Association of Block Copolymer in Nonselective Solvent

doi:10.1021/ma900740b

CORC > 北京大学 > 化学与分子工程学院

	Association of Block Copolymer in Nonselective Solvent
	Ke, Fuyou ; Mo, Xiulei ; Yang, Runmiao ; Wang, Yanmei ; Liang, Dehai
刊名	macromolecules
	2009
关键词	DYNAMIC LIGHT-SCATTERING DIBLOCK COPOLYMER DRUG-DELIVERY AGGREGATION BEHAVIOR THIN-FILMS POLY(ETHYLENE GLYCOL) POLYMER-SOLUTIONS AQUEOUS-SOLUTION WATER POLY(N-ISOPROPYLACRYLAMIDE)
DOI	10.1021/ma900740b
英文摘要	The behavior of poly(ethylene oxide)-block-poly(N,N-dimethylacrylamide) (PEO-b-PDMA) in aqueous solution at dilute concentrations was studied by laser light scattering. Even though water was a nonselective solvent for both PEO and PDMA blocks, PEO-b-PDMA formed a certain loose associate in aqueous solutions. Different from the micellization of block copolymers in selective solvents, the association of PEO-b-PDMA in aqueous solution showed weak concentration and temperature dependence as well as opposite salt effect. At 4.0 M NaCl, the association was completely suppressed and PEO-b-PDMA existed as individual polymer chains. This opposite "salting out" effect revealed the association mechanism of block copolymers in nonselective solvent: the solubility of PEO block in aqueous solution was unique, and it exhibited a better hydrophilicity and thick hydration shell than other water-soluble polymers. This inequality or weak incompatibility drove the block copolymer to associate into loose structures containing multi-domains rich of either blocks. The dependence of the association on the block ratio also supported our conclusions.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000268175800057&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Polymer Science; SCI(E); EI; 24; ARTICLE; 14; 5339-5344; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151373]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Ke, Fuyou,Mo, Xiulei,Yang, Runmiao,et al. Association of Block Copolymer in Nonselective Solvent[J]. macromolecules,2009.
APA	Ke, Fuyou,Mo, Xiulei,Yang, Runmiao,Wang, Yanmei,&Liang, Dehai.(2009).Association of Block Copolymer in Nonselective Solvent.macromolecules.
MLA	Ke, Fuyou,et al."Association of Block Copolymer in Nonselective Solvent".macromolecules (2009).