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Online since: July 2012
Authors: Xiang Wen Kong, Xiao Pu Liu, En Tao Zhou, Jing Zhang
The structure of all the products was confirmed by their melting points, spectral data (IR, 1H-NMR).
From the analysis of the spectra, the IR spectral data was in good accordance with the given structure.
From the analysis of the spectra, we deduced that formylation reaction happened completely, and the product was the anticipated structure.
Products were at a high purity, and their structures were in conformity with the anticipated structures.
Huang: European Journal of Medicinal Chemistry Vol. 39 No. 6 (2004), p. 547-553 [2] Baowen Zhang, Changqi Ma, Xuesong Wang and Yi Cao, C.N.
Online since: January 2013
Authors: Qiu Feng An, Bo Xiao, Xia Meng Xv, Li Fen Hao
The chemical structure of QBPEAS was characterized by IR and 1H-NMR.
The structures and surface morphologies were characterized by IR, 1H-NMR, TEM, SEM, etc..
The molecular structure can influence the film morphology.
In a short, all of the above results indicate that molecule has the due structure.
Journal of Polymer Science: Part A: Polymer Chemistry, 2002, 40: 3570-3578 [2] J.
Online since: March 2022
Authors: Ashvin N. Prajapati, Shivani P. Patel, V.A. Rana, H.P. Vankar
This indicates the formation of small structures due to breaking of chain like structures of n-Butanol in the mixtures.
Also the systematic increase in the relaxation time indicates that the formation of small structures is concentration dependent.
Molecules of mixture may form multimers structures via hydrogen bonding in such a way that the effective dipole gets reduced.
Mehrotra, Dielectric study of methyl methacrylate-alcohol mixtures by Time Domain Reflectometry at 293K, Main Group Chemistry. 4 (2005) 235-240
Kister, Algebraic representation of thermodynamic properties and the classification of solutions, Industrial& Engineering Chemistry, 40 (1948) 345–348.
Online since: July 2015
Authors: Yusuke Morita, Marleen de Weser, Gerhard Schottner
A Computational Chemistry Approach for Investigation of Low Friction Mechanisms based on FEP Film with Functionalized SiO2 Nanoparticles Yusuke Morita1, a, Marleen De Weser1, b and Gerhard Schottner2, c 1TOYOTA MOTOR EUROPE, Belgium 2Fraunhofer ISC, Germany aYusuke.Morita@toyota-europe.com, bMarleen.De.Weser@toyota-europe.com cGerhard.schottner@isc.fraunhofer.de Keywords: friction reduction, SiO2 nanoparticle, functionalization, molecular dynamics, quantum chemical calculation.
In order to achieve the desired low friction property by functionalization of the nanoparticles, atomic scale investigations such as surface structure and its property optimizations are necessary.
Application of computational chemistry methods is an effective way to analyze atomic-scale properties and to optimize the surface structure in order to customize its properties.
The QC coefficients have been adjusted to reproduce the binding energies and electronic structures of each reactant calculated by the first-principle parameterization.
Online since: May 2021
Authors: Eduard Pogorel’tsev, Valeriy Senichev, Aleksey Slobodinyuk, Dmitriy Kiselkov, Marina Makarova
An Effect of Fillers on the Structure and Abrasive Wear of Polyurethane Urea Valeriy Senichev1,a, Eduard Pogorel’tsev1,b*, Aleksey Slobodinyuk1,c, Dmitriy Kiselkov1,d and Marina Makarova1,e 1Institute of Technical Chemistry of Ural branch of Russian Academy of Sciences, 3 Akad.
The aim of this work is to study the effect of fillers on the structure and mechanism of abrasive wear of polyurethane urea elastomers.
The effect obtained can be associated with the negative effect of filler addition on the supramolecular structure of the samples.
From a chemical point of view, the process of abrasive wear of a polymer is accompanied by processes of mechanical destruction, related with certain changes in the chemical structure of polymer chains and in the supramolecular structure as well.
This indicates the destruction of supramolecular structures containing ordered linked C=O groups in urea fragments.
Online since: April 2005
Authors: Steven Verhaverbeke, Roman Gouk, Dennis Yost
Increasing the number of cleaning cycles contributes to additional cycle time, cumulative silicon and oxide loss, and damage to fragile structures.
Effects of Chemistry on Cavitation The chemistry being used has an effect on cavitation.
Online since: December 2014
Authors: Mao Fang Huang, Yong Zhou Wang, Bei Long Zhang
CVNR is prepared with the same natural rubber latex and the same production method of coagulating and processing as that of NR, so the molecular structures of CVNB and NR are similar.
Rubber Chemistry and Technology, 67(1994), p314
Rubber Chemistry and Technology, 61(1988), p340.
Online since: February 2014
Authors: Nur Amira Mamat Razali, Nurul Aimi Mohd Zainul Abidin, Fauziah Abdul Aziz, Noriean Azraaie, Sarani Zakaria, Nur Ain Ibrahim
Photan, and Deepa, in: Natural Fibres: Structure, Properties and Applications, edited by S.
Quaiyyum: Cellulose Chemistry and Technology 45(5-6), (2011), p. 347-354
Kamdem: Cellulose Chemistry and Technology 43(7-8), (2009), p. 229-234
Online since: September 2013
Authors: Mei Xia Guo, Yuan Yuan Zhang, Zhi Ying Wang, Wen Zhan Zhang, Shou Hong Xue
A Study of Performance on Anti-Pollution Flashover Coating Based on Composite Room Temperature Vulcanized Silicone Rubber Meixia Guo1,a, Shouhong Xue*2,b, Yuanyuan Zhang3,c, Zhiying Wang4d, Wenzhan Zhang5c 1College of Chemistry and Engineering, Inner Mongolia University, Hohhot , China. 2Inner Mongolia Electric Power Science Research Institute, Hohhot, China. 3College of Chemistry and Engineering, Inner Mongolia University.
According to GB/T1763, the RTV which add PTFE acid-proof alkaline experiment was carried out.The RTV with PTFE and without PTFE re The RTV with PTFE and without PTFE respectively soak in 3%, 6%, 9%, 12% NaOH, Corrosion situation is shown in figure 4 and figure 5 spectively soak in 3%, 6%, 9%, 12% H2SO4, corrosion situation is shown in figure 2 and figure 3. 3% H2SO4 6% H2SO4 9% H2SO4 12% H2SO4 Fig.2 The RTV without PTFE 3% H2SO4 6% H2SO4 9% H2SO4 12% H2SO4 Fig.3 The RTV with PTFE 3% NaOH 6% NaOH 9% NaOH 12% NaOH Fig.4 The RTV without PTFE 3% NaOH 6% NaOH 9% NaOH 12% NaOH Fig.5 The RTV with PTFE As the acid and alkali concentration increased, the physical structure of RTV which without PTFE is changed significantly and the sample surface produces a lot of physical defects, the degree of surface defects associated with the acid
Online since: April 2011
Authors: Valdis Valters, Linda Lancere, Natalie Polyaka, Aleksander Sudnikovich, Fyodor Tyulkin, Yuri Dekhtyar
Further experiments should include relaxation in time of PMMA material, material stability, possibly chemical structure analysis.
Guven, in: UV degradation of poly(methyl methacrylate) and its vinyltriethoxysilane containing copolymers, Department of Chemistry, Faculty of Art and Science, Gazi University, Hacettepe University, Ankara, Turkey, 225-229, (1999)
Physics, Mechanics, Chemistry.