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Synthesis, Photophysics and Morphology of a Conjugated Polymer with Azobenzene Building Block in the Backbone
A conjugate polymer poly[p-(phenyleneethylene)-alt-(phenyleneazophenyleneethylene)] (PPEPAPE) containing azobenzene building block in the polymer backbone was synthesized via Sonogashira cross-coupling of 4,4'-diiodoazobenzene and 1,4-diethynyl-2,5-didodecyloxybenzene. All the monomers and the resulting polymer were well characterized. The polymer had a relatively high molecular weight and showed ...
http://www.polymer.cnt//ss/fanlijuan/publicationsshow_3308.html |
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Composite Thin Film by Hydrogen-Bonding Assembly of Polymer Brush and Poly(vinylpyrrolidone)
Based on hydrogen-bonding layer-by-layer (LBL) assembly in aqueous solution, poly(vinylpyrrolidone) (PVPON) and a spherical polymer brush with a poly(methylsilsesquioxane) (PSQ) core and poly(acrylic acid) (PAA) hair chains were used to fabricate composite multilayer thin films. Hydrogen bonding as the driving force was confirmed by FT-IR spectrometry. A simple method (Filmetric F20) was introduce...
http://www.polymer.cnt//ss/zhangyongjun/publicationsshow_3303.html |
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Covalent Cross-Linked Polymer/Single-Wall Carbon Nanotube Multilayer Films
Layer-by-layer films have been constructed from a cationic diazoresin and poly(sodium 4-styrene-sulfonate)-functionalized single-wall carbon nanotubes (SWNT). Raman and near-IR absorption spectra indicate that some diazonium ions reacted with SWNT during film construction. The ionic bonds in the film between diazonium ions and sulfonate ions converted to covalent bonds upon UV irradiation as shown...
http://www.polymer.cnt//ss/zhangyongjun/publicationsshow_3301.html |
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Biodegradable polymer microcapsules fabrication through a template-free approach
Biodegradable polymer microcapsules fabrication through a template-free approach
http://www.polymer.cnt//ss/jintaozhu/publicationsshow_3224.html |
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Crystallization behaviors of poly(ethylene 2,6-naphthalate) in the presence of liquid crystalline polymer
The crystallization behaviors and morphology of poly(ethylene 2,6-naphthalate) (PEN) in the presence of liquid crystalline polymer (LCP) Vectra RD501 have been studied by differential scanning calorimetry (DSC), polarized optical microscopy (POM), atomic force microscopy (AFM), and wide-angle X-ray diffraction (WAXD). It was found that the LCP in PEN/LCP blends accelerates the crystallization ...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3139.html |
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79. Labyrinthine pattern of polymer crystals from supercooled ultrathin films
We report the observation of a labyrinthine crystal pattern with a periodic structure in the crystal width direction in ultrathin films of poly(ethylene oxide) fractions with molecular weight ranging from 25,000 to 932,000 g/mol. The polymer thin films are crystallized at temperatures well below the bulk melting temperature, thus the system is characterized by limited diffusion of the po...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3110.html |
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73. Synthesis of Polyoxometalate-Polymer Hybrid Polymers and Their Hybrid Vesicular Assembly
An organic−inorganic hybrid polymer composed of a Dawson trivanadium-substituted heteropolytungstate ((Bu4N)5[H4P2W15V3O62]) cluster and PS chain are originally designed and first synthesized via in situ ATRP. Further characterization includes NMR spectroscopy, FT-IR spectroscopy, and GPC which proved the purity of the material. By means of a cation exchange process, a hybrid polymer (Bu...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3104.html |
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31. Experimental study of dynamics of topological defects in nematic polymer liquid crystals
The dynamics of stringlike defects and the shrinkage and annihilation processes of individual defect loops in a nematic polymer liquid crystal have been experimentally investigated. In 40<t<500?s, the line density of defects ρ scales as ρ(t) ∼ t−1, as expected by theory and as found in the experimental studies of some low molecular weight (LMW) liquid crystals. For indi...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3057.html |
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[Small] Dynamic Microcontact Printing for Patterning Polymer-Brush Microstructures
A single, conventional poly(dimethylsiloxane) (PDMS) stamp is used under a dynamic microcontact printing (uCP) method, extended from a static one. This new approach is investigated and combined with surface-initiated atom-transfer radical polymerization
(SI-ATRP) to fabricate complex patterned hierarchical and gradient polymer-brush
microstructures with a number of different feature morphologi...
http://www.polymer.cnt//ss/chentaogroup/publicationsshow_2982.html |
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Effect of PHBV content on the transparency and swelling behavior of polymer/hectorite nanocomposite hydrogel
As a kind of novel biopolymer material with good biodegradability and biocompatibility, poly(β-hydroxybutyrate-co-valerate)(PHBV) was introduced into organic/inorganic network structure of nanocomposite hydrogels prepared by in-situ free-radical polymerization based on monomer Nisopropylacrylamide(
NIPAM) and physical cross-linker hectorite. As viewed from appearance of the
hydrogels, obvio...
http://www.polymer.cnt//ss/tjzqs/publicationsshow_2942.html |
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