Chemistry graduates have much scope to use their knowledge in a range of research sectors, including roles within chemical engineering, chemical and related industries, healthcare and more. 256-96-2, Name is 5H-Dibenzo[b,f]azepine, molecular formula is , belongs to pyrrolines compound. In a document, author is Lee, Sun Young, Synthetic Route of 256-96-2.
Evaluation of Aging Behavior of Nitrile Butadiene Rubbers via Oxygen-consumption Experiments
The aging behavior of nitrile butadiene rubber (NBR) was studied by performing a thermo-oxidatively accelerated-aging test in a closed oxygen-rich atmosphere. The oxygen-consumption rates of the aged NBR were measured and correlated with changes in the chemical and physical properties of the rubber. Changes in the morphological, chemical, and mechanical properties of the aged NBR were examined via scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), and tensile tests. Morphological observations revealed that the aging conditions severely degraded the surface of the NBR, and additive particles migrated from the inner part of the NBR to the surface at temperatures above 60 degrees C. XPS indicated that the surface or cross-sectional face of the NBR was oxidized heterogeneously after the thermo-oxidative aging. The oxidation induced cross-linking, which caused the tensile modulus of the NBR to increase with an increase in the aging time and temperature; tensile elongation tended to decrease. The results of the thermo-oxidative accelerated-aging test were analyzed based on the Arrhenius model, using data of the oxygen-consumption rates. Finally, the activation energy of the degradation process was determined and the lifetime of the NBR was calculated. The lifetime of NBR conserved at 25 degrees C was estimated to be 11.12 years at a 40 % oxygen-consumption rate.
Future efforts will undeniably focus on the diversification of the new catalytic transformations. These may comprise an expansion of the substrate scope from aromatic and heteroaromatic compounds to other hydrocarbons. Keep reading other articles of 256-96-2. Synthetic Route of 256-96-2.
Reference:
Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem