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您现在的位置:欢乐时时彩 > 资料 > immortal 的搜索结果 共有结果13,当前从第1条到第10条,本次搜索耗时0
 
The Highly Efficient Strategy to Synthesize Polylactide - Immortal Polymerization
Polylactide is an important part of biodegradable material. Among the numerous synthesis methods "immortal polymerization" has aroused researchers'' attention in just recent years. This review introduces the latest developments of lactide "immortal polymerization" catalytic systems. in which monobasic, polyhydric or functionalized alcohol act as chain transfer agents with rare earth me...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_12028.html
 
Copolymerization of ε-Caprolactone and l-Lactide Catalyzed by Multinuclear Aluminum Complexes: An Immortal Approach
A series of aluminum complexes LaAl2Me4 (1), Lb2Al4Me4 (2), and LcAl2Me4 (3) have been prepared from the reaction of AlMe3 with Salan- and Salen-type ligands (LaH2 = [2-OH-3,5-tBu2-C6H2CH2N(CH3)]2-(m-phenylene); LbH4 = [2-OH-3,5-tBu2-C6H2CH2NH]2-(m-phenylene); LcH2 = [2-OH-3,5-tBu2-C6H2CH═N]2-(m-phenylene)), respectively. All these complexes were characterized...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_12001.html
 
Organometallic catalytic system mediated immortal-shuttling polymerizations to synthesize topologic stereoblock gradient functional polymers
One of the most studied and promising topics in polymer science is to prepare polymers with tailor-made microstructures in terms of controlled molecular weight, narrow polydispersity, precise composition, versatile chemical functionality, topolo...
http://www.stageastar.com/research/dis_info16466
 
Organometallic catalytic system mediated immortal-shuttling polymerizations to synthesize topologic stereoblock gradient functional polymers
One of the most studied and promising topics in polymer science is to prepare polymers with tailor-made microstructures in terms of controlled molecular weight, narrow polydispersity, precise composition, versatile chemical functionality, topolo...
http://www.stageastar.com/research/dis_info16466
 
Magnesium and Zinc Complexes Supported by N,O-Bidentate Pyridyl Functionalized Alkoxy Ligands: Synthesis and Immortal ROP of ε-CL andl-LA
The N,O-bidentate pyridyl functionalized alkoxy ligands 2-(6-methyl-2-pyridinyl)-1,1-dimethyl-1-ethanol (L1–H) and 2-(6-methyl-2-pyridinyl)-1,1-diphenyl-1-ethanol (L2–H) have been prepared by treatment of acetone and benzophenone with monolithiated 2,6-lutidine. Deprotonolysis of the ligands L1–H and L2–H with 1 equiv of MgnBu2 and ZnEt2 in toluene by relea...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11991.html
 
Facile synthesis of fluorescent dye labeled biocompatible polymers via immortal ring-opening polymerization
A highly efficient strategy for synthesizing ‘‘clean’’ fluorescent dye-labeled biocompatible polymers was established by employing a rare-earth metal catalyst via immortal ROP.
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11959.html
 
Ligand-Free Magnesium Catalyst System: Immortal Polymerization of L-Lactide with High Catalyst Efficiency and Structure of Active Intermediates
A simple, inexpensive, and convenient catalyst system consisting of supporting ligand-free MgnBu2 in combination with an alcohol, isopropanol (iPrOH), benzyl methanol (PhCH2OH), diphenylmethanol (Ph2CHOH), or triphenylmethanol (Ph3COH), generates a convenient catalyst system to promote the polymerization of l-LA. In particular, the binary system MgnBu2/Ph2CHOH demonstrates an unprecede...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11917.html
 
Facile Synthesis of Hydroxyl-Ended, Highly Stereoregular, Star-Shaped Poly(lactide) from Immortal ROP of rac-Lactide and Kinetics Study
Triethanolamine (TEA) reacted with 3 equiv of yttrium alkyl complex 1 bearing O,N,N,Otetradentate Salan ligand to give a trinuclear yttrium alkoxide counterpart 2 via metathesis reaction. Complex 2 initiated the ring-opening polymerization of rac-lactide in a livingness mode under mild conditions. Remarkably, 2 was so tolerant of the protic TEA that under various TEA-to-yttrium molar ratios rang...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11969.html
 
Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ
Catalyst systems obtained from the inexpensive, ligand-free and commercially available MgnBu2 and alcohols were used for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) under mild conditions. The catalytic system of MgnBu2/Ph2CHOH showed very high activity as compared with the system of MgnBu2/Ph3COH, which applied a more bulky methanol derivative. Interestingly, in the pre...
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11912.html
 
Facile synthesis of pendant- and alpha,omega-chain-end-functionalized polycarbonates via immortal polymerization by using a salan lutetium alkyl precursor
A highly efficient strategy for synthesizing functionalized polycarbonates was established by employing a rare-earth metal catalyst.
http://www.stageastar.comt//ss/dongmeicui/publicationsshow_11888.html
 
 
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