Dewetting kinetics of thin polymer bilayers: Role of under layer
文献类型：期刊论文
| 作者 | Xu, Lin1; Bandyopadhyay, Dipankar2; Shi, Tongfei3; An, Lijia3; Sharma, Ashutosh1,4; Joo, Sang Woo1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2011-09-01 |
| 卷号 | 52期号:19页码:4345-4354 |
| 关键词 | Polymer Bilayer Dewerting Liquid-liquid Interface |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2011.06.060 |
| 英文摘要 | A combined experimental and computational study is presented to uncover the dewetting kinetics of the PS/PMMA system by changing the film thickness of the PMMA under layer. On the low M(w), PMMA (M(w) = 15 kg/mol) layer, the dewetting velocity of PS film firstly rapidly decreases (regime I), and then becomes almost invariant (regime II) with the increase of the film thickness of the liquid lower layer. Experiments suggest that the transition from regime I to regime II is correlative with the property of the solid substrates. The linear stability analysis of thin bilayers uncovers a bimodal behaviour of the instability under the experimental conditions and changeover of dominant mode of instability from one interface to the other is the major reason behind the switching of regimes. The nonlinear simulations closely mimic the experimental interfacial morphologies and suggest two different pathways of hole growth for regimes I and II under experimental condition. The simulations also indicate that the rapid reduction in the dewetting velocity is because of the increased excursion or penetration of the upper layer into the lower layer near the three phase contact line as the viscous resistance at the more viscous PMMA layer reduces with its increasing thickness. A qualitative match is thus found between the experimental and theoretical trends of the dewetting velocities. In addition, the experiments show that on a high M(w) PMMA (M(w) = 365 kg/mol) layer, the kinetics of hole growth of the PS layer is not affected by the PMMA layer thickness. (C) 2011 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000294796300021 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/72407]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Sharma, Ashutosh |
| 作者单位 | 1.Yeungnam Univ, Sch Mech Engn, Gyongsan 712749, South Korea 2.Indian Inst Technol, Dept Chem Engn, Gauhati 781039, India 3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 4.Indian Inst Technol, Dept Chem Engn, Kanpur 208016, Uttar Pradesh, India |
| 推荐引用方式 GB/T 7714 | Xu, Lin,Bandyopadhyay, Dipankar,Shi, Tongfei,et al. Dewetting kinetics of thin polymer bilayers: Role of under layer[J]. POLYMER,2011,52(19):4345-4354. |
| APA | Xu, Lin,Bandyopadhyay, Dipankar,Shi, Tongfei,An, Lijia,Sharma, Ashutosh,&Joo, Sang Woo.(2011).Dewetting kinetics of thin polymer bilayers: Role of under layer.POLYMER,52(19),4345-4354. |
| MLA | Xu, Lin,et al."Dewetting kinetics of thin polymer bilayers: Role of under layer".POLYMER 52.19(2011):4345-4354. |
入库方式： OAI收割
来源：化学研究所
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