Structure Evolution in Layers of Polymer Blend Nanoparticles
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- 作者：Joanna Raczkowska ; Rivelino Montenegro ; Andrzej Budkowski ; Katharina Landfester ; Andrzej Bernasik ; Jakub Rysz ; Pawe
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- 刊名：Langmuir
- 出版年：2007
- 出版时间：June 19, 2007
- 年：2007
- 卷：23
- 期：13
- 页码：7235 - 7240
- 全文大小：503K
- 年卷期：v.23,no.13(June 19, 2007)
- ISSN：1520-5827
文摘
The early stages of phase evolution, not available for nanometer polymer blend films spin-cast from solutions ofincompatible mixtures, have been examined for films prepared from nanoparticles of deuterated polystyrene/ poly(methyl methacrylate) blends (1:1 mass fraction of dPS/PMMA) with PS-PMMA diblock copolymer additives. Theinitial phase arrangement, confined to the size of nanoparticles, has provided the homogeneity of the initial filmcomposition. The early stages of structure formation, promoted by annealing and traced with atomic and lateral forcemicroscopy (AFM, LFM) as well as secondary ion mass spectroscopy (SIMS), resulted in bilayers, observed commonlyfor as-prepared solvent-cast blends. The initiated capillary instability of the upper dPS-rich layer depended on copolymeradditives, which enhanced the lateral structures pinning the dewetting process.