《Well-defined, linear, wholly aromatic polymers with controlled content and position of pyridine moieties in macromolecules from one-pot, room temperature, metal-free step-polymerizations》 was published in Polymer Chemistry in 2020. These research results belong to Cetina-Mancilla, Enoc; Olvera, Lilian I.; Balmaseda, Jorge; Forster, Michael; Ruiz-Trevino, F. Alberto; Cardenas, Jorge; Vivaldo-Lima, Eduardo; Zolotukhin, Mikhail G.. Name: 4-Acetylpyridine The article mentions the following:
Synthesis of processable, aromatic pyridine-containing polymers has always been a great challenge. Here, we report for the first time a robust, low-cost synthesis of well defined, high mol. weight, linear, wholly aromatic polymers with rigid ether-bond-free aryl backbones, where the proportion and position of pyridine moieties and spacer lengths between them in the macromols. are fully controlled. The polymers, in nearly quant. yields, were obtained by one-pot, room temperature, metal-free, non-stoichiometric superacid catalyzed step-polymerization of 4-acetylpyridine (and its mixtures with 2,2,2-trifluoroacetophenone) with multiring aromatic hydrocarbons: biphenyl, meta- and para-terphenyl, and para-quaterphenyl, in the mixture of trifluoromethanesulfonic acid with methylene chloride and trifluoroacetic acid. The polymers are highly soluble in most common solvents and form flexible and tough films with tensile strength in the range of 72-92 MPa. 1H and 13C NMR analyses of the synthesized polymers revealed high regio-selectivity of the polymer forming reaction affording linear structures with para-substitution in the phenylene fragments of the main chains. The mol. weights of the polymers ranged from 20 000 to 100 000 g mol-1, whereas the polydispersity is generally well below 2. The polymers exhibited also high thermostability with Tg > 400°, weight loss temperatures (N2, onset) ca. 485°, char yields of 70-75 at 800° and high chem. stability. Room temperature reactions of the polymers with methyl(trifluoromethylsulfonate) afford the N-methylated cationic polymers. Certain studies on the phys. properties and gas separation of the polymers are highlighted. The experimental part of the paper was very detailed, including the reaction process of 4-Acetylpyridine(cas: 1122-54-9Name: 4-Acetylpyridine)
4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Name: 4-Acetylpyridine