Synthesis and properties of polyimides containing tetraphenylnaphthalene units was written by Morikawa, Atsushi;Karube, Chihiro;Sakaki, Yu. And the article was included in High Performance Polymers in 2016.Recommanded Product: Pyridinehydrochloride This article mentions the following:
Aromatic polyimides (PI1x) with a tetraphenylnaphthalene unit between ether linkages were synthesized from 1,4-bis[4-(aminophenoxy)phenyl]-2,3-diphenylnaphthalene (1) and various tetracarboxylic dianhydrides by a conventional two-step procedure that included ring-opening polymerization in N-methyl-2-pyrrolidone and subsequent thermal cyclic dehydration. PI1x were characterized by X-ray diffraction, differential scanning calorimetry, thermogravimetry, and dynamic mech. anal. PI1x had glass transition temperatures in the range of 270 to 315鎺?and all PI1x were amorphous. The structure-property relationships of these PIs were examined and compared with those of polyimides (PI2x) from 4,4′-bis(4-aminophenoxy)biphenyl (2) and polyimides (PI3x) from 1,4-bis(4-aminophenyl)-2,3-diphenylnaphthalene (3). Water absorption and dielec. constants (钄? of the PIs were also compared and discussed on the basis of imide content per repeating unit. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Recommanded Product: Pyridinehydrochloride).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine derivatives are also useful as small-molecule 浼?helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Recommanded Product: Pyridinehydrochloride