Study on methods for the determination of acidity of 1,1,1,3,3,3-hexafluoroisopropyl methacrylate was written by Yang, Jian;Liu, Hongjian;Zhao, Weijuan;Sun, Xiaobo. And the article was included in Youjifu Gongye in 2015.Safety of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:
HFIP-M is a colorless liquid, and its acidity has important influence on its quality. This article explored the methods for the determination of acidity of HFIP-M, adopted 3 kinds of commonly used method. The 3 alternations are: (1) Detection of end point by potential change, i.e., the titration performed by an automatic potentiometric titrator. (2) Visual detection of end point with indicators, and (3) acid in the sample was separated by extraction with water or saturated sodium chloride solution and the acidity determined by alkalimetric titration in the aqueous solution As shown by the exptl. results, for the first method, a clear and sharp inflection was observed potentiometrically at the finally point, and to avoid end point judgment error by the manual titration For the second method, among 3 different indicators tested, methylred was the best one, giving sharp colorchange at the end point, and the results is similar to potentiometric titration method. The last, by using saturated sodium chloride solutions extractant, the results can significantly improve the separation efficiency, however, results is low, and the whole anal. procedure was quite time-consuming and tedious. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Safety of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate).
1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Safety of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics