Coupling of Microphase Separation and Dewetting in Weakly Segregated Diblock Co-polymer Ultrathin Films
文献类型：期刊论文
| 作者 | Yan DR ; Huang HY ; He TB ; Zhang FJ |
| 刊名 | langmuir
 |
| 出版日期 | 2011 |
| 卷号 | 27期号:19页码:11973-11980 |
| 关键词 | THIN POLYMER-FILMS ORDER-DISORDER TRANSITION PATTERN-FORMATION BLOCK-COPOLYMERS LIQUID-FILMS CRYSTALLIZATION SURFACES MELTS INSTABILITIES NUCLEATION |
| ISSN号 | 0743-7463 |
| 通讯作者 | he tb |
| 中文摘要 | we have studied the coupling behavior of microphase separation and autophobic dewetting in weakly segregated poly(e-caprolactone)-block-poly(l-lactide) (pcl-b-plla) diblock co-polymer ultrathin films on carbon-coated mica substrates. at temperatures higher than the melting point of the plla block, the copolymer forms a lamellar structure in bulk with a long period of l similar to 20 nm, as determined using small-angle x-ray scattering. the relaxation procedure of ultrathin films with an initial film thickness of h = 10 nm during annealing has been followed by atomic force microscopy (afm). in the experimental temperature range (100-140 degrees c), the co-polymer dewets to an ultrathin film of itself at about 5 nm because of the strong attraction of both blocks with the substrate. moreover, the dewetting velocity increases with decreasing annealing temperatures. this novel dewetting kinetics can be explained by a competition effect of the composition fluctuation driven by the microphase separation with the dominated dewetting process during the early stage of the annealing process. while dewetting dominates the relaxation procedure and leads to the rupture of the ultrathin films, the composition fluctuation induced by the microphase separation attempts to stabilize them because of the matching of h to the long period (h similar to 1/2l). the temperature dependence of these two processes leads to this novel relaxation kinetics of co-polymer thin films. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295187300033 |
| 公开日期 | 2012-06-08 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/44300]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yan DR,Huang HY,He TB,et al. Coupling of Microphase Separation and Dewetting in Weakly Segregated Diblock Co-polymer Ultrathin Films[J]. langmuir,2011,27(19):11973-11980. |
| APA | Yan DR,Huang HY,He TB,&Zhang FJ.(2011).Coupling of Microphase Separation and Dewetting in Weakly Segregated Diblock Co-polymer Ultrathin Films.langmuir,27(19),11973-11980. |
| MLA | Yan DR,et al."Coupling of Microphase Separation and Dewetting in Weakly Segregated Diblock Co-polymer Ultrathin Films".langmuir 27.19(2011):11973-11980. |
入库方式： OAI收割
来源：长春应用化学研究所
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