Surface morphology control of immiscible polymer-blend thin films
Li, X; Han, YC; An, LJ
Source PublicationPOLYMER
AbstractThe effects of the molecular weights (molecular weight of polystyrene, M(w,PS), varying from 2.9 to 129 k) on the surface morphologies of spin-coated and annealed polystyrene/poly (methyl methacrylate) (PS/PMMA = 50/50, w/w) blend films were investigated by atomic force microscopy and X-ray photoelectron spectroscopy. For the spin-coated films, when the M(w,PS) varied from 2.9 to 129 k, three different kinds of surface morphologies (a nanophase-separated morphology, a PMMA cellular or network-like morphology whose meshes filled with PS, a sea-island like morphology) were observed and their formation mechanisms are discussed, respectively. Upon annealing, two different morphology-evolution processes were observed. It is found that a upper PS-rich phase layer is formed when M(w,PS) < 4 k, and this behavior is mainly attributed to the low interfacial tension between PS and PMMA component. When M(w,PS) > 4 k, the PS-rich phase forms droplets on top of the PMMA-rich phase layer which wets the SiO(x) substrate. These results indicate that the surface morphology of the polymer blend films can be controlled by the polymer molecular weight and annealing conditions. (C) 2003 Elsevier Ltd. All rights reserved.
KeywordPolystyrene Poly (Methyl Methacrylate) Atomic Force Microscopy
Indexed BySCI
WOS IDWOS:000186949800043
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Document Type期刊论文
Corresponding AuthorHan, YC
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Li, X,Han, YC,An, LJ. Surface morphology control of immiscible polymer-blend thin films[J]. POLYMER,2003,44(26):8155-8165.
APA Li, X,Han, YC,&An, LJ.(2003).Surface morphology control of immiscible polymer-blend thin films.POLYMER,44(26),8155-8165.
MLA Li, X,et al."Surface morphology control of immiscible polymer-blend thin films".POLYMER 44.26(2003):8155-8165.
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