ICCAS OpenIR
Self-assembly morphology effects on the crystallization of semicrystalline block copolymer thin film
Wei, Yuhan; Pan, Caiyuan; Li, Binyao; Han, Yanchun
2007-03-14
Source PublicationJOURNAL OF CHEMICAL PHYSICS
ISSN0021-9606
Volume126Issue:10
AbstractSelf-assembly morphology effects on the crystalline behavior of asymmetric semicrystalline block copolymer polystyrene-block-poly(L-lactic acid) thin film were investigated. Firstly, a series of distinctive self-assembly aggregates, from spherical to ellipsoid and rhombic lamellar micelles (two different kinds of rhombic micelles, defined as rhomb 1 and rhomb 2) was prepared by means of promoting the solvent selectivity. Then, the effects of these self-assembly aggregates on crystallization at the early stage of film evolution were investigated by in situ hot stage atomic force microscopy. Heterogeneous nucleation initiated from the spherical micelles and dendrites with flat on crystals appeared with increasing temperature. At high temperature, protruding structures were observed due to the thickening of the flat-on crystals and finally more thermodynamically stable crystallization formed. Annealing the rhombic lamellar micelles resulted in different phenomena. Turtle-shell-like crystalline structure initiated from the periphery of the rhombic micelle 1 and spread over the whole film surface in the presence of mostly noncrystalline domain interior. Erosion and small hole appeared at the surface of the rhombic lamellar micelle 2; no crystallization like that in rhomb 1 occurred. It indicated that the chain-folding degree was different in these two micelles, which resulted in different annealing behaviors. (c) 2007 American Institute of Physics.
DOI10.1063/1.2711437
Indexed BySCI
Language英语
WOS IDWOS:000244895600030
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62936
Collection中国科学院化学研究所
Corresponding AuthorHan, Yanchun
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Changchun 130022, Peoples R China
3.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Wei, Yuhan,Pan, Caiyuan,Li, Binyao,et al. Self-assembly morphology effects on the crystallization of semicrystalline block copolymer thin film[J]. JOURNAL OF CHEMICAL PHYSICS,2007,126(10).
APA Wei, Yuhan,Pan, Caiyuan,Li, Binyao,&Han, Yanchun.(2007).Self-assembly morphology effects on the crystallization of semicrystalline block copolymer thin film.JOURNAL OF CHEMICAL PHYSICS,126(10).
MLA Wei, Yuhan,et al."Self-assembly morphology effects on the crystallization of semicrystalline block copolymer thin film".JOURNAL OF CHEMICAL PHYSICS 126.10(2007).
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