Shape memory polyurethanes containing azo exhibiting photoisomerization function

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	Shape memory polyurethanes containing azo exhibiting photoisomerization function
	Wang TM(王廷梅); Wang QH(王齐华); Wang QH(王齐华); Wang C(王超)
刊名	Journal of Materials Chemistry
	2010
卷号	20 页码:9976-9981
ISSN号	0959-9428
通讯作者	王齐华
中文摘要	A series of azobenzene-containing polyurethanes (azoPU) was synthesized. The structure of the azoPUand the synthesis process were detected by FTIR and nuclear magnetic resonance (NMR), and thetransition temperature was determined by differential scanning calorimetry (DSC). Tensile and cyclicthermomechanical experiment results revealed that excellent mechanical properties, shape ﬁxity (Rf),and shape recovery (Rr) were obtained by the addition of azo to the chain of PU. Rr and Rf of azoPUincreased with the increase of hard segment (HS) content. The higher HS content enhanced interactionamong polymer chains as the chances of induced dipole–dipole interaction between aromatic ringsincreased in the presence of azo in the main chain. The materials presented trans-cis isomerizationunder UV irradiation in addition to the shape memory effect. The UV-vis spectrum indicated thatphotoisomerization occurred both in solution and solid state. It is expected that the work may behelpful in expanding the application of shape memory PU in areas of drug release and optical data storage.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the innovative group foundation from NSFC (Grant No. 50721062);the important direction project for the knowledge innovative engineering of Chinese Academy of Sciences (Grant No. KGCX3-SYW- 205);the National 973 project of China (2007CB607606)
语种	英语
WOS记录号	WOS:000283743000023
公开日期	2012-09-28
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/1014]
专题	兰州化学物理研究所_固体润滑国家重点实验室兰州化学物理研究所_先进润滑与防护材料研究发展中心
通讯作者	Wang QH(王齐华); Wang QH(王齐华)
推荐引用方式 GB/T 7714	Wang TM,Wang QH,Wang QH,et al. Shape memory polyurethanes containing azo exhibiting photoisomerization function[J]. Journal of Materials Chemistry,2010,20:9976-9981.
APA	王廷梅,王齐华,王齐华,&王超.(2010).Shape memory polyurethanes containing azo exhibiting photoisomerization function.Journal of Materials Chemistry,20,9976-9981.
MLA	王廷梅,et al."Shape memory polyurethanes containing azo exhibiting photoisomerization function".Journal of Materials Chemistry 20(2010):9976-9981.