H-1 NMR study on microstructure of a novel acrylamide/methacrylic acid template copolymer in aqueous solution

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	H-1 NMR study on microstructure of a novel acrylamide/methacrylic acid template copolymer in aqueous solution
	Liu, AH ; Mao, SZ ; Liu, ML ; Zhang, YX ; Wu, FP ; Li, MZ ; Wang, EJ ; Cheng, GZ ; Du, YR
刊名	COLLOID AND POLYMER SCIENCE
	2007
卷号	285 期号:4 页码:381
关键词	POLY(ACRYLIC ACID) TEMPERATURE POLY(N-ISOPROPYLACRYLAMIDE)
ISSN号	0303-402X
通讯作者	Mao, SZ: Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China.
中文摘要	A novel acrylamide/methacrylic acid template copolymer was prepared using polyallylammonium chloride (PAAC) as a template. This copolymer contains acrylamide (PAM), phenoxy acrylate (POA), and acylic acid (PAA) blocks. The investigation by high resolution nuclear magnetic resonance (H-1 NMR) shows that intramolecular hydrogen bonds between the PAM and PAA blocks lead to compact molecular arrangement at quite low pH values, and the motion of the phenoxy side chain of the POA blocks is somewhat restricted. With the increase in pH value of the solution, the carboxylic acid of the PAA block gradually dissociates, which weakens hydrogen bonds between the PAM and PAA blocks. The decrease in D (w), self-diffusion coefficient of water, indicates the growth in aggregate size of the template copolymer. The cross peaks between amide protons and backbone protons shown in 2D nuclear overhauser spectroscopy (NOESY) spectra imply the existence of the intermolecular hydrogen bonding interaction between PAM and PAA blocks. After the carboxylic acid of the PAA block is completely dissociated in alkaline solution, the electrostatic repulsion of the carboxylic ion makes the molecular chain of the copolymer exhibit more outstretched. Consequently, the phenoxy groups (the side chain of the POA block) have more space to move.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/39035]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, AH,Mao, SZ,Liu, ML,et al. H-1 NMR study on microstructure of a novel acrylamide/methacrylic acid template copolymer in aqueous solution[J]. COLLOID AND POLYMER SCIENCE,2007,285(4):381.
APA	Liu, AH.,Mao, SZ.,Liu, ML.,Zhang, YX.,Wu, FP.,...&Du, YR.(2007).H-1 NMR study on microstructure of a novel acrylamide/methacrylic acid template copolymer in aqueous solution.COLLOID AND POLYMER SCIENCE,285(4),381.
MLA	Liu, AH,et al."H-1 NMR study on microstructure of a novel acrylamide/methacrylic acid template copolymer in aqueous solution".COLLOID AND POLYMER SCIENCE 285.4(2007):381.