期刊
COLLOID AND POLYMER SCIENCE
卷 287, 期 7, 页码 819-827出版社
SPRINGER
DOI: 10.1007/s00396-009-2036-x
关键词
Anisotropic PS/PMMA composite particles; Concentration of OP-10; Interfacial tension; Molecular weight; Nonionic surfactant; Spreading coefficients
资金
- National Natural Science Foundation of China [50573070, 50773073]
- Program for Changjiang Scholars and Innovative Research Team in University
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) a parts per thousand aEuro parts per thousand 6.0 x 10(4) 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) a parts per thousand aEuro parts per thousand 3.3 x 10(5) 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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