Interplay between two phase transitions: Crystallization and liquid-liquid phase separation in a polyolefin blend

doi:10.1063/1.2208997

CORC > 化学研究所 > 中国科学院化学研究所

	Interplay between two phase transitions: Crystallization and liquid-liquid phase separation in a polyolefin blend
	Zhang, Xiaohua ; Wang, Zhigang ; Dong, Xia ; Wang, Dujin ; Han, Charles C.
刊名	JOURNAL OF CHEMICAL PHYSICS
	2006-07-14
卷号	125 期号:2
ISSN号	0021-9606
DOI	10.1063/1.2208997
英文摘要	The interplay between liquid-liquid phase separation (LLPS) and crystallization at several compositions in statistical copolymer blends of poly(ethyleneco-hexene) and poly(ethylene-cobutene) has been examined by optical microscopy (OM), atomic force microscopy (AFM), and differential scanning calorimetry (DSC). The phase contrast optical microscopy shows interconnected bicontinuous structures for deeply quenched LLPS, characteristic of spinodal decomposition. After a second quench to a temperature below the melting point, an overwhelming change in crystallization kinetics has been clearly observed, which is caused by the increase of the nucleation rate assisted by concentration fluctuations due to the spontaneous spinodal LLPS. We propose a new mechanism of "fluctuation assisted nucleation" in the crystallization process for such interactive process in a blend system. The experimental results from OM, AFM, and DSC measurements at various conditions are all consistent with the fluctuation assisted nucleation model. (c) 2006 American Institute of Physics.
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000239055600046
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/59919]
专题	中国科学院化学研究所
通讯作者	Han, Charles C.
作者单位	1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat,Beijing Natl Lab Mol, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaohua,Wang, Zhigang,Dong, Xia,et al. Interplay between two phase transitions: Crystallization and liquid-liquid phase separation in a polyolefin blend[J]. JOURNAL OF CHEMICAL PHYSICS,2006,125(2).
APA	Zhang, Xiaohua,Wang, Zhigang,Dong, Xia,Wang, Dujin,&Han, Charles C..(2006).Interplay between two phase transitions: Crystallization and liquid-liquid phase separation in a polyolefin blend.JOURNAL OF CHEMICAL PHYSICS,125(2).
MLA	Zhang, Xiaohua,et al."Interplay between two phase transitions: Crystallization and liquid-liquid phase separation in a polyolefin blend".JOURNAL OF CHEMICAL PHYSICS 125.2(2006).