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AB(2)-Type Amphiphilic Block Copolymers Composed of Poly(ethylene glycol) and Poly(N-isopropylacrylamide) via Single-Electron Transfer Living Radical Polymerization: Synthesis and Characterization
Tang, Xinde1,2,3; Liang, Xiaochao2,3; Yang, Qian2,3; Fan, Xinghe2,3; Shen, Zhihao2,3; Zhou, Qifeng2,3
2009-09-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume47Issue:17Pages:4420-4427
AbstractNovel AB(2)-type amphiphilic block copolymers of poly(ethylene glycol) and poly(N-isopropylacrylamide), PEG-b-(PNIPAM)(2), were successfully synthesized through single-electron transfer living radical polymerization (SET-LRP). A difunctional macroinitiator was prepared by esterification of 2,2-dichloroacetyl chloride with poly(ethylene glycol) monomethyl ether (PEG). The copolymers were obtained via the SET-LRP of N-isopropylacrylamide (NIPAM) with CuCl/tris(2-(dimethylamino)ethyl)amine (Me6TREN) as catalytic system and DMF/H2O (v/v = 3:1) mixture as solvent. The resulting copolymers were characterized by gel permeation chromatography and H-1 NMR. These block copolymers show controllable molecular weights and narrow molecular weight distributions (PDI < 1.15). Their phase transition temperatures and the corresponding enthalpy changes in aqueous solution were measured by differential scanning calorimetry. As a result, the phase transition temperature of PEG(44)-b-(PNIPAM(55))(2) is similar to that in the case of PEG(44)-b-PNIPAM(110); however, the corresponding enthalpy change is much lower, indicating the significant influence of the macromolecular architecture on the phase transition. This is the first study into the effect of macromolecular architecture on the phase transition using AB(2)-type amphiphilic block copolymer composed of PEG and PNIPAM. (C) 2009 Wiley Periodicals, Inc. J Polyrn Sci Part A: Polym Chem 47: 4420-4427, 2009
KeywordAb(2)-type Amphiphiles Amphiphilic Block Copolymer Atom Transfer Radical Polymerization (Atrp) Block Copolymers Poly(Ethylene Glycol) Poly(N-isopropylacrylamide) Single-electron Transfer Living Radical Polymerization (Set-lrp) Star Polymers Stimuli-sensitive Polymers
DOI10.1002/pola.23495
Indexed BySCI
Language英语
WOS IDWOS:000269090300018
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:68[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67674
Collection中国科学院化学研究所
Corresponding AuthorTang, Xinde
Affiliation1.Shandong Jiaotong Univ, Inst New Mat, Jinan 250023, Peoples R China
2.Peking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
3.Peking Univ, Coll Chem & Mol Engn, Minist Educ, Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Tang, Xinde,Liang, Xiaochao,Yang, Qian,et al. AB(2)-Type Amphiphilic Block Copolymers Composed of Poly(ethylene glycol) and Poly(N-isopropylacrylamide) via Single-Electron Transfer Living Radical Polymerization: Synthesis and Characterization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2009,47(17):4420-4427.
APA Tang, Xinde,Liang, Xiaochao,Yang, Qian,Fan, Xinghe,Shen, Zhihao,&Zhou, Qifeng.(2009).AB(2)-Type Amphiphilic Block Copolymers Composed of Poly(ethylene glycol) and Poly(N-isopropylacrylamide) via Single-Electron Transfer Living Radical Polymerization: Synthesis and Characterization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(17),4420-4427.
MLA Tang, Xinde,et al."AB(2)-Type Amphiphilic Block Copolymers Composed of Poly(ethylene glycol) and Poly(N-isopropylacrylamide) via Single-Electron Transfer Living Radical Polymerization: Synthesis and Characterization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 47.17(2009):4420-4427.
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