SOLVENT-INDUCED RING-SHAPED MORPHOLOGY IN H-SHAPED BLOCK COPOLYMER THIN FILM
Changing interfacial interaction of the thin film by using solvent vapor treatment has been turned out to be an effective method to manipulate microstructure of block copolymer thin films in the past decades.1 In this report, we explore the microstructure of the H-shaped block copolymer (a poly(ethylene glycol) backbone and polystyrene branches, i.e., (PS)2PEG(PS)2) thin film annealed in saturated solvent vapor. Ring-shaped morphology is observed as the film is annealed in PEG-affinitive acetonitrile solvent vapor. Figure 1 displays the morphological evolution of the H-shaped (PS)2PEG(PS)2 copolymer film after exposed to the saturated acetonitrile vapor at 15℃ for different time. Cylindrical morphology forms in the pristine spincoated film (Figure 1a). After exposed to the acetonitrile vapor for 2h, ring-shaped structure appears at the continuous portion of the film (Figure 1b).
Yuhan Wei Binyao Li Yanchun Han Caiyuan Pan
State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,5625 Renmin Street,Changchun 130022,P.R.China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
170-171
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）