李弘
生物医用高分子合成;催化及活性聚合反应与新材料设计;高性能功能高分子。
个性化签名
- 姓名:李弘
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
高分子化学
- 研究兴趣:生物医用高分子合成;催化及活性聚合反应与新材料设计;高性能功能高分子。
李弘,男,1940年7月29日出生,1964年7月复旦大学化学系高分子专业毕业。现为南开大学高分子化学研究所教授、博士生导师。曾赴加拿大麦吉尔大学化学系(1991-93,1995-96),日本早稻田大学应化系高分子研究室(1997),法国国家科研中心功能有机材料实验室(1999,2000)等世界著名学府进修,从事催化聚合反应及新材料合成方面科研工作。现主要研究领域为:生物医用高分子合成;催化及活性聚合反应与新材料设计;高性能功能高分子。科研成果:1.主持完成国家自然科学基金科研项目5项,天津市自然科学基金科研项目3项,科技部中法国际合作研究项目1项,国家自然科学基金委中加国际合作项目2项。承担国家科技部重大基础研究前期专项科研项目1项等。2.四项科研成果通过天津市新产品技术鉴定并产业化。科研成果获教育部科技进步二等奖等五项奖励。3.在国内外重要学术刊物上发表学术研究论文128篇,专著(合著)3本,译著2本。4.中国发明专利8项。荣誉:1.荣获天津市级优秀教师称号(2002).2.被英国剑桥国际传记中心(IBC, England)授予“20世纪世界2000名优秀知识分子”称号.3. 高分子科学领域国际权威刊物“Macromolecules”特邀审稿专家.4.Chin. J. React. Polym.杂志副主编.
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成果阅读
439
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成果数
9
【期刊论文】Tailoring of polymer-supported metal catalysts for selective hydrogenation1
李弘, Hong Li *, Binglin He
Reactive & Functional Polymers 26(1995)61-66,-0001,():
-1年11月30日
Several functional polystyrene-supported metal (Ru, Rh, Pd) catalysts were synthesized. The hydrogenation selec-tivity of these catalysts for polyunsaturated cycloolefines (1,5,9-cyclododecatriene, cyclopentadiene) and unsaturated carbonyl compounds (mesityl oxide, crotonaldehyde acrylic aldehyde) was investigated. Some important factors (pore size, crosslinkage of polymer supports, donor atoms and substituents thereon) for the tailoring of supports and ligands which have great influence over the hydrogcnation selectivity of the supported metal catalysts are discussed.
Polymeric catalysts, Selective hydrogenation, Ruthenium, Rhodium, Palladium
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李弘, Hong Li *, Zheng Wang, Yuqin Wang, Binglin He
Reactive & Functional Polymers 33(1997)193-200,-0001,():
-1年11月30日
Ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was carried out by using (ArO)6-xWClx-Et2A1C1 (ArO: 2,6-ditertiarybutyl-p-cresoxy, x=3, 4, 6) and the corresponding polymer-supported catalytic systems. Influences of different homogeneous catalysts, polymerization conditions and immobilization of the homogeneous catalytic systems on polymerization (gelation time, monomer conversion) and synthesized polydicyclopen-tadiene's (PDCPD's) mechanical properties were investigated. The experimental results show that using the polymer-supported catalytic systems can not only increase the monomer conversion of polymerization but also improve the synthesized polymer's mechanical properties to a certain extent.
Ring-opening metathesis polymerization, Polydicyclopentadiene, Dicyclopentadiene, Polymer-supported catalysts
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李弘, Hong Li *, Zheng Wang, Binglin He
Journal of Molecular Catalysis A: Chemical 147(1999)83-88,-0001,():
-1年11月30日
Ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was conducted by using catalyst systems WCl6-Et2AlCl, (WCl6-PhCOMe)-Et2AlCl and their polystyrene supported counterparts. Experimental results indicate that the acetophenone modified catalyst system shows better catalytic properties than the unmodified system does and that supporting the catalysts on a polystyrene can improve further the catalyst systems'catalytic properties. As a result, the polymer yield of the ROMP increased, the mechanical properties of NIS (notched impact strength), TS (tensile strength) of synthesized polydicyclopentadiene (PDCPD) enhanced. The mechanism in which supporting improves the properties of the catalyst systems is discussed.
Ring-opening metathesis polymerization, Dicyclopentadiene, Tungsten, Supported catalyst
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李弘, Zheng Wang, Hong Li *, Binglin He
Journal of Molecular Catalysis A: Chemical 159(2000)121-125,-0001,():
-1年11月30日
The macroligand effect of the catalytic system WCl6-Et2AlCl for ring opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was investigated. The experimental results show that macroligand effect varies with the structure of the ligands. The macroligands bearing benzene group and steric hindered phenolic unit not only can obviously increase the yield of synthesized polydicyclopentadiene (PDCPD) but also improve the synthesized polymer's mechanical properties. The mechanism of macroligand effect is discussed. The synthesized PDCPD was characterized by methods of scanning electron microscopy (SEM) and X-ray diffraction.
Ring opening metathesis polymerization, Polydicyclopentadiene, Macroligand effect
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李弘, Hong Li *, Wenfang Zhang, Yuqin Wang and Binglin He
Polym. Adv. Technol. 14, 226-231 (2003),-0001,():
-1年11月30日
The Diels-Alder reaction of cyclopontadione (CPD) and allyl chloride (AC) was carried out by using BF3
ring-opening metathesis polymerization, Diels-Alder reaction, polymer-supported catalysts
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【期刊论文】Living Ring-Opening Polymerization of Lactides Catalyzed by Guanidinium Acetate
李弘, HONG LI, CHENHONG WANG, JIN YUE, XIAONA ZHAO, FENG BAI
,-0001,():
-1年11月30日
Hexabutyl guanidinium acetate (HBG•OAc) was synthesized and successfully used as a catalyst for the ring-opening polymerization (ROP) of lactides. The experimental results indicated that the guanidinium salt HBG•OAc showed satisfactory catalytic behavior. Polymerization in bulk (120℃, 18h) produced polylactides with moderate molecular weights (number-average molecular weight=2.0×104) and very narrow molecular weight distributions (polydispersity index=1.07-1.12). A kinetic study of polymerization in bulk with HBG•OAc as an initiator revealed that the polymerization possessed typical characteristics of living polymerization. A ROP mechanism by HBG•OAc was proposed on the basis of the additive effect of the polymerization and the 1H NMR characterization of the microstructure of the product polymers.
hexabutyl guanidinium acetate, lactide, ring-opening polymerization, living polymerization, biodegradable polymers
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【期刊论文】Ring opening polymerization of L-Lactide initiated by creatinine
李弘, Chenhong Wang, Hong Li *, Xiaona Zhao
Biomaterials 25(2004)5797-5801,-0001,():
-1年11月30日
L-lactide was first successfully ring-opening polymerized in bulk using creatinine initiator. Poly (L-lactide) (PLLA) synthesized possesses a moderate molecular weight (MW) (Mn=1.56
Polylactides, Creatinine, Ring opening polymerization, Biodegradable polymers
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李弘, Hong Li, Franqois Gauvin and John F. Harrod*
Organometallics 1993, 12, 575-577,-0001,():
-1年11月30日
Neither dimethylhafnocene nor [1, 2-bis (tetrahydroindenyl) ethane] dimethylzirconium, 1, reacts at anappreciable rate with phenylsilane. In the case of the hafnium compound, this results in complete masking of catalytic activity toward dehydrocoupling of phenylsilane, while in the case of 1 activity is greatly suppressed. This behavior is governed by the low reactivity of the M-C bonds toward σ-bond metathesis with silanes. Catalysts generated by reaction of MeLi and PhSiH3 with hafnocene dichloride or [1,2-bis (tetrahydroindeny1)-ethune] dichlorozirconium, 2, show high activities toward PhSiH3coupling. The molecular weights of the resulting polymers are significantly higher than those of polymers derived from CpzTiMez and CpzZrMez catalysts, and the hafnocene catalyst gives unusually low proportions of low molecular weight cyclic products. It is proposed that the catalyst species, probably a hydrido silyl complex, in these new systems are generated by reaction of a reactive lithium hydride, resulting from rapid reaction of MeLi with PhSiH3, with the chloro complexes.
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【期刊论文】Living Ring-Opening Polymerization of L-Lactide Catalyzed by Red-Al
李弘, Hong Li, *, †, Chenhong Wang, Feng Bai, Jin Yue, † and Hee-Gweon Woo*, ‡
Organometallics 2004, 23, 1411-1415,-0001,():
-1年11月30日
Ring-opening polymerization (ROP) of L-lactide (LLA) was carried out in bulk and toluene solution, respectively, using sodium bis (2-methoxyethoxy) aluminum hydride (Red-Al) as the catalyst (initiator). Experimental results show that Red-Al possesses typical characteristics of a living polymerization initiator. Bulk polymerization (110℃, 48 h) of LLA gives a snowwhite polymer of high isotacticity (≥95.2%), moderate molecular weight (MW) (Mn=2.3×104), and quite narrow MW distribution (MWD, PDI=1.12). Investigation of the kinetics of the polymerization in toluene shows that plots of In ([M]0/[M]t) versus time and Mn (numberaverage MW) of synthesized PLLA versus monomer conversion are linear, which is a typical feature of living polymerization. The mechanism of the ROP was postulated on the basis of 1H NMR monitoring of the polymerization. The synthesized PLLA shows high isotacticity. The degree of transesterification and stereoselectivity of the ROP by Red-Al were estimated according to 13C NMR characterization of poly rac-LA.
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