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您的检索式：作者名="Pengchao Che"
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| 1 | Epoxy-based polymers containing methyl-substituted azobenzene chromophores and photoinduced surface relief gratings 显示文摘 | Yaning He Jianjun Yin Pengchao Che | 2006 | European Polymer Journal2006，42，： | 1 |
| 2 | Epoxy-based polymers containing methyl-substituted azobenzene chromophores and photoinduced surface relief gratings 显示文摘 | Yaning He Jianjun Yin Pengchao Che | 2006 | European Polymer Journal2006，42，： | 1 |
| 3 | Hyperbranched azo polyurethane synthesized through A_(2)+B_(3) scheme显示文摘A hyperbranched azo polyurethane was synthe-sized by one-step polymerization of an A_(2) type monomer diphenylmethane-4,4p-diisocyanate and a B_(3) type monomer 4-(N,Np-bis(2-hydroxyethyl))amino-2p-hydroxyethoxyl-4p-nitro-azobenzene.The azo polymer was characterized by 1H nuclear magnetic resonance(NMR),ultraviolet-visible(UV-Vis)spectrum and thermal analysis.The l max of the poly-mer in dimethylformamide(DMF)solution is 488 nm.The number average molecular weight(M n)determined by GPC is 9,300 with a polydispersion index 1.9.The glass transition temperature(T g)of the polymer is 131℃ observed from DSC thermogram.The results show that the azo polyurethane has been successfully synthesized through this scheme.Surface-relief-gratings(SRGs)were fabricated on the poly-mer film after being irradiated by interference pattern of Ar+laser beams for 1,000 s.The surface modulation depth and the grating space period measured by AMF are 67 and 770 nm,respectively. | Pengchao CHE Yaning HE Xiaogong WANG | 2008 | Frontiers of Chemical Science and Engineering2008，2，1： | 0 |
| 4 | Photoinduced dichroism and surface-relief-gratings of hyperbranched azo polymers synthesized by azo-coupling reaction显示文摘This article reports the synthesis and photores-ponsive properties of a hyperbranched azo polymer contain-ing electron donor-acceptor type azo chromophores both in backbone and peripheral positions.For the synthesis,a hyperbranched azo precursor polymer was synthesized by step-growth polymerization of an AB2 monomer,bis[2-(N-ethylanilino)ethyl]5-aminoisophthalate,through azo-coupling reaction.The hyperbranched precursor polymer was then reacted with the diazonium salt from 4-cyanoaniline to introduce donor-acceptor azo chromophores in the peripheral groups.The resulting azo polymers were characterized by the spectroscopic methods and thermal analysis.The photo-induced dichroism of the hyperbranched polymer was studied and its orientation order parameter was estimated to be 0.063.Thin films of the hyperbranched azo polymers were used to fabricate surface-relief-gratings(SRGs)by exposing them to an interference pattern of Ar^(+)laser beam at modest intensities(150 mW/cm^(2)).The azo chromophores introduced by post-azo-coupling reaction at the para-positions of the peripheral azobenzenes shows a significant effect on the SRG inscrip-tion rate.The hyperbranched azo polymers can potentially be used for applications such as reversible optical data storage,photoswitch,sensors,and other photo-driven devices. | CHE Pengchao HE Yaning WANG Xiaogong | 2007 | Frontiers of Chemical Science and Engineering2007，1，4： | 0 |
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