Poly(vinylalcohol) ferrogels from chemical crosslinking and freezing-thawing

JIMENA GONZÁLEZ; CRISTINA HOPPE; VERA ALVAREZ

Madrid

Congreso; 6th International ECNP Conference on Nanostructured Polymers and Nanocomposites; 2009

It can be observed that FG; H2O and NP were higher for chemically crosslinked ferrogels due to the effect of crosslinking agent. In the case of chemically crosslinked ferrogels, both Tm (related with higher crystals size) and the degree of crystallinity, X (due to the nucleating effect of NPs) were increased when NPs were incorporated to the ferrogel. In the case of F-T the opposite behavior was observed, this could be related with the fact that higher particle-concentration zones surrounding water may be acting as obstacles for polymer chains crystallization process. In addition, the thermal stability of neat hydrogels were improved by NPs incorporation as a results of polymer-particles interaction