| Autor: |
Kurskaya, E. A., Podorozhko, E. A., Afanasyev, E. S., Kononova, E. G., Askadskii, A. A. |
| Předmět: |
|
| Zdroj: |
Polymer Science -- Series A; Feb2022, Vol. 64 Issue 1, p19-37, 19p |
| Abstrakt: |
Different trends observed during cryotropic gelation of 8% poly(vinyl alcohol) aqueous solutions (preheated to 25, 55, and 85°С) at rapid cooling and freezing of the system have been examined. The data of rheology, thermomechanical analysis, attenuated total reflection, and scanning electron microscopy have revealed that the macroporous poly(vinyl alcohol) cryogels formed under above conditions differ in elastoplastic properties, swelling ability in water, degree of microcrystallinity, and pores size. The obtained results have been confirmed by the study of diffusional release of stabilized silver nanoparticles from the cryogels. It has been shown that the macropores walls in the cryogel network consist of spherical formations, likely contacting microgel particles formed during the liquid-phase separation of the polymer solution prior to the cryotropic gelation stage. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink