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Influence of Layered-Silicates on the Phase Separated Morphology of PS



K Yurekli, Alamgir Karim, Eric J. Amis, R Krishnamoorti


The influence of added nanometer thick layered-silicates on the phase-separated morphology of a near critical blend of PS and PVME was examined. Thin films of the blend with 0.8 vol % of the nanoscale particles were examined by atomic force microscopy as a function of quench depth obtained in a single experiment by applying a temperature gradient combinatorial method. The layered-silicates, depending on their effective disk diameters, influence the development of phase separated structures. For the blends with small disk diameter (30 nm and 0.5 mm) layered-silicates, a pinning of the domain sizes and a concomitant increase in the number of phase separated domains and the presence of a higher fraction of near circular domains are observed. On the other hand, for layered-silicates with large disk diameters (10 mm), the nanoparticles do not to affect the morphology of the phase separated structure and possibly accelerate the phase separation kinetics.
36 No. 19


combinatorial methods, layered silicates, light scattering, neutron scattering, phase separation, polymer blend, thin film


Yurekli, K. , Karim, A. , Amis, E. and Krishnamoorti, R. (2003), Influence of Layered-Silicates on the Phase Separated Morphology of PS, Macromolecules, [online], (Accessed May 26, 2024)


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Created December 31, 2002, Updated October 12, 2021