Abstract
The effects of the concentration of polyoxyethylene octylphenyl ether (OP-10) as a nonionic surfactant and the molecular weight of polymers (polystyrene (PS) and poly(methyl methacrylate) (PMMA)) on the morphology of anisotropic PS/PMMA composite particles were investigated. In the case of polymers with lower molecular weight (M w ≈ 6.0 × 104 g/mol), the PS/PMMA composite particles have dimple, via acorn, to hemispherical shapes along with the increase of the OP-10 concentration. On the other hand, when the polymers have higher molecular weight (M w ≈ 3.3 × 105 g/mol), the morphology of PS/PMMA composite particles changed from dimple, via hemispherical, to snowman-like structure while the concentration of OP-10 was increased. Furthermore, thermodynamic analysis was first simply made by spreading coefficients, and the results indicated that both the concentration of OP-10 aqueous solution and the molecular weight of polymers were very important to the final morphology of anisotropic composite particles.
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The authors gratefully acknowledge the National Natural Science Foundation of China (nos. 50573070 and 50773073) and Program for Changjiang Scholars and Innovative Research Team in University for the support of this work.
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Ge, X., Wang, M., Ji, X. et al. Effects of concentration of nonionic surfactant and molecular weight of polymers on the morphology of anisotropic polystyrene/poly(methyl methacrylate) composite particles prepared by solvent evaporation method. Colloid Polym Sci 287, 819–827 (2009). https://doi.org/10.1007/s00396-009-2036-x
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DOI: https://doi.org/10.1007/s00396-009-2036-x