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2Â¥2013-03-13 13:35:12
3Â¥2013-03-13 13:44:34
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ÎÄÕÂÔÚGoogleÉÏÒѾ¹Ò³öÀ´ÁË£º Toughening polystyrene by core¨Cshell grafting copolymer polybutadiene-graft-polystyrene with potassium persulfate as initiator http://www.sciencedirect.com/sci ... i/S1226086X12003590 |
4Â¥2013-03-13 13:47:20
5Â¥2013-03-13 13:53:08
6Â¥2013-03-13 15:14:22
7Â¥2013-03-13 16:29:53
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һƪ£ºSynthesis and characterization of fluorescent PEG-polyurethane with free carboxyl groups ÊÇSCIÀ©Õ¹°æµÄ£¬¼´Science Citation Index Expanded (SCI-EXPANDED) ÏÂÔØµØÖ·£º http://good.gd/2469405.htm ¼ìË÷ÐÅÏ¢£º FN Thomson Reuters Web of Knowledge VR 1.0 PT J AU Yang, HY Zhang, XM Duan, LJ Zhang, MY Gao, GH Zhang, HX AF Yang, Hong Yu Zhang, Xiu Mei Duan, Li Jie Zhang, Ming Yao Gao, Guang Hui Zhang, Hui Xuan TI Synthesis and characterization of fluorescent PEG-polyurethane with free carboxyl groups SO JOURNAL OF POLYMER RESEARCH AB A series of fluorescent multiblock PEG-polyurethane copolymers with free carboxyl groups were synthesized by one-step method and their chemical structure and properties were investigated. The multiblock PEG-polyurethane copolymers were composed of poly(ethylene glycol) (PEG), 1,6-hexamethylene diisocyanate, 2,2-bis (hydroxymethyl) propionic acid and a fluorescent dye erythrosine B (EB). The resulting polymers were examined by 1HNMR, FT-IR, gel permeation chromatography (GPC), ultraviolet visible spectroscopy (UV-vis), fluorescent spectroscopy. As a result, the UV-vis spectra showed that EB can be successfully conjugated into PEG-polyurethane during the one-step reaction. And the UV absorption peaks of samples were blue-shift and strengthened with decreasing of pH values, indicating that PEG-polyurethane-EB can be a pH-dependent fluorescent probe in a broad pH range. We expect that more applications would be possible for the fluorescent PEG-polyurethane with free carboxyl groups owing to its free functional groups and simultaneously imaging along with pH values. TC 1 Z9 1 SN 1022-9760 PD SEP PY 2012 VL 19 IS 9 AR 9973 DI 10.1007/s10965-012-9973-7 UT WOS:000308540500001 ER -------------------------------------------------------------------------------- EF µÚ¶þƪ£ºToughening polystyrene by core¨Cshell grafting copolymer polybutadiene-graft-polystyrene with potassium persulfate as initiator ÏÂÔØµØÖ·£º http://good.gd/2469397.htm |
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