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Authors Thompson, D. ; Wagener, K. B. ; Schulze, U. ; Voit, B. ; Jehnichen, D. ; Malanin, M.
Title Spectroscopic examinations of hydrogen bonding in hydroxy-functionalized ADMET chemistry
Date 01.01.2015
Number 44403
Abstract Wide-angle X-ray scattering (WAXS) and temperature-dependent Fourier transform infrared spectroscopy (FTIR) spectroscopy are used to study hydrogen bonding interactions of a hydroxyl-functionalized polyethylene (PE) prepared by acyclic diene metathesis (ADMET) chemistry. The hydroxyl polymer exhibits an orthorhombic unit cell structure with characteristic reflection planes at (110) and (200), comparable to pure crystalline PE. These data unequivocally demonstrate that the OH branch is excluded from the PE lamellae. Furthermore, the polymer melts 100 °C higher than all previous analogous polymers possessing precision placed long aliphatic branches that also are excluded from PE lamellae. Temperature-dependent FTIR spectroscopy from ambient to 150 °C, followed by cooling to 125 °C supports exclusion of the hydroxyl group from the crystalline lattice. It is concluded that these hydroxyl groups form stable physical networks in the amorphous region via hydrogen bonding and are important for the overall morphology of such polymers.
Publisher Macromolecular Rapid Communications
Identifier
Citation Macromolecular Rapid Communications 36 (2015) 60-64
DOI https://doi.org/10.1002/marc.201400545
Tags admet chemistry fourier transform infrared (ft-ir) hydrogen bonding wide-angle x-ray scattering (waxs) polyethylenes (pe)

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