Thermal decomposition of diethyl ketone triperoxide in methyl methacrylate: Theoretical and experimental study of the initial solvation state and its influence on the polymerization process

2015 ◽  
Vol 133 (4) ◽  
pp. n/a-n/a
Author(s):  
Karla Delgado Rodríguez ◽  
Francisco J. Enríquez-Medrano ◽  
Daniel Grande ◽  
Gastón P. Barreto ◽  
Adriana Cañizo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Decomposition ◽  
Methyl Methacrylate ◽  
Polymerization Process ◽  
Diethyl Ketone ◽  
Solvation State

Methyl methacrylate as solvent for the thermal decomposition of the cyclic molecule pinacolone diperoxide: Toward the polymerization process

2019 ◽  
Vol 57 (9) ◽  
pp. 997-1007
Author(s):  
Karla Delgado‐Rodríguez ◽  
Francisco J. Enríquez‐Medrano ◽  
Adriana Berenice Espinoza‐Martínez ◽  
Gastón P. Barreto ◽  
Gabriel Merino ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Methyl Methacrylate ◽  
Polymerization Process ◽  
Cyclic Molecule

Experimental study on the thermal decomposition and combustion characteristics of nitrocellulose with different alcohol humectants

2017 ◽  
Vol 340 ◽  
pp. 202-212 ◽  
Author(s):  
Yu He ◽  
Yaping He ◽  
Jiahao Liu ◽  
Pan Li ◽  
Mingyi Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Decomposition ◽  
Combustion Characteristics

Experimental Study and a Short Kinetic Model for High-Temperature Oxidation of Methyl Methacrylate

2018 ◽  
Vol 191 (10) ◽  
pp. 1789-1814 ◽  
Author(s):  
Shanmugasundaram Dakshnamurthy ◽  
Denis A. Knyazkov ◽  
Artem M. Dmitriev ◽  
Oleg P. Korobeinichev ◽  
Elna J.K. Nilsson ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Kinetic Model ◽  
Methyl Methacrylate ◽  
High Temperature Oxidation ◽  
Temperature Oxidation

scholarly journals Iron reduction from concentrates of hydrometallurgical dressing

2021 ◽  
Vol 64 (10) ◽  
pp. 728-735
Author(s):  
I. A. Rybenko ◽  
O. I. Nokhrina ◽  
I. D. Rozhikhina ◽  
M. A. Golodova ◽  
I. E. Khodosov
Keyword(s):  
Experimental Study ◽  
Thermal Decomposition ◽  
Thermodynamic Modeling ◽  
Iron Reduction ◽  
Solid Phase ◽  
Experimental Studies ◽  
Statistical Processing ◽  
Reducing Agent ◽  
Volatile Components ◽  
Software Complex

The article presents results of theoretical and experimental studies of the processes of iron solid-phase reduction from an iron-containing concentrate obtained as a result of hydrometallurgical dressing of ferromanganese and polymetallic manganese-containing ores with coals of grades D (long-flame) and 2B (brown). The method of thermodynamic modeling using TERRA software complex was used to study the reducing properties of hydrocarbons by calculating equilibrium compositions in the temperature range of 373 - 1873 K. The authors obtained the dependences of compositions and volume of the gas phase formed as a result of the release of volatile components during heating on the temperature for the coals of the grades under consideration. As a result of thermodynamic modeling, the optimal temperatures and consumption are determined, which ensure the complete iron reduction from an iron-containing concentrate. The results of experimental studies were obtained by modern research methods using laboratory and analytical equipment, as well as methods of statistical processing. Results of the coals analysis carried out using the Setaram LabSys Evo thermal analyzer showed that the process of thermal decomposition of coals of the studied grades proceeds according to general laws. The process of thermal decomposition of long-flame coal proceeds less intensively than of brown coal. The results of an experimental study of the processes of thermal decomposition of reducing agents have shown that volumes of the gas phases, formed when coals are heated to a temperature of 1173 K in an argon atmosphere, practically coincide with the calculated values. As a result of thermodynamic modeling and experimental study, the optimal consumption of D and 2B grades of coal is determined at a temperature of 1473 K. The best reducing agent with a minimum specific consumption is long-flame coal of D grade. When determining the optimal amount of reducing agent in charge mixtures during the study of metallization processes, it was found that with an excess of reducing agent, it is possible to achieve almost complete extraction (98 - 99 %) of iron from the concentrate.

scholarly journals Homogeneous Distribution of Polymerizable Coumarin Dyes for Active Few Mode POF

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1975
Author(s):  
Florian Jakobs ◽  
Kristoffer Harms ◽  
Jana Kielhorn ◽  
Daniel Zaremba ◽  
Pen Yiao Ang ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Optical Fibers ◽  
High Performance ◽  
Polymer Chains ◽  
Size Exclusion ◽  
Polymerization Process ◽  
Homogeneous Distribution ◽  
Exclusion Chromatography ◽  
Polymer Optical Fibers ◽  
Coumarin Dyes

For most kinds of active polymer optical fibers, a homogeneous distribution of dye molecules over the entire fiber length and cross section is required. In this study, chemical bonding of dyes to poly(methyl methacrylate) (PMMA) by copolymerization is achieved within the polymerization process instead of dissolving the dyes in the monomers. In combination with an improved fabrication mechanism, this leads to homogeneous dye distribution within the preforms. A method for proving the integration of the dyes into the polymer chains has been developed using high-performance liquid chromatography (HPLC) and size exclusion chromatography (SEC). Prestructured core-cladding preforms with dye-doped poly(cylohexyl methacrylate-co-methyl methacrylate)-core have been prepared with the Teflon string technique and were heat-drawn to few mode fibers.

Methyl methacrylate reactivity under electric field in view of an electrically induced polymerization process

2019 ◽  
Vol 723 ◽  
pp. 57-64
Author(s):  
Eduardo A. Soto-Bustamante ◽  
Sergio O. Vásquez ◽  
Patricio Romero-Hasler
Keyword(s):  
Electric Field ◽  
Methyl Methacrylate ◽  
Polymerization Process

Poly(methyl methacrylate)/Graphene Oxide Nanocomposites by a Precipitation Polymerization Process and Their Dielectric and Rheological Characterization

2014 ◽  
Vol 47 (6) ◽  
pp. 2149-2155 ◽  
Author(s):  
Jean-Michel Thomassin ◽  
Milana Trifkovic ◽  
Walid Alkarmo ◽  
Christophe Detrembleur ◽  
Christine Jérôme ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Precipitation Polymerization ◽  
Polymerization Process ◽  
Rheological Characterization ◽  
Poly Methyl Methacrylate
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