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15篇 您的检索式:作者名="HOLGER FREY"
    题名 作者 年代 出处 被引量
1Control of the molecular weight of hyperbranched polyglycerols 显示文摘Holger Kautz Alexander Sunder Holger Frey 2001Macromolecular Symposia2001,163,1:2
2Amphiphiliclinear-hyperbranched block copolymers with linear poly ( ethyleneoxide) and hyperbranched poly ( carbosilane ) block 显示文摘Frederik Wurm Hanna Schu le Holger Frey 2008Macromolecules2008,41,96:1
3Hyperbranched polymers prepared via the core-dilution/low addition technique: computer simulation of molecular weight distribution and degree of branching显示文摘Ralf Hanselmann Dirk Holter Holger Frey 1998Macromolecules1998,31,:1
4Hyper- branched polymers prepared via core - dilution/slow addition tech- nique : Computer simulation of molecular weight distribution and de- gree of branching 显示文摘RALF HANSELMAN DIRK HOLTER HOLGER FREY 1998Maeromoleeules1998,31,12:1
5Rainer hagg dendritische polymere fur medizinische anwendungen: auf dem weg zum einsatz in diagnostik und therapie显示文摘Salah-Eddine Stiriba Holger Frey 2002Angew Chem Int Ed2002,41,8:1
6Grafting of hyperbranched polymers:From unusual comp|ex polymer topologies to multivalent surface functionalization 显示文摘Christoph Schtlll Holger Frey 2013Polymer2013,54,:1
7Controlled synthesis of hyperbranched polyglycerols by ring-opening multibranching polymerization 显示文摘Alexander Sunder Ralf Hanselmann Holger Frey 1999Macromolecules1999,32,13:1
8Aliphatic hyperbranched copolyesters by combination of ROP and AB2-polycondensation显示文摘Smet Mario Gottschalk Casten Skaria Sunny Frey Holger 2005Macromolecular Chemistry and Physics2005,206,:1
9Controlled synthesis of lin- ear polymers with highly branched side chains by 'hyper- grafting' : poly ( 4-hydroxy styrene )-grafthyperbranched polyglycerol显示文摘Schiill Christoph Frey Holger 2012Macro Lett2012,1,:1
10Optically active amphiphilic hyperbranched polyglycerols as tem- plates for palladium nanoparticles 显示文摘Chen Yu Holger Frey Ralf Thomann 2006Inorganica Chimica Acta2006,359,:1
11Hyperbranched polymers prepared via the core - dilution/low addition technique: computer simulation of molecular weight distribution and degree of branching 显示文摘RALF HANSELMANN DIRK HOLTER HOLGER FREY 1998Macromolecules1998,,31:1
12Rapid access to polyfunctional lipids with complex architecture via oxyanionic ring-opening polymerization显示文摘Hofmann Anna Maria Wurm Frederik Frey Holger 2011Macromolecules2011,44,:1
13Molecular nanocapsules based on amphiphilic hyperbranched polyglycerols显示文摘Alexander Sunder Michael Kramer Holger Frey 1999Angew Chem Int Ed1999,38,23:1
14Synthesis and thermal behavior of esterified aliphatic hyperbranched polyether polyols显示文摘Alexander Sunder Thorsten Bauer Holger Frey 2000Macromolecules2000,33,4:1
15Monomer-activated Copolymerization of Ethylene Oxide and Epichlorohydrin: In Situ Kinetics Evidences Tapered Block Copolymer Formation显示文摘The monomer-activated anionic ring-opening copolymerization (AROP) of ethylene oxide (EO) and epichlorohydrin (ECH) using tetraoctylammonium bromide as an initiator and triisobutylaluminum (i-Bu3Al) as an activator was studied. The properties of the copolymers as well as the microstructure have been analyzed in detail via an in situ NMR kinetics study. The statistical copolymers exhibited molecular weights ranging from 2350 g·mol^-1 to 38000 g·mol^-1 (measured by SEC, PEG-standards) and moderate dispersities of 1.27-1.44. The thermal property tests revealed both a glass transition and melting for all copolymers, supporting a block-like nature. Applying in situ NMR kinetic measurements, the reactivity ratios of EO and ECH were determined to be strongly disparate, i.e., rEo = 9.2 and rECH = 0.10. This shows that the simple one-pot statistical anionic copolymerization of EO and ECH via the monomer-activated AROP resulted in the formation of strongly tapered, block-like structures. Furthermore, post-polymerization functionalization of the reactive chloromethyl groups by nucleophilic displacement was investigated for the copolymers. Copolymerization of EO and ECH offers a broad platform for further functionalization and therefore the possibility to prepare a variety of multifunctional PEGs.Ann-Kathrin Danner Daniel Leibig Lea-Marie Vogt Holger Frey 2019Chinese Journal of Polymer Science2019,37,9:0
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