Morphology of polymer/clay latex particles synthesized by miniemulsion polymerization: Modeling and experimental results
Résumé
BA/MMA (90:10 wt.-%) were copolymerized in the presence of two different organomodified clays (C30B and CMA16) and 1.6-2.6wbm.-% surfactants. The effect of the compatibility of the organoclay in the monomer mixture on the morphology of hybrid polymer/clay particles was determined using TEM. The resulting morphologies were compared with the prediction of a Monte-Carlo simulation that determined the equilibrium morphology of monomer/clay hybrid miniemulsion droplets. The model predicted encapsulated morphologies only when the organoclay presented low clay/monomer and high clay/water interfacial tensions. C30B and CMA16 did not fulfill these conditions and provided a preferential surface location of the platelets on the polymer/water interphase as predicted by the model. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Mots clés
- Montmorillonites
- Equilibrium morphology
- Interfacial tensions
- Latex particles
- Mini-emulsion polymerization
- Miniemulsion droplets
- Miniemulsions
- Monomer mixtures
- Monte Carlo Simulation
- Surface location
- Organomodified clay
- Morphology
- Surface active agents
- Silicate minerals
- Polymers
- Organoclay
- Emulsions
- Clay minerals
- TEM