Effect of gaseous oxygen pressure on the kinetics of accumulation of residual deformation in resins

1975 ◽  
Vol 9 (3) ◽  
pp. 489-491
Author(s):  
G. M. Bartenev ◽  
V. G. Rebizova ◽  
A. S. Kosenkova ◽  
V. S. Kardash ◽  
E. P. Stogova
Keyword(s):  
Oxygen Pressure ◽  
Residual Deformation ◽  
Gaseous Oxygen ◽  
Kinetics Of

scholarly journals The study of the possibility of using domestic burnt magnesia in oil and petrol resistant rubber

2019 ◽  
Vol 59 (7) ◽  
pp. 63-68
Author(s):  
Nikolay F. Ushmarin ◽  
◽  
Evgeny N. Egorov ◽  
Nikolay I. Kol'tsov ◽  
◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Residual Deformation ◽  
Rubber Matrix ◽  
Standard Samples ◽  
Start Time ◽  
Technical Grade ◽  
Rubber Mixture ◽  
Roll Mill ◽  
Resistant Rubber ◽  
Kinetics Of

The article examines the oil-and-petrol resistant rubber mixture of type 7NO-68-1SK based on the combination of BNKS-18AMN grade butadiene-caoutchouc with polychloroprene caoutchouc of brand neoprene W. The effect of replacing imported burnt magnesia brand Remag AC on domestic burnt magnesia technical grade B on the properties of the rubber compound and vulcanizate was studied. The rubber mixture was prepared on a laboratory roll mill LB 320 160/160, and then its standard samples were vulcanized at 150 °C for 30 minutes in a two-story electrically heated press of the VP 400-2E brand. To establish the plasto-elastic properties of rubber mixture on the Mooney viscometer, MV 3000 was determined: the start time of the vulcanization, the time to reach the vulcanization mode, the initial maximum viscosity. To assess the kinetics of vulcanization of the rubber mixture on the rheometer MDR 3000 was determined: the start time of vulcanization, the time to reach the optimum vulcanization, the maximum torque. To assess the physicomechanical properties of rubber, the following were determined: conditional tensile strength; elongation at break; hardness; tear resistance and relative residual deformation under compression in accordance with the standards in force in the rubber industry. To assess the performance properties of rubber, changes in its mass were determined after aging in a mixture of isooctane + toluene, as well as standard liquid SJR–1. It has been shown that the introduction of burnt magnesia technical grade B into the rubber mixture does not lead to technological complications, magnesia is well distributed in the rubber matrix, and the magnesia agglomerates were not found on the rubber mixture sections. Replacement magnesium oxide m. Remag AC on burnt magnesia technical grade B has an impact on the plasto-elastic and rheometric properties of the rubber mixture. However of physicomechanical and operational properties vulcanizates of rubber mixture containing magnesium oxide m. Remag AC and burnt magnesiatechnical grade B, have almost the same values.

Oxygen Isotope Exchange between Gaseous Phase Enriched with 18O Isotope and Nanocrystal Oxides LaMnO3+δ Obtained by Severe Plastic Deformation

2008 ◽  
Vol 273-276 ◽  
pp. 233-238 ◽  
Author(s):  
Boris A. Gizhevskii ◽  
Anatoly Yakovlevich Fishman ◽  
E.A. Kozlov ◽  
Tatiana Eugenievna Kurennykh ◽  
S.A. Petrova ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Isotope Exchange ◽  
Gaseous Oxygen ◽  
Oxygen Isotope Exchange ◽  
Self Diffusion ◽  
Isotope Concentration ◽  
18O Isotope ◽  
O Isotope ◽  
Kinetics Of

The kinetics of the isotope exchange between gaseous oxygen enriched with the 18O isotope and two LaMnO3+δ oxide samples – a nanopowder and a bulk nanocrystal – has been studied. The 18O isotope concentration has been measured by the acceleration nuclear microanalysis method. The coefficients of the volume and the nanograin boundary self-diffusion of oxygen have been evaluated at 500 °C. They are equal to 3.5·10 −20 and 1.5·10 −13 cm2/s, respectively.

Kinetics of the Oxidation of Galena In Ammonium Acetate Solutions Under Oxygen Pressure

JOM ◽  
1956 ◽  
Vol 8 (8) ◽  
pp. 1096-1099
Author(s):  
D. P. Seraphim ◽  
C. S. Samis
Keyword(s):  
Oxygen Pressure ◽  
Ammonium Acetate ◽  
Kinetics Of

scholarly journals Kinetics of photocatalytic oxidation of phenol on CuO-TiO2 at high oxygen pressure

2016 ◽  
Vol 31 (3) ◽  
pp. 68-75
Author(s):  
F.F. Orudzhev ◽  
◽  
A.B. Isayev ◽  
F.G. Gasanova ◽  
N.S. Shabanov ◽  
...  
Keyword(s):  
Oxygen Pressure ◽  
Photocatalytic Oxidation ◽  
High Oxygen ◽  
High Oxygen Pressure ◽  
Oxidation Of Phenol ◽  
Kinetics Of

The Kinetics of Oxygen Delignification of Reed Kraft Pulp (I)-Kinetics of Delignification

2011 ◽  
Vol 236-238 ◽  
pp. 1420-1424
Author(s):  
Xiao Feng Pan ◽  
Le Fan Ma ◽  
Qin Qin Qu ◽  
Jia Liang Lan ◽  
Li Hong Tan
Keyword(s):  
Activation Energy ◽  
Reaction Time ◽  
Oxygen Pressure ◽  
Kraft Pulp ◽  
Reaction Order ◽  
Frequency Factor ◽  
Kappa Number ◽  
Alkali Concentration ◽  
Oxygen Delignification ◽  
Kinetics Of

The kinetics of reed kraft pulp oxygen delignification process is studied, suitable kinetics model determined is -dk/dt=Aexp(-E/RT) [OH-]b[PO2]cKa, and the parameters in the model is calculated. The function for estimation of the kappa number at different reaction time is established for the reed kraft pulp oxygen delignification process. The reaction order fitted is 6.72 for delignification (a), 0.87 for alkali concentration (b), and 0.62 for oxygen pressure(c), respectively. The activation energy E is 80.96KJ/mol and frequency factor A 1.5×104.

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