Excellent performance of aromatic polyguanamines induced by multiple hydrogen bondable tetraazacalix[2]arene[2]-triazine ring in their main chain.

ABSTRACT: 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 wt%) at 150 °C for 6 hours. The number-average molecular weights (M _n)s of these c-PG polymers reached up to 31 500, with a relatively broad molecular weight distribution (M _w/M _n) 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 (T _g

SUBMITTER: Sasaki H 

PROVIDER: S-EPMC9047533 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature