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Ring-Opening Polymerization of Propylene Oxide Catalyzed by a Calcium-Chloride-Modified Zinc-Cobalt Double Metal-Cyanide Complex
Highly active CaCl2-modified Zn-Co(III) DMCs were prepared. XRD results showed that the modified catalyst Ca-DMC containing 0.14 wt.-% CaCl2 was amorphous. A higher polymer yield (>61 kg polymer/g catalyst) and a shorter induction period for ROP of PO were observed for Ca-DMC than for unmodified DMC catalysts. An initiator had an inhibitory effect on the initiation and polymerization rate of ...
http://www.polymer.cnt//ss/xhzhang/publicationsshow_5706.html |
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Selective copolymerization of carbon dioxide with propylene oxide catalyzed by a nanolamellar double metal cyanide complex catalyst at low polymerization temperatures
Traditional cobalt-zinc double metal cyanide complex [Zn-Co(III)DMCC] catalysts could catalyze the copolymerization of carbon dioxide (CO2) with propylene oxide (PO) to afford poly (propylene carbonate) (PPC) with high productivity. But the molecular weight (MW) of PPC and the polycarbonate selectivity were not satisfied. In this work, by using a nanolamellar Zn-Co(III) DMCC catalyst, the CO2-PO c...
http://www.polymer.cnt//ss/xhzhang/publicationsshow_5700.html |
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Highly Regioselective and Alternating Copolymerization of Racemic Styrene Oxide and Carbon Dioxide via Heterogeneous Double Metal Cyanide Complex Catalyst
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http://www.polymer.cnt//ss/xhzhang/publicationsshow_5563.html |
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Improving the flame retardancy and mechanical properties of high density polyethylene-g-maleic anhydride with an organic metal phosphonate
Zinc N,N’-Piperazinebis(methylenephosphonic acid) (PPMPA-Zn) was melt blended with high density polyethylene-g-maleic anhydride (HDPE-MA) to fabricate flame retardant HDPE-MA/PPMPA-Zn composites. The thermal stability and flame retardancy of the composites were investigated by thermogravimetric analysis (TGA) and cone calorimetry. Incorporation of PPMPA-Zn did not obviously increase the ther...
http://www.polymer.cnt//ss/zpfang/publicationsshow_4864.html |
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102. Post-Functionalization of an Anderson-Type Polyoxomolybdate Using a Metal-Free Diels–Alder Click Reaction
Functionalization and post-functionalization of polyoxometalates (POMs) by organic groups or biological moieties can provide versatile platforms for creating novel functional hybrids with synergetic properties. Such materials can easily be envisioned as having many advanced applications in biology and materials science. Nowadays, the organic groups or biological moieties used for conjugation with ...
http://www.polymer.cnt//ss/wangwei/publicationsshow_4628.html |
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Effects of Rare Earth Metal Triflates on Cationic Curing of Epoxy Resin/Polyamide Systems
In this article, a new class of cationic initiators, lanthanide triflates, has been studied in the cationic curing of epoxy resin, diglycidyl ether biphenyl A (DGEBA), and polyamide (PA) mixtures. The reaction mechanism of the cationic curing of DGEBA/PA mixtures has been studied. The kinetics of this process has been evaluated by the Differential Scanning Calorimetry (DSC). The effect of the time...
http://www.polymer.cnt//ss/caizhiqi/publicationsshow_4162.html |
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Stretching-Controlled Micromolding Process with Etched Metal Surfaces as Templates Towards Mass-Producing Superhydrophobic Polymer Films
A novel technique is described that uses stretching-controlled thermal micromolding with etched metal surfaces as templates for the mass-production of superhydrophobic polymer films. First, the metal surface is etched and then used as a template to thermally replica-mold the polymer (e.g., polyethylene). The resulting film surfaces exhibited stable superhydrophobicity with water contact angles >...
http://www.polymer.cnt//ss/fengjie/publicationsshow_4072.html |
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Synthesis of noble metal nanoparticles embedded in the shell layer of core-shell poly(styrene-co-4-vinylpyridine) micospheres and their application in catalysis
pubs.acs.org/doi/abs/10.1021/cm703378c
The noble metal nanoparticles of Pd, Au, and Ag embedded in the shell layer of core−shell poly(styrene-co-4-vinylpyridine) micospheres were synthesized, and the catalytic activity of the shell-embedded Pd nanoparticles was investigated. To increase the accessible active site and therefore increase the catalytic activity of noble metal nanoparticles, th...
http://www.polymer.cnt//ss/zhangwangqing/publicationsshow_4034.html |
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Nano Lett., 2012, 12, 5033-5038: Highly Porous Metal Oxide Networks of Interconnected Nanotubes by Atomic Layer Deposition
Mesoporous metal oxide networks composed of interconnected nanotubes with ultrathin tube walls down to 3 nm and high porosity up to 90% were fabricated by atomic layer deposition (ALD) of alumina or titania onto templates of swelling-induced porous block copolymers. The nanotube networks possessed dual sets of interconnected pores separated by the tube wall whose thickness could be finely tuned by...
http://www.polymer.cnt//ss/dreiwang/publicationsshow_3916.html |
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[J. Am. Chem. Soc.] Surface-Initiated Group Transfer Polymerization (SI-GTP) Mediated by Rare Earth Metal Catalysts
We present the first example of a surfaceinitiated group transfer polymerization (SI-GTP) mediated by rare earth metal catalysts for polymer brush synthesis. The experimentally facile method allows rapid grafting of polymer brushes with a thickness of >150 nm in <5 min at room temperature. We show the preparation of common
poly(methacrylate) brushes and demonstrate that SI-GTP is a versati...
http://www.polymer.cnt//ss/zhang_ning/publicationsshow_3799.html |
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