Abstract
A study was conducted to propose an improved method to obtain direct rheological evidence of monomer density reequilibration for entangled polymer melts. Investigations revealed that all polymers except PS-275K were 1,4-polybutadienes with a very high stereoregularity, given by the low T g around -99 °C. The temperature was controlled between -95 and +100 °C and frequency sweeps were carried out to ensure a shift factor around 100 between the individual temperatures. The relaxation spectra of all samples were calculated using a self-programmed spectrum calculation routine based on determining the spectrum as a spline instead of individual relaxation modes similar to most other calculation routines. This method ensured a very precise calculation of the relaxation spectrum.
| Original language | English |
|---|---|
| Pages (from-to) | 9205-9209 |
| Number of pages | 5 |
| Journal | Macromolecules |
| Volume | 43 |
| Issue number | 21 |
| DOIs | |
| State | Published - 9 Nov 2010 |
| Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry