Multi-walled carbon nanotubes and graphite nanoplatelets were functionalized via acid treatment to overcome the problem of agglomeration. Fourier transform infrared spectroscopy showed the chemical modification of the nanocarbons while the general relationship between the chemical treatment and the defects population was analyzed by Raman spectroscopy. The information regarding the mass loss and impurities is obtained from the thermogravimetric analysis. X-ray diffraction showed the effect of acid treatment on the physical states of the nanocarbons including the crystalline texture.
Hydrosilylation reactions of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3,4,4,5,5-octafluoropentyl acrylate at 1:4.2 ratio of initial compounds catalysed by platinum catalysts have been studied and corresponding adduct D4R' has been obtained. Ring opening polymerization of D4R in the presence of dry potassium hydroxide has been carried out and comb-type polymers with 2,2,3,3,4,4,5,5-octafluoropentyl propionate side groups have been obtained.
The method of obtaining phosphorus-containing polyester by the Steglich reaction is considered. The results of studies on the production of polyesteresters using ethyl phosphate group in the structure of dipolyethyleneglycolethylphosphate are presented. The obtained polymer was characterized by IR and 1H NMR spectroscopy. The composition of polyester ether was evaluated and its end groups were analyzed.
The hydrosilylation reaction of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3-tetrafluoropropyl acrylate and vinyltriethoxysilane in the presence of platinum catalysts (platinum hydrochloric acid, Karstedt’s catalysts and Pt/C (10%) at 323 K) has been carried out and corresponding addition adduct (D4R,R‘) has been obtained. The synthesized product D4R,R was analyzed by FT-IR, 1H, 13C, and 29Si NMR spectroscopy.
Hydrosilylation reaction of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetra siloxane (D4H) allyl trifluoroacetate and vinyltriethoxysilane catalysed by platinum catalysts has been studied.The synthesized D4R,R' was analyzed with FTIR, 1H, 13C, and 29Si NMR spectroscopy. Via sol-gel reactions of D4R,R' systems doped with lithium trifluoromethylsulfonate (triflate) solid polymer electrolyte membranes have been obtained. It has been found that the electric conductivity of the polymer electrolyte membranes at room temperature changes in the range of (4•10-5)–(6•10-7) S/cm.
This article provides an analysis of modern methods of spectroscopy in medicine, examined their classification. Conducted a review of portable spectroscopic systems, analysis of the advantages and disadvantages of their use. Analysis of components for spectroscopic analysis. Review of methods of the spectrum classification. Brought a conceptual diagram of processing the received data and its classification. Review of applications portable spectroscopic systems.
This article provides the comparison of libraries neural networks. Based on this analysis was determined to develop a neural network for classification of spectra based on Encog library, because it implemented many components and gives the best result with a small number of items for training. Showed the architecture of neural networks for data classification of spectral analysis.
Inherently conducting polymer polyaniline (Pani) has been synthesized by a novel interfacial polymerization technique using trichloroethane as organic media. Ammonium peroxydisulphate was used as an oxidizing agent dissolved in aqueous media. The synthesized polymer was subjected to the physico-chemical characterization by UV-Vis and FT-IR Spectroscopy and Scanning Electron Microscopy. From the SEM Micrographs it was observed that interfacial polymerization offers the fibrillar type of morphology having 200 nm sized fibers.
A new series of methyl 4,6-O-(4-methoxybenzylidene)--D-glucopyranoside derivatives was synthesized using the direct acylation method. Methyl--D-glucopyranoside was selectively converted to methyl 4,6-O-(4-methoxybenzylidene)--D-glucopyranoside by the reaction with 4-methoxybenzaldehyde dimethylacetal in a reasonable yield. Using a wide variety of acylating agents, a series of 2,3-di-O-acyl derivatives of this product was also prepared in order to gather additional information for structure elucidation.