Lamella reorientation in thin films of a symmetric poly(L-lactic acid)-block-polystyrene upon crystallization at different temperatures
文献类型：期刊论文
| 作者 | Fu, Jun1; Wei, Yuhan1; Xue, Longjian1; Luan, Bin2; Pan, Caiyuan2; Li, Binyao1; Han, Yanchun1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2009-03-06 |
| 卷号 | 50期号:6页码:1588-1595 |
| 关键词 | Block Copolymer Crystallization Thin Films |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2009.01.048 |
| 英文摘要 | The thin films of a symmetric crystalline-coil diblock copolymer of poly(L-lactic acid) and polystyrene (PLLA-b-PS) formed lamellae parallel to the substrate surface in melt. When annealed at temperatures well above the glass transition temperature of PLLA block (T(g)(PLLA)), the PLLA chains started to crystallize, leading to reorientation of lamellae. Such reorientation behavior exhibited dependence on the correlation between the crystallization temperature (T(c)), the glass transition temperature of PS (T(g)(PS)), the peak melting point of PLLA crystals (T(m)(PLLA)), and the end melting point of PLLA crystals (T(m,end)(PLLA)). When annealed at (T(c) =) 80 degrees C (T(c) < T(g)(PS) < T(ODT), order-disorder transition temperature), 123 degrees C (T(g)(PS) < T(c) < T(m)(PLLA) < T(ODT)). 165 degrees C (T(g)(PS) < T(m)(PLLA) < T(c) < T(m,end)(PLLA) < T(ODT)), the parallel lamellae became perpendicular to the substrate surface, exclusively starting at the edge of surface relief patterns. Meanwhile, the corresponding lamellar spacing was significantly enhanced. The PLLA crystallization between PS layers was hypothesized to account for the lamella reorientation during annealing. The crystallization, chain conformation, and possible chain folding mechanisms were discussed, based on detailed analysis of the lamellar structure before and after crystallization. (C) 2009 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000264434000029 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/67079]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Han, Yanchun |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Jun,Wei, Yuhan,Xue, Longjian,et al. Lamella reorientation in thin films of a symmetric poly(L-lactic acid)-block-polystyrene upon crystallization at different temperatures[J]. POLYMER,2009,50(6):1588-1595. |
| APA | Fu, Jun.,Wei, Yuhan.,Xue, Longjian.,Luan, Bin.,Pan, Caiyuan.,...&Han, Yanchun.(2009).Lamella reorientation in thin films of a symmetric poly(L-lactic acid)-block-polystyrene upon crystallization at different temperatures.POLYMER,50(6),1588-1595. |
| MLA | Fu, Jun,et al."Lamella reorientation in thin films of a symmetric poly(L-lactic acid)-block-polystyrene upon crystallization at different temperatures".POLYMER 50.6(2009):1588-1595. |
入库方式： OAI收割
来源：化学研究所
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