Excellent performance of aromatic polyguanamines induced by multiple hydrogen bondable tetraazacalix[2]arene[2]-triazine ring in their main chain was written by Sasaki, H.;Kotaki, T.;Fujimori, A.;Tsukamoto, T.;Suzuki, E.;Oishi, Y.;Shibasaki, Y.. And the article was included in RSC Advances in 2020.HPLC of Formula: 2272-40-4 The following contents are mentioned in the article:
A series of poly(guanamine) (c-PG)s containing tetraazacalix[2]arene[2]-triazine (mPDA2CyC2) were successfully prepared by solution polycondensation of mPDA2CyC2 with various aromatic diamines in an aprotic organic solvent with a lithium chloride additive (5 weight%) at 150°C for 6 h. The number-average mol. weights (Mn)s of these c-PG polymers reached up to 31 500, with a relatively broad mol. weight distribution (Mw/Mn) of 5.3. They showed good solubility in aprotic organic solvents, such as N-methylpyrrolidone and N,N-dimethylacetamide at a concentration of 2 mg mL-1. The glass transition temperatures (Tg) of the c-PG polymers were in the range 359°C-392°C, approx. 160°C higher than those of counterpart polymers (i.e., with no aza-calixarene-based PG (l-PG)). The coefficients of thermal expansion (CTEs) of the c-PG polymers were 29.7-48.1 ppm K-1 (at 100°C-150°C), much lower than those of l-PG samples, i.e., 59.1-85.1 ppm K-1. Transparent and almost colorless c-PG films were successfully prepared by a solution casting method, showing maximum tensile strength (σS), modulus (Eγ), and elongation at break (Eb) values of 151 MPa, 6.3 GPa, and 4.4%, resp., for the c-PG polymer from mPDA2CyC2 and 4,4′-oxydianiline monomers. The corresponding l-PG film exhibited σS, Eγ, and Eb values of just 76 MPa, 5.4 GPa, and 1.6%, resp. These outstanding thermal and mech. properties of the c-PG polymers can be attributed to their multiple hydrogen bonding interaction between mPDA2CyC2 residues in the polymer backbone. This interaction was identified by IR spectroscopy measurements at the broad absorption band around 3000-3400 cm-1. This study involved multiple reactions and reactants, such as 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4HPLC of Formula: 2272-40-4).
4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4) belongs to organic chlorides. An organic chloride is an organic compound containing at least one covalently bonded atom of chlorine. Their wide structural variety and divergent chemical properties lead to a broad range of names and applications.While alkyl bromides and iodides are more reactive, alkyl chlorides tend to be less expensive and more readily available. Alkyl chlorides readily undergo attack by nucleophiles.HPLC of Formula: 2272-40-4
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics