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Spherical mesoporous silica nanoparticles/tailor-made polystyrene nanocomposites by in situ reverse atom transfer radical polymerization
Pleiades Publishing Ltd - Tập 56 - Trang 909-918 - 2014
Khezrollah Khezri, Hossein Roghani-Mamaqani, Mohammadreza Sarsabili, Masoud Sobani, Seyed-Ataollah Mirshafiei-Langari
Spherical mesoporous silica nanoparticles (MCM-41)/tailor-made polystyrene nanocomposites were synthesized by in situ reverse atom transfer radical polymerization. Characteristics of spherical MCM-41 nanoparticles were evaluated by nitrogen adsorption/desorption isotherm and X-ray diffraction. Morphological studies were also performed by scanning and transmission electron microscopy. Conversion an...... hiện toàn bộ
Complexes of Polyethyleneimine with Cu2+ Ions in Aqueous Solutions as Precursors for Obtaining Copper Nanoparticles
Pleiades Publishing Ltd - Tập 61 - Trang 261-265 - 2019
D. R. Ustyakina, A. S. Chevtaev, A. I. Tabunshchikov, A. S. Ozerin, F. S. Radchenko, I. A. Novakov
The regularities of the formation of a polyethyleneimine complex with copper ions in aqueous solutions have been studied. It has been shown that the complex of polyethylenimine with copper ions is formed according to the principle of uniform distribution of ions over a macromolecule, and the composition of the complex may vary depending on the molar ratio of reagents and pH of the medium. The synt...... hiện toàn bộ
Polymerization of higher α-olefins with the catalytic system (4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-bis(perfluorophenyldimethanolate) titanium(IV) dichloride-organoaluminum compound
Pleiades Publishing Ltd - Tập 53 - Trang 299-306 - 2011
S. Ch. Gagieva, V. A. Tuskaev, O. V. Smirnova, S. S. Galibeev, B. M. Bulychev, N. M. Bravaya
The catalytic activity of the titanium(IV) dichloride complex with the (4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-bis(perfluorophenyldimethanol) ligand in the presence of a cocatalyst (polymethylaluminoxane, triethylaluminum, or triisobutylaluminum) in the polymerization of higher α-olefins (1-hexene, 1-octene, 1-decene) is investigated. It is shown that, depending on the types of cocatalyst and monom...... hiện toàn bộ
Reversible addition-fragmentation chain-transfer polymerization: Fundamentals and use in practice
Pleiades Publishing Ltd - Tập 59 Số 2 - Trang 117-146 - 2017
Е. В. Черникова, E. V. Sivtsov
Single-stage synthesis of phosphazene-containing epoxy oligomers
Pleiades Publishing Ltd - Tập 56 - Trang 471-476 - 2014
I. S. Sirotin, Yu. V. Bilichenko, K. A. Brigadnov, V. V. Kireev, B. M. Prudskov, R. S. Borisov
A single-stage synthesis of phosphazene-containing epoxy oligomers via the direct interaction of hexachlorocyclotriphosphazene, diphenylolpropane and epichlorohydrin has been proposed. The resulting products are composed of a common epoxy-diane oligomer and an epoxyphosphazene component, with the content of the latter being up to 45 wt %. Oligomers with epoxy numbers up to 22 were characterized wi...... hiện toàn bộ
Topochemical aspects of elementary reactions of the emulsion polymerization of acrylonitrile
Pleiades Publishing Ltd - Tập 52 - Trang 381-390 - 2010
N. M. Bol’bit, E. A. Dubova, V. R. Duflot
A combination of statistic and kinetic methods of analysis is used to collect quantitative data on the kinetics of elementary reactions of growth and termination of kinetic chains in each phase of a heterophase system as well as on interfacial mass exchange at the quasistationary stage of radiation-induced emulsion polymerization of acrylonitrile. It is found that, in the system, a steady-state co...... hiện toàn bộ
Development of an Electrospun Scaffold for Retinal Tissue Engineering
Pleiades Publishing Ltd - Tập 62 - Trang 290-298 - 2020
Fatemeh Jafari, Saied Nouri Khorasani, Farzaneh Alihosseini, Dariush Semnani, Shahla Khalili, Rasoul Esmaeely Neisiany
Delivery of retinal progenitor cells (RPCs) for restoring injured or diseased retinal tissue using biodegradable scaffolds is a promising treatment for retinal diseases. Blend of three polymers; poly(ε-caprolactone) (PCL), poly(glycerol sebacate) (PGS), and poly(1,8-octanediol-co-citrate) (POC) was used to prepare a nanofibrous scaffold for retinal tissue engineering via electrospinning process. T...... hiện toàn bộ
Synthesis and Characterization of Schottky Diodes from Polyaniline Doped with Trifluoroacetic Acid
Pleiades Publishing Ltd - Tập 63 - Trang 502-513 - 2021
Aissat Fares, Nacira Naar, Saad Lamouri
In this paper we report the fabrication of Schottky barriers using polyaniline (PANI) doped with trifluoroacetic acid (TFA). The PANI doped with TFA (PANI-TFA) was prepared by chemical oxidative polymerization using an indirect synthetic route known as doping-dedoping-redoping. The structural, morphological, optical and thermal properties of the obtained doped polyaniline (PANI-TFA) were studied b...... hiện toàn bộ
Optical Properties, Antibacterial Activity, and Relaxation Behavior Investigation of Chitosan/Green Synthesized Silver Nanoparticles by Thermally Stimulated Depolarization Current Technique
Pleiades Publishing Ltd - Tập 63 Số 5 - Trang 578-590 - 2021
Sarhan, A., Fahmy, T.
Chitosan/green synthesized silver nanoparticles have been prepared electrochemically in one compartment electrochemical cell under nitrogen gas pressure. The analysis of UV–Vis spectroscopy of Cs/AgNPs revealed that chitosan is characterized by a shoulder centered at 250 nm and an absorption peak at 304 nm attributed to n → π* and π → π* transition of C=O. On the other hand, Cs/AgNPs spectrum show...... hiện toàn bộ
Sisal fibers coated with conducting polyaniline: Property and structural studies
Pleiades Publishing Ltd - - 2017
Tesfamariam Teklu, Lodrick Makokha Wangatia, Esayas Alemayehu
Tổng số: 1,009   
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