On April 30, 2013, Keul, Helmut; Mommer, Stefan; Moeller, Martin published an article.Quality Control of 3-Aminodihydrothiophen-2(3H)-one hydrochloride The title of the article was Poly(amide urethane)s with functional/reactive side groups based on a bis-cyclic bio-based monomer/coupling agent. And the article contained the following:
Glycerol and D,L-homocysteine thiolactone – two bio-based building blocks – were used to prepare a bis-cyclic AA’ monomer (or coupler) with an ethylene carbonate and a thiolactone ring linked by an O-Me urethane spacer. On reaction of this monomer with diamines at 70 °C poly(amide urethane)s with pendant thioethyl and hydroxymethyl side groups are produced in one step. Monodisperse diamines of low mol. weight (MW), monodisperse amino telechelic poly(ethylene oxide) (MW = 897.10) and polydisperse amino telechelic polytetrahydrofuran (Mn = 1100) were used as amine building blocks. By reaction of the coupler with diamines at room temperature only the thiolactone ring is converted. Consequently, a bis(ethylene carbonate) bis(thiol) is obtained if one equivalent diamine is reacted with two equivalent of coupler. Reaction of this intermediate with a second diamine leads to poly(amide urethane)s with pendant thioethyl and hydroxymethyl side groups and alternating amine building blocks. Post-polymerization modification of thiol side groups leads to polymers with designed properties. The microstructure of the obtained polymers was proven by 1H NMR and Raman spectroscopy; the mol. weights were determined by size exclusion chromatog. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Quality Control of 3-Aminodihydrothiophen-2(3H)-one hydrochloride
The Article related to polyamide polyurethane polyoxyalkylene polyester glass transition temperature, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.Quality Control of 3-Aminodihydrothiophen-2(3H)-one hydrochloride
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics