Cylindrical Molecular Brushes with a Loose Grafting Density

doi:10.1002/pola.23603

CORC > 化学研究所 > 中国科学院化学研究所

	Cylindrical Molecular Brushes with a Loose Grafting Density
	Deng, Guohua 3; Chen, Yongming 1,2
刊名	JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
	2009-10-15
卷号	47 期号:20 页码:5527-5533
关键词	Atrp Copolymerization Graft Copolymers Molecular Brushes
ISSN号	0887-624X
DOI	10.1002/pola.23603
英文摘要	A cylindrical molecular brush with a low graft density was synthesized by two steps. Firstly, free radical alternating copolymerization of styrene (St) and N-[2-(2-bromoisobutyryloxy)ethyl] maleimide (BiBEMI) gave a macroinitiator where pendant initiating sites for atom transfer radical polymerization (ATRP) being positioned along the backbone with an interval of four C-C bonds. The backbone-to-be with an alternating sequence was verified by elemental analysis (EA). Secondly, grafting poly(tert-butyl acrylate) chains from the macroinitiator by ATRP produced the novel molecular brush. Size exclusion chromatography, static light scattering (SLS), and (1)H NMR and atomic force microscopy (AFM) were used to characterize the macroinitiator and the molecular brush. The results show that the backbone contains an average 730 repeat units (1 repeat unit = a pair of St and BiBEMI) and the absolute molecular weight of the brush, M(w,sLS), was 4.88 x 10(6) Da. The brush reveals a number average length L(n) to be 96 nm under AFM observation on carbon coated mica, corresponding to the length per main chain monomer unit (L(unit)) of 0.066 nm, indicating a less extended conformation due to the low grafting density. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 5527-5533, 2009
语种	英语
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000270692100031
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/66353]
专题	中国科学院化学研究所
通讯作者	Chen, Yongming
作者单位	1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100190, Peoples R China 2.Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Deng, Guohua,Chen, Yongming. Cylindrical Molecular Brushes with a Loose Grafting Density[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2009,47(20):5527-5533.
APA	Deng, Guohua,&Chen, Yongming.(2009).Cylindrical Molecular Brushes with a Loose Grafting Density.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(20),5527-5533.
MLA	Deng, Guohua,et al."Cylindrical Molecular Brushes with a Loose Grafting Density".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 47.20(2009):5527-5533.