One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 108-32-7, Name is 4-Methyl-1,3-dioxolan-2-one, formurla is C4H6O3. In a document, author is Velioglu, Sadiye, introducing its new discovery. HPLC of Formula: C4H6O3.
An atomistic insight on CO2 plasticization resistance of thermally rearranged 6FDA-bisAPAF
An emerging class of thermally rearranged (TR) polymer has been of great interest for its extraordinary transport properties. More importantly, harnessing the full potential of TR polymer as gas separation membrane for CO2/CH4 separation is through its ability to resist plasticization at high pressures. Accordingly, we report here on the effect of CO2-induced plasticization on polyimide precursor (6FDA-bis-APAF: 4,4-hexafluoro isopropylidenediphthalic anhydride -2,2′-bis(3-amino-4-hydroxyphenyl) – hexafluoropropane) and on the resulting thermally rearranged polybenzoxazole (TR-PBO) polymer membranes as investigated through the radial distribution function and accessible free volume analyses. Using molecular simulation techniques, structural properties such as d-spacing, glass transition temperature, fractional free volume, etc. were estimated in agreement with wide range of experimental observations, which are published within the last decade. Results showed that, TR polymer displayed restricted % FFV increase up to 40 bar due to its limited chain mobility as indicated by the dihedral distribution, and sorption sites on its backbone with lower affinity to CO2 as shown by the RDF analyses. Additionally, analysis of free volume elements suggests that the ability of TR polymers to maintain their interconnected microstructure and resistance to CO2-induced plasticization at high pressures leads also to higher diffusion and hence permeation performances and as a result, make them promising materials in gas separation applications.
I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 108-32-7 help many people in the next few years. HPLC of Formula: C4H6O3.
Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem