Temperature-dependent FTIR spectroscopic and thermoanalytic studies of hydrogen bonding of hydroxyl (phenolic group) terminated hyperbranched aromatic polyesters
作者： Y. Mikhaylova , G. Adam , L. Häussler , K.-J. Eichhorn , B. Voit
DOI: 10.1016/J.MOLSTRUC.2005.11.020
关键词:
摘要: Abstract The formation and modification of inter- intramolecular hydrogen bonds hydroxyl (phenolic group) terminated hyperbranched aromatic polyesters (HBP-OH) have been studied by temperature-dependent Fourier transform infrared (FTIR) spectroscopy. Three ‘heating–annealing–cooling’ (HAC) cycles starting from room temperature to 235 °C were measured. IR spectroscopic results indicate different types bond association. weakening breaking with increasing was observed. Additionally, a curve fitting procedure the carbonyl vibration regions has done gather additional information On basis band shifts changes normalised integral intensity (NIBI) halfwidth (HWB), network proposed. Four interactions regarding (phenolic) groups association detected. Several associated existing within HBP-OH revealed. spectra relative stability formed structures participation ester HBP rigid segments in region. Differential scanning calorimetry (DSC) applied reveal thermal behaviour after first, second third HAC cycle. As expected, backbone structure strongly influences glass transition. Therefore, performed measurements did not show any transition related rearrangements bonded network.
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