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	Single crystals of the poly(l-lactide) block and the poly(ethylene glycol) block in poly(l-lactide)-poly(ethylene glycol) diblock copolymer
	Yang, Junliang; Zhao, Ting; Zhou, Yunchun; Liu, Leijing; Li, Gao; Zhou, Enle; Chen, Xuesi
刊名	Macromolecules
	2007-04-17
卷号	40期号:8页码:2791-2797
ISSN号	0024-9297
DOI	10.1021/ma062727z
通讯作者	Li, gao(ligao@ciac.jl.cn)
英文摘要	Single crystals of the poly(l-lactide) (plla) block and the poly(ethylene glycol) (peg) block in poly(l-lactide)-poly(ethylene glycol) diblock copolymer were obtained by melt crystallization. the morphology, structure, and evolution process of the single crystals were investigated using transmission electron microscopy (tem), selected-area electron diffraction (saed), and real-time atomic force microscopy (afm). two types of crystal morphology were obtained. one was the regular morphology of a single crystal: lozenge-spiral dislocation, lozenge multilayer, and hexagonal (or truncated-lozenge) multilayer, which was layer-by-layer structure. the foregoing crystallization of the plla block determined the regular morphology of single crystal. the other type of crystal morphology was that the layer-dendritic crystal, which was affirmed to be the peg crystal by real-time afm, formed at the edge of the regular single crystal and grew along some certain directions on the crystal surface of the plla block. the forming of layer-dendritic crystal was through the reorganization of metastable phase crystal of the peg block. the saed results indicated that the (001) plane of the plla crystal was parallel to the (10-4) plane of the peg crystal and the substrate. the foregoing crystallization of the plla block had an effect on the crystal orientation of the peg block.
WOS关键词	CORE-SHELL NANOPARTICLES ; CRYSTALLIZATION BEHAVIOR ; ISOTHERMAL CRYSTALLIZATION ; MULTIBLOCK COPOLYMERS ; ETHYLENE-OXIDE ; MORPHOLOGY ; NUCLEATION ; TRANSFORMATION ; ORGANIZATION ; DEGRADATION
WOS研究方向	Polymer Science
WOS类目	Polymer Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000245549700021
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2380366
专题	中国科学院大学
通讯作者	Li, Gao
作者单位	Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Yang, Junliang,Zhao, Ting,Zhou, Yunchun,et al. Single crystals of the poly(l-lactide) block and the poly(ethylene glycol) block in poly(l-lactide)-poly(ethylene glycol) diblock copolymer[J]. Macromolecules,2007,40(8):2791-2797.
APA	Yang, Junliang.,Zhao, Ting.,Zhou, Yunchun.,Liu, Leijing.,Li, Gao.,...&Chen, Xuesi.(2007).Single crystals of the poly(l-lactide) block and the poly(ethylene glycol) block in poly(l-lactide)-poly(ethylene glycol) diblock copolymer.Macromolecules,40(8),2791-2797.
MLA	Yang, Junliang,et al."Single crystals of the poly(l-lactide) block and the poly(ethylene glycol) block in poly(l-lactide)-poly(ethylene glycol) diblock copolymer".Macromolecules 40.8(2007):2791-2797.

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