Thermal restraint on PEG-EG mixtures by FTIR investigations and wavelet cross-correlation analysis |
| |
| Institution: | 1. Department of Mathematical and Informatics Sciences, Physical Sciences and Earth Sciences of Messina University, Viale Ferdinando Stagno D'' Alcontres 31, 98166 Messina, Italy;2. Le Studium, Loire Valley Institute for Advanced Studies, Orléans & Tours, France;3. Centre de Biophysique Moleculaire (CBM)-CNRS UPR 4301 du CNRS, rue Charles Sadron, 45071 Orleans CEDEX 2, France;4. Laboratoire Interfaces, Confinement, Matériaux et Nanostructures (ICMN) - UMR 7374 CNRS - Université d’Orléans, 1b rue de la Férollerie, CS 40059, 45071 Orléans cedex 2, France;1. College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and System of Ministry Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China;1. CIMJECT Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil;2. Biomechanics Engineering Laboratory, University Hospital (HU), Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil;3. Dipartimento di Chimica, Materiali ed Ingegneria Chimica “G. Natta”, Politecnico di Milano, Edificio 6, Piazza L. da Vinci 32, 20133 Milano, Italy;1. School of Mechanical, Aerospace and Civil Engineering, United Kingdom;2. North West Composites Centre, School of Materials, The University of Manchester, Manchester M13 9PL, United Kingdom;1. Technische Universität Dresden, Institut für Leichtbau und Kunststofftechnik, 01062 Dresden, Germany;2. Technische Universität Dresden, Institut für Magnetofluiddynamik, Mess- und Automatisierungstechnik, 01062 Dresden, Germany;3. Anton Paar GmbH, Ostfildern-Scharnhausen, 73760, Germany;1. Lodz University of Technology, Institute of Polymer and Dye Technology, Stefanowskiego 12/16, 90924 Lodz, Poland;2. Lodz University of Technology, Institute of General and Ecological Chemistry, Zeromskiego 116, 90-924 Lodz, Poland |
| |
| Abstract: | The aim of the present work is to investigate the thermal response of PolyEthylene Glycol 1000 (PEG1000) and of its mixtures with the monomer Ethylene Glycol (EG). On purpose Attenuated Total Reflectance Infra-Red (ATR-IR) spectra were collected, in the spectral range spanning from 400 cm−1 to 4000 cm−1, on PEG1000 and on its mixtures with EG, as a function of concentration and temperature, through positive thermal scans, i.e. by increasing temperature. It will be shown that ATR-IR technique reveals a powerful tool for the characterization of the thermal response in polymeric systems. The registered spectra have been analyzed both on the whole investigated spectral range, as well as, separately, on the restricted intramolecular OH stretching vibrational contribution region. In the first case the displacement of the spectral features from the spectrum at the lowest temperature, taken as reference spectrum, shows a lower dependence for the mixture. As far as the intramolecular OH vibrational contribution is concerned, besides a conventional analysis in terms of band components, three different data analysis procedures have been applied, i.e. the characterization of the temperature dependence of the intramolecular OH stretching center frequency, of the spectral distance and of the wavelet cross correlation coefficient. The three applied data analysis approaches indicates that the addition of a small amount of pure EG to PEG1000 significantly influences the OH vibrational properties of the PEG1000 polymeric matrix. The three different methods furnish a unique coherent interpretative picture which supports the validity of the applied approaches. Furthermore, the analyses show the presence of a higher thermal restraint for the PEG + EG mixture which confirms that, within the three-dimensional networks of hydrogen bonded EG-PEG1000 mixtures, a key role is played by EG in determining an increase of the hydrogen bond network density. |
| |
| Keywords: | Attenuated Total Reflectance Infra-Red spectroscopy PolyEthylene Glycol Ethylene Glycol Spectral distance Thermal restraint Wavelet analysis |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
