Back to Search
Start Over
Effect of low-temperature physical aging on the dynamic transitions of atactic polystyrene in the glassy state
- Source :
- Journal of Polymer Science, Part B: Polymer Physics, 57(20), 1394-1401. Wiley
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- The local and cooperative dynamics of atactic PS (a- PS) were studied by broadband dielectric relaxation spectroscopy (BDRS) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). The a-PS has been subjected to thermal rejuvenation and subsequent quenching, short-term aging (6 weeks), and long-term aging (1 year) at ambient conditions. Where for the rejuvenated sample only an α- and a γ-relaxation is observed, short-term aging results in an additional β*-relaxation that merges with the α-relaxation at longer aging times. The γ-relaxation is increasing in intensity and activation energy during aging. The α-process shows no spectral changes and shift in the relaxation time upon aging. This may be attributed to a possible erasure of history of the material during the temperature-sweep mode measurement. Fourier transform infrared spectroscopy (FTIR) results suggest that the energetically favorable trans-trans (tt) conformers are increased in population with aging. ispartof: JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS vol:57 issue:20 pages:1394-1401 status: published
- Subjects :
- Materials science
Polymers and Plastics
Annealing (metallurgy)
glassy polymers
amorphous
Population
Analytical chemistry
02 engineering and technology
Activation energy
Dielectric
polystyrene
010402 general chemistry
01 natural sciences
physical ageing
chemistry.chemical_compound
Materials Chemistry
Physical and Theoretical Chemistry
Fourier transform infrared spectroscopy
education
education.field_of_study
atactic polystyrene
021001 nanoscience & nanotechnology
Condensed Matter Physics
molecular dynamics
0104 chemical sciences
Amorphous solid
FT-IR
chemistry
ageing
dielectric properties
Attenuated total reflection
atactic
annealing
Polystyrene
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 10990488 and 08876266
- Volume :
- 57
- Issue :
- 20
- Database :
- OpenAIRE
- Journal :
- Journal of Polymer Science, Part B: Polymer Physics
- Accession number :
- edsair.doi.dedup.....6a60d3802dcb8284bbe22110ac236c20