Dielectric studies of molecular mobility and microphase separation in segmented polyurethanes
โ Scribed by G Georgoussis; A Kyritsis; P Pissis; Yu.V Savelyev; E.R Akhranovich; E.G Privalko; V.P Privalko
- Book ID
- 108318690
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 207 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0014-3057
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๐ SIMILAR VOLUMES
Ultrasonic and dielectric relaxation measurements are reported as a function of frequency and temperature for a series of segmented ester polyurethanes. Glass transitions for the ester block were determined using a combination of differential scanning calorimetry and dilatometry. The activation ener
The phase-separation process in segmented copolymers is treated by first-order kinetics which couples with the Fox equation to derive an expression for describing the change of soft segment T, with the annealing time. Kinetic data of five commercial polyurethanes have been analyzed. The studies conc