In 2022,Ruhland, Klaus; Horny, Robert; Wanzel, Andrea; Reisach, Sebastian; Nizamutdinova, Alina; Kirchhain, Holger; Rehfuss, Ulrich; van Wuellen, Leo; Fischer, Andreas; Scheliga, Felix; Huebner, Tobias published an article in Journal of Applied Polymer Science. The title of the article was 《Investigation of the chemical changes during the thermal treatment of acrylonitrile -co- methyl acrylate-polymer (polyacrylonitrile-precursor) focusing on the fate of the methyl acrylate moiety》.Category: bromides-buliding-blocks The author mentioned the following in the article:
Seventeen samples of acrylonitrile (AN)-co-Me acrylate (MA)-polymer (MA content 0-11 mol%) are examined Several selective isotopic labelings are employed (d1-MA, d2-MA, 13CO-MA, CD3-MA, d1-AN, d2-AN, and 15N-AN). The thermal treatment under inert atm. is investigated to gain insight into the chem. transformation mechanisms concerning the MA sub-unit. The volatiles are determined by means of evolved gas anal. (EGA) (Fourier transform IR [FTIR] and GC/MS). Methanol is found for the first time as one decisive volatile stemming from the MA sub-unit, next to water and carbon dioxide. In addition, methylamines are proven to be formed by reaction of ammonia with the MA sub-unit, while a similar reaction of hydrogen cyanide (HCN) yielding in acetonitrile could be ruled out. Several volatile compounds could even be quantified. The non-volatile polymeric material is characterized by means of simultaneous thermal anal. (differential scanning calorimetry, thermogravimetric anal.), in-situ-FTIR spectroscopy and sophisticated solid-state NMR methods. Selected defined model compounds are synthesized and analyzed for comparison. Detailed reaction mechanisms for the thermal transformation are concluded from the results, pointing in particular to the importance of ammonia for all processes as stoichiometric and/or catalytic reagent. In the experiment, the researchers used many compounds, for example, Methyl 3-bromopropanoate(cas: 3395-91-3Category: bromides-buliding-blocks)
Methyl 3-bromopropanoate(cas: 3395-91-3) belongs to bromides. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Category: bromides-buliding-blocks
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary