Dynamic properties of polyampholyte hydrogel elucidated by proton NMR spin-spin relaxation time

	Dynamic properties of polyampholyte hydrogel elucidated by proton NMR spin-spin relaxation time
	Lu CG ; Xu K ; Li WB ; Li PC ; Tan Y ; Wang PX
刊名	chemical research in chinese universities
	2013
卷号	29 期号:6 页码:1203-1207
关键词	LOW-FIELD NMR HIGH-PRESSURE H-1-NMR RELAXATION COPOLYMER GELS TEMPERATURE TRANSITION KINETICS SYSTEM STARCH CHAINS
ISSN号	1005-9040
通讯作者	wang px
中文摘要	h-1 spin-spin relaxation time(t (2)) measurement of polyampholyte hydrogel poly(methylacrylic acidacryloyloxyethyl trimethylammonium chloride)[p(ma-dac)] in different ph, ionic strength and temperature was carried out to reveal the molecular mobility. spontaneous volume transition of the polyampholyte hydrogel was also investigated by spin-spin relaxation time measurement. meanwhile t (2) and the proton component fraction were acquired to study the swelling behaviour of the hydrogel. moreover the changes of t (2) characterized the molecular mobility of polyampholyte hydrogel in various swelling states. and the results suggest that the mobility of the main chains and a few free side chains(the long t (2)) of p(ma-dac) was dominated by the mesh size in the hydrogel network, depending on the swelling ratio(q) and the mobility of the side chains(the short t (2)) was influenced by electrostatic interaction between different charges in polymer side chains. finally the t (2) measurements of p(ma-dac) hydrogel in the spontaneous swelling-deswelling process demonstrated the electrostatic interaction of the charged side chains caused deswelling behavior. at the same time, the mobility state transition temperature of the charged side chains was also studied by the h-1 spin-spin relaxation time measurements, and the transition activation energy of the side chains is 2.72 kj.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000329095200036
公开日期	2014-04-15
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49420]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Lu CG,Xu K,Li WB,et al. Dynamic properties of polyampholyte hydrogel elucidated by proton NMR spin-spin relaxation time[J]. chemical research in chinese universities,2013,29(6):1203-1207.
APA	Lu CG,Xu K,Li WB,Li PC,Tan Y,&Wang PX.(2013).Dynamic properties of polyampholyte hydrogel elucidated by proton NMR spin-spin relaxation time.chemical research in chinese universities,29(6),1203-1207.
MLA	Lu CG,et al."Dynamic properties of polyampholyte hydrogel elucidated by proton NMR spin-spin relaxation time".chemical research in chinese universities 29.6(2013):1203-1207.