The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform
Andrew M. Rappe - One of the best experts on this subject based on the ideXlab platform.
-
Self-initiation mechanism in spontaneous Thermal Polymerization of ethyl and n-butyl acrylate: a theoretical study.
The journal of physical chemistry. A, 2010Co-Authors: Sriraj Srinivasan, Myung W. Lee, Michael Charles Grady, Masoud Soroush, Andrew M. RappeAbstract:In this study, the mechanism of self-initiation in spontaneous Thermal Polymerization of ethyl and n-butyl acrylate is explored using first-principles calculations. Density functional theory (with ...
C M Shu - One of the best experts on this subject based on the ideXlab platform.
-
comparison of Thermal Polymerization mechanisms for α methylstyrene and trans β methylstyrene
Journal of Thermal Analysis and Calorimetry, 2008Co-Authors: Shengyi Lin, J M Tseng, Yanfu Lin, W T Huang, C M ShuAbstract:The Polymerization mechanisms of styrene and various derivatives by α-methylstyrene (AMS) and trans-β-methylstyrene (TBMS) were evaluated. Experiments were carried out for dimerization identification and Thermal Polymerization estimation by differential scanning calorimetry (DSC), Thermal activity monitor (TAM) and Fourier transform infrared absorption spectrophotometer (FTIR). The results show that, under temperature ranges of 60–190 and 50–170°C, AMS and TBMS performed dimerization by benzene ring and ethylene double bond, respectively. AMS and TBMS would form unsaturated dimers, saturated dimers and trimers, etc., during the period of Thermal Polymerization. Through this study, one can estimate possible intermediates of the Polymerization process for the monomer of interest in the petrochemical industry.
-
Novel determination of the dimerization mechanism for Thermal Polymerization of α-methylstyrene
Journal of Thermal Analysis and Calorimetry, 2006Co-Authors: C C Liao, Y S Duh, C M Shu, J H TzengAbstract:This study discussed the phenomena on Thermal Polymerization of α-methylstyrene (AMS). A curve scanned by temperature-programmed technique was performed by differential scanning calorimetry (DSC). Heat of Polymerization (ΔH) and onset temperature of exothermic (T0) behavior were determined to be 280±10 J g-1 and about 138±1°C, respectively. A dimer formation mechanism was proposed for initiation of the propagating chain. Spectroscopic identification of dimer structure was conducted by infrared (IR) spectroscopy in the wavenumber from 650 to 1100 cm-1associated with molecular fingerprint characteristics. The mechanism of Thermal Polymerization on α-methylstyrene proposed in this study was similar to that of styrene suggested by Mayo.
Alevtina Smirnova - One of the best experts on this subject based on the ideXlab platform.
-
one step solid state in situ Thermal Polymerization of silicon pedot nanocomposites for the application in lithium ion battery anodes
Polymer, 2016Co-Authors: M Mcgraw, Praveen Kolla, Bin Yao, R Cook, Q Quiao, Alevtina SmirnovaAbstract:Abstract The current study presents a one-step solid-state in-situ Thermal Polymerization approach to prepare silicon nanoparticles-polyethylenedioxythiophene (SiNPs-PEDOT) nanocomposites. The structure-related electrochemical performance of the in-situ polymerized 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT) with SiNPs has been studied for the first time in application to silicon-based lithium-ion battery anodes. Thermal Polymerization applied to a solution containing DBEDOT in acetonitrile with suspended silicon nanoparticles resulted in an in-situ formed SiNPs-PEDOT nanocomposite. The structure, morphology, and the corresponding electrochemical performance of the in-situ SiNPs-PEDOT nanocomposites was studied in comparison to a pure PEDOT as well as to the ex-situ polymerized SiNPs-PEDOT nanocomposites using XRD, FTIR, TGA, SEM, TEM, cyclic voltammetry, impedance spectroscopy, and constant current charge-discharge cycles. The XRD, FTIR, and TGA analysis reveal that the in-situ Polymerization of monomer is not impeded by the presence of the silicon nanoparticles. The SEMand TEM studies reveal a uniform dispersion of SiNPs within in-situ polymerized PEDOT matrix compared to ex-situ formed SiNPs-PEDOT nanocomposite. In the lithium-ion battery anode, the in-situ polymerized SiNPs-PEDOT nanocomposite demonstrates the enhanced lithiation-delithiation kinetics, conductivity, and rate capability in comparison to the ex-situ SiNPs-PEDOT nanocomposite.
Sriraj Srinivasan - One of the best experts on this subject based on the ideXlab platform.
-
Self-initiation mechanism in spontaneous Thermal Polymerization of ethyl and n-butyl acrylate: a theoretical study.
The journal of physical chemistry. A, 2010Co-Authors: Sriraj Srinivasan, Myung W. Lee, Michael Charles Grady, Masoud Soroush, Andrew M. RappeAbstract:In this study, the mechanism of self-initiation in spontaneous Thermal Polymerization of ethyl and n-butyl acrylate is explored using first-principles calculations. Density functional theory (with ...
Xu Bin - One of the best experts on this subject based on the ideXlab platform.
-
STUDY ON BEHAVIOR OF PYROLYSIS CONDENSATION OF COAL-TAR PITCH DURING Thermal Polymerization MODIFICATION
Carbon, 2002Co-Authors: Xu BinAbstract:The behavior of pyrolysis condensation of coal-tar pitch during the Thermal Polymerization modification has been investigated in a reaction still.The variation of coking value of coal-tar pitch with the Polymerization time and Polymerization temperature has been discussed.The correlation between the coking value and the toluene insoluble during the Thermal Polymerization modification have been found.
-
INFLUENCE OF QI ON Thermal Polymerization MODIFICATION OF COAL-TAR PITCH
Journal of Fuel Chemistry and Technology, 2002Co-Authors: Xu BinAbstract:Using several medium pitch which have the same softening point but different QI contents as the raw materials, Thermal Polymerization modification experiments have been carried out The results indicate that the QI content of raw materials has evident effect on the modification process and the quality of modified pitch The conversion rates of primary QI during the Thermal Polymerization are directly proportional to the QI content of raw materials By means of the analysis of different kinds of QI components, the mechanism of action of the QI component in the modification of coal tar pitch has been explored It can be concluded that the primary QI carbonaceous particles enhance the Polymerization of aromatic hydrocarbon molecules during the Thermal modification
