Premium
Electrical polarization effects on LDPE morphology
Author(s) -
Robert R.,
de Souza G. P.,
Juraitis K. R.,
Akcelrud L.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.13072
Subject(s) - low density polyethylene , materials science , amorphous solid , polarization (electrochemistry) , dynamic mechanical analysis , composite material , polyethylene , electric field , thermal , phase (matter) , thermal analysis , polymer chemistry , polymer , crystallography , chemistry , thermodynamics , physics , organic chemistry , quantum mechanics
The thermal and dynamic mechanical behavior of polarized low‐density polyethylene (LDPE) was investigated, by applying electric fields in the range of 5.37 to 31.7 MV/m, for 2.75 to 43.5 h. The polarization strongly affected DSC and DMA spectra, indicating that a new and more ordered phase is formed, which disappears gradually after the removal of the electrical field. A shift of −21.3°C was found in the DMTA spectra for the T g of the polarized material, and no changes could be found in comparing the results of WAXS analyses of the original and treated materials. Very similar effects were observed with mechanical loading of the materials, leading to the conclusion that the amorphous phase of LDPE might be orienting under high electric fields in a similar manner. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3107–3114, 2003