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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.polymer.cnt//ss/dongmeicui/publicationsshow_11917.html |
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16. Submicrometer-Sized Rubber Particles as ‘‘Craze-Bridge’’ for Toughening Polystyrene/High-Impact Polystyrene
Submicrometer core-shell polybutadiene-graft-polystyrene (PB-g-PS) copolymers were synthesized by emulsion grafting polymerization with 1,2-azobisisobutyronitrile as an initiator. Then, PB-g-PS copolymers were blended with high-impact polystyrene (HIPS) and PS to prepare HIPS/PS/PB-g-PS. It is generally accepted that PS could only be toughened by 1–3-lm rubber particles effe...
http://www.polymer.cnt//ss/ghgao/publicationsshow_11897.html |
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【J. Phys. Chem. C】Tunable Permittivity in High–Performance Hyperbranched Polyimide Films by Adjusting Backbone Rigidity
Currently, low-dielectric polyimides (PIs) such as fluorinated or porous PIs exhibit a low-dielectric property but have undesirable mechanical and/or thermal properties. Therefore, it is crucial to find a more considerate method that could lower the permittivity, while maintaining or improving the mechanical and thermal properties. Herein, a series of hyperbranched (HB) PI films were synthes...
http://www.polymer.cnt//ss/zhangqiuyu/publicationsshow_11796.html |
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Novel synthesis and high visible light photocatalytic activity of SnS(2) nanoflakes from SnCl(2)center dot 2H(2)O and S powders
A novel method based on heating the mixture of SnCl2·2H2O and excess S powders in air at 200–240 °C for 0–10 h (t = 0 h, that is, the heating of the reactants was stopped immediately once temperature reached the designed degree), coupled with a subsequent washing treatment, was proposed for the synthesis of SnS2 nanoflakes. X-ray diffraction, transmission el...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10636.html |
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High-Performance Visible-Light-Driven SnS(2)/SnO(2) Nanocomposite Photocatalyst Prepared via In situ Hydrothermal Oxidation of SnS(2) Nanoparticles
SnS2/SnO2 nanocomposites with tunable SnO2 contents were prepared via in situ hydrothermal oxidation of SnS2 nanoparticles in 0.375–4.5 mass% H2O2 aqueous solutions at 180 °C for 0–12 h. The structure, composition and optical properties of the as-prepared SnS2/SnO2nanocomposites were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transm...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10602.html |
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Size-controlled hydrothermal synthesis of SnS(2) nanoparticles with high performance in visible light-driven photocatalytic degradation of aqueous methyl orange
A simple hydrothermal method was developed for the size-controlled synthesis of SnS2nanoparticles, using common and inexpensive SnCl4·5H2O and thioacetamide as the reactants and 5 vol.% acetic acid aqueous solution as the solvent. The structure, composition and optical property of the obtained products were characterized by X-ray diffraction, transmission electron microscopy, energy ...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10596.html |
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Hydrothermal synthesis of SnO(2)/SnS(2) nanocomposite with high visible light-driven photocatalytic activity
SnO2/SnS2 nanocomposite with a heterojunction structure (that is, SnO2 nanoparticles-decorated SnS2 nanoplates) was synthesized via the hydrothermal reaction between SnO2nanoparticles and thioacetamide in 5 vol.% acetic acid aqueous solution at 150 °C for 3 h, and characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission elect...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10592.html |
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Size-Tunable Hydrothermal Synthesis of SnS(2) Nanocrystals with High Performance in Visible Light-Driven Photocatalytic Reduction of Aqueous Cr(VI)
SnS2 nanocrystals with adjustable sizes were synthesized via a hydrothermal method from the aqueous solution of common and inexpensive SnCl4·5H2O, thioacetamide and citric acid, simply by varying the reaction temperature and reaction time. The structures, Brunauer–Emmett–Teller (BET) specific surface areas and optical properties of the resultant SnS2 nanocrystals were characteri...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10590.html |
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Improvement of photocatalytic activity of high specific surface area graphitic carbon nitride by loading a co-catalyst
Graphitic carbon nitride (g-C3N4) was synthesized by heating melamine and was then treated with sodium hydroxide solution under a hydrothermal condition to obtain g-C3N4 with a large specific surface area (HSSA). HSSA shows higher photocatalytic activity for decomposition of acetaldehyde than that of original g-C3N4. HSSA was modified with RuO2 as a co-catalyst by the impregnation method...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10545.html |
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A facile one-pot route for preparing cellulose nanocrystal/zinc oxide nanohybrids with high antibacterial and photocatalytic activity
Cellulose nanocrystal/zinc oxide (CNC/ZnO) nanohybrids were prepared through citric acid/hydrochloric acid hydrolysis of commercial microcrystalline cellulose (MCC), and simple precipitation with zinc nitrate aqueous solution [Zn(NO3)2·6H2O] via one-pot green synthesis, in which preparation and modification of CNCs were performed simultaneously and the obtained CNCs with carboxyl groups cou...
http://www.polymer.cnt//ss/yuhouyong/publicationsshow_10518.html |
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