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Thermomorphological study of the terahertz lattice modes in polyvinylidene fluoride and high-density polyethylene

Title data

Wietzke, Steffen ; Jansen, Christian ; Reuter, Marco ; Jung, Tilmann ; Hehl, Judith ; Kraft, Dietmar ; Chatterjee, Sangam ; Greiner, Andreas ; Koch, Martin:
Thermomorphological study of the terahertz lattice modes in polyvinylidene fluoride and high-density polyethylene.
In: Applied Physics Letters. Vol. 97 (12 July 2010) Issue 2 . - 022901.
ISSN 1077-3118
DOI: https://doi.org/10.1063/1.3462312

Official URL: Volltext

Abstract in another language

Semicrystalline polymers possess a complex morphology comprising both crystalline and amorphous domains. We investigate two representatives from this group, polyvinylidene fluoride and high-density polyethylene, with terahertz time-domain spectroscopy. Intriguingly, the thermal gradient of lattice modes arising from the crystalline phase changes at the glass transition. Thus, terahertz spectroscopy can identify the glass transition temperature T(g) even in highly crystalline polymers, where conventional methods such as differential scanning calorimetry fail. Furthermore, these findings provide experimental evidence of the strong interactions between the amorphous and the crystalline domains, as the glass transition is an exclusive feature of the mobile amorphous fraction. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3462312]

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: TIME-DOMAIN SPECTROSCOPY; GLASS-TRANSITION; POLY(VINYLIDENE FLUORIDE); INFRARED-ABSORPTION; FORM II; TEMPERATURE; CRYSTALLINE; VIBRATIONS; FREQUENCY; POLYMERS
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 01 Apr 2015 09:45
Last Modified: 01 Apr 2015 09:45
URI: https://eref.uni-bayreuth.de/id/eprint/9558