Solvent effect on the aggregation behavior of rod-coil diblock copolymers

doi:10.1021/la703888m

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	Solvent effect on the aggregation behavior of rod-coil diblock copolymers
	Zhang, Jie; Lin, Weiran; Liu, Anhua; Yu, Zhenning; Wan, Xinhua; Liang, Dehai; Zhou, Qifeng
刊名	LANGMUIR
	2008-04-15
卷号	24 期号:8 页码:3780-3786
ISSN号	0743-7463
DOI	10.1021/la703888m
英文摘要	The water-induced aggregation behavior of rod-coil diblock copolymers based on poly(ethylene oxide) (PEO) and poly 1(+)-2,5-bis[4'-((S)-2-methylbutoxy)phenyl]styrene} (PMBPS), PEO104-b-PMBPS53, was investigated in the common solvent THF and in the selective solvent dioxane. Before adding water, PEO104-b-PMBPS53 stayed as single polymer chains no matter what conformation the PEO block took (i.e., either the random coil conformation in THF or the compact globule conformation in dioxane). The critical water content (similar to 6 wt%) at which PEO104-b-PMBPS53 began to aggregate was also similar in both solvents, indicating that PMBPS dominated the aggregation process. However, the size, the size distribution, and the morphology of aggregates in THF/water were quite different from those in dioxane/water. Narrowly distributed spheres with R-h approximate to 20 nm were observed in dioxane, whereas in THF, a bimodal distribution peaked at 3 and similar to 300 nm, was observed. The results from 2D wide-angle X-ray diffraction and polarized optical microscopy demonstrated that the PMBPS blocks packed in a parallel pattern upon aggregation in dioxane/water. The anisotropic disclike structures observed in THF/water also indicated the orientation of the PMBPS blocks upon forming aggregates in dilute solution.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000254647400015
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/65043]
专题	中国科学院化学研究所
通讯作者	Wan, Xinhua
作者单位	Peking Univ, Coll Chem & Mol Engn, Key Lab Polymer Chem & Phys MOE, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jie,Lin, Weiran,Liu, Anhua,et al. Solvent effect on the aggregation behavior of rod-coil diblock copolymers[J]. LANGMUIR,2008,24(8):3780-3786.
APA	Zhang, Jie.,Lin, Weiran.,Liu, Anhua.,Yu, Zhenning.,Wan, Xinhua.,...&Zhou, Qifeng.(2008).Solvent effect on the aggregation behavior of rod-coil diblock copolymers.LANGMUIR,24(8),3780-3786.
MLA	Zhang, Jie,et al."Solvent effect on the aggregation behavior of rod-coil diblock copolymers".LANGMUIR 24.8(2008):3780-3786.