Title :
Thermal and morphological influence on the B1u lattice mode in polyethylene observed using terahertz time-domain spectroscopy
Author :
Wietzke, S. ; Jung, T. ; Chatterjee, S. ; Dempwolf, W. ; Menzel, H. ; Koch, M.
Author_Institution :
Inst. fur Hochfrequenztech., Tech. Univ. Braunschweig, Braunschweig, Germany
Abstract :
Decreasing the temperature leads to a blue shift of the B1u lattice mode in different types of polyethylene, which can be observed using terahertz time-domain spectroscopy. Moreover, the frequency shift reveals the glass transition of high-density polyethylene due to the semi-crystalline nature in this polymer. In addition, morphological factors on the B1u lattice mode of LDPE, LLDPE, and HDPE are discussed.
Keywords :
glass transition; polymers; spectral line shift; terahertz wave spectra; thermodynamics; vibrational modes; B1u lattice mode; HDPE; LDPE; LLDPE; blue shift; frequency shift; glass transition; high-density polyethylene; morphological factor; terahertz time-domain spectroscopy; thermal influence; thermodynamic phase; Absorption; Amorphous materials; Crystallization; Frequency; Lattices; Polyethylene; Polymers; Spectroscopy; Temperature; Thickness measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324905
