Mballa Mballa, M. A.; Heuts, J. P. A.; Herk, A. M., The effect of clay on the morphology of multiphase latex particles. Colloid and Polymer Science 2013, 291 (6), 1419-1427. DOI:10.1007/s00396-012-2877-6
Abstract:
The effect of montmorrilonite clay (MMT) platelets on the morphology of polystyrene/poly(methyl methacrylate) (PMMA) composite latex particles prepared via PMMA-seeded (semi-) batch emulsion polymerization of styrene was studied. It was found that the particle morphology obtained greatly depended on the ability of the clay platelets to diffuse through the polymer particle. Indeed, when the reactions were strictly under kinetic control, i.e., where the clay platelets were unable to diffuse during polymerization, anisotropic core-shell-like morphologies with split core were observed. A better mobility of the clay platelets could more or less restrict the diffusion of the second-stage polymers within the host polymer, leading to original kinetically controlled morphologies. In the case of a full migration of the clay platelets to the particle surface, the penetration of the second-stage polymer species in the seed latex was found to be more limited, enhancing the formation of secondary particles.
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Funding Info:
There was no specific funding for the research done
Description:
This is a post-peer-review, pre-copyedit version of an article published in Colloid and Polymer Science. The final authenticated version is available online at: https://doi.org/10.1007/s00396-012-2877-6.