Ring-shaped morphology in H-shaped block copolymer thin films
Ring-shaped morphology in H-shaped block copolymer thin films
复制标题
H形嵌段共聚物薄膜中的环形形貌
DOI：
10.1039/b806258g
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发表时间：
2008-11
期刊：
影响因子：
3.4
通讯作者：
Wei, Yuhan
中科院分区：
文献类型：
--
作者：
Pan, Caiyuan;Li, Binyao;Han, Yanchun;Wei, Yuhan
在H形嵌段共聚物[具有聚苯乙烯支链的聚（乙二醇）主链，即，[（PS）2PEG（PS）2]薄膜在饱和的PEG选择性乙腈蒸气中退火。我们的研究结果清楚地表明，环的形成是由旋涂膜的初始形态，溶剂蒸气的选择性和环境温度的溶剂退火过程。只有具有初始核壳圆柱结构的膜在强PEG选择性的乙腈蒸气中才能形成环状结构。环境温度对形成机制有影响。结果表明，在15 °C的环境温度下进行PEG选择性气相退火处理时，由于PEG壳层向顶面的迁移，导致了原始旋涂（PS）2PEG（PS）2膜的核壳圆柱结构中出现的环状结构。而在较高的环境温度（25 °C）下，膜的溶胀程度和链的迁移率增加，此时的成环机理与稀溶液中的成环机理相似。
The formation of ring-shaped structures in an H-shaped block copolymer [a poly(ethylene glycol) backbone with polystyrene branches, i.e., (PS)2PEG(PS)2] thin film was investigated when it was annealed in saturated PEG-selective acetonitrile vapor. Our results clearly indicate that ring formation is determined by the initial morphology of the spin-coated film, the solvent vapor selectivity and the environmental temperature of the solvent-annealing process. Only the films with the initial core–shell cylindrical structure in strongly PEG-selective acetonitrile vapor could form the ring-shaped structures. Environmental temperature has an influence on the formation mechanisms. It was proven that the rings arising from the core–shell cylindrical structure of the pristine spin-coated (PS)2PEG(PS)2 film were caused by the migration of the PEG shells to the top surface in the process of PEG-selective vapor annealing at the environmental temperature of 15 °C. While at a higher environmental temperature (25 °C), the degree of swelling of the film and the chains’ mobility increased and the formation mechanism of the rings in this situation was similar to that in dilute solution.
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影响因子：
5.5
作者：
Eunji Lee;Y. Jeong;Jung‐Keun Kim;Myongsoo Lee
通讯作者：
Eunji Lee;Y. Jeong;Jung‐Keun Kim;Myongsoo Lee
DOI：
10.1039/f29767201525
发表时间：
1976-01-01
期刊：
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II
影响因子：
--
作者：
ISRAELACHVILI, JN;MITCHELL, DJ;NINHAM, BW
通讯作者：
NINHAM, BW
影响因子：
56.9
作者：
Pochan, DJ;Chen, ZY;Wooley, KL
通讯作者：
Wooley, KL
影响因子：
15
作者：
Zhang, LF;Eisenberg, A
通讯作者：
Eisenberg, A
影响因子：
5.5
作者：
T. Russell;A. Menelle;S. H. Anastasiadis;S. Satija;C. Majkrzak
通讯作者：
T. Russell;A. Menelle;S. H. Anastasiadis;S. Satija;C. Majkrzak