SEMICONTINUOUS EMULSION POLYMERIZATION OF VINYL ACETATE X. KINETICS OF HOMOPOLYMERIZATION,CO POLYMERIZATION,AND INITIATOR DECOMPOSITION IN THE PRESENCE OF SULFOSUCCINATE-TYPE SURFACTANTS |
| |
Authors: | Dan Donescu Liana Fusulan |
| |
Institution: | Center for Plastic Materials Research , 202 Splaiul Independentei, Bucharest, 77208, Romania |
| |
Abstract: | ABSTRACT Miorocrystalline cellulose stabilized emulsions (o/w) were evaluated by means of brightfield and polarized light microscopy, freeze-etch electron microscopy, droplet size analyses and rheologic measurements. These studies indicated that miorocrystalline cellulose (Avicel RC591 ) forms a network around emulsified oil droplets. This structure provides a mechanical barrier at the o/w interface which stabilizes the emulsion without the necessity for decreasing interfacial tension, as in conventional surfactant-stabilized emulsions. Rheologic studies indicated that emulsions containing Avicel RC591 had a considerable degree of thlxotropy which contributed to their stability. When Tween 80 was incorporated in this system, oil droplets coalesced indicating that the stability of the emulsion was affected adversely. |
| |
Keywords: | |
|
|