety. The obtained globular networks were characterized by NMR and MALDI-TOF specttoscopic techniques. Molecular weights determined by MALDI-TOF were confirmed by gel permeation chromatography. Fourier transform infrared (FTIR) spectroscopy was used for the quantitative evaluation of hydrogen bonding as well as to study the structure-property relationship. To investigate the changes and types of intermolecular H-bonding interactions in hyperbranched polyesters with a variation in molecular structure, the deconvolution of FTIR spectra was carried out using Origin 6.0 software through the Gaussian curve-fitting method. Molecular simulations were performed through molecular mechanics and molecular dynamics (MD) calculations using the DISCOVER module. Cohesive energy density, solubility parameters, and surface properties of the hyperbranched polyesters were calculated. Further, vibrational analysis was computed using MD simulations for all the hyperbranched polyesters developed in this work.

    Original languageBritish English
    Pages (from-to)8801-8811
    Number of pages11
    JournalJournal of Physical Chemistry B
    Volume111
    Issue number30
    DOIs
    StatePublished - 2 Aug 2007

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