Academic Journals Database
Disseminating quality controlled scientific knowledge

Bentonite, stabilizer for suspension polymerisation

ADD TO MY LIST
 
Author(s): S. KOSEVA | S. BREZOVSKA | V. BOSEVSKA | D. BUREVSKI

Journal: Journal of the Serbian Chemical Society
ISSN 0352-5139

Volume: 68;
Issue: 8-9;
Start page: 629;
Date: 2003;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: bentonite | stabilization | polymerization | surface pressure | acidic surface

ABSTRACT
In suspension polymerizations, stabilizers play a crucial role in the particle formation. An effective stabilizer must be able to maintain complete coverage of the surface by both physical and/or anchoring adsorption. In this work the possibility of using original bentonite and bentonite with a high percentage of montmorillonite, their acid-activated and monocationic forms as mixed stabilizer has been investigated. Styrene was used as the monomer. Beads of polystyrene with spherical or elliptical shape were obtained, depending on form of the used bentonite. The results are discussed in terms of the acidity of the mineral surface, amphiphilic characteristic of the clay and the change of the contact angle between organic / water / mineral phase.
Save time & money - Smart Internet Solutions     

Tango Rapperswil
Tango Rapperswil