Abstract
AbstractNovel, soluble aromatic polyamides and copolyamides containing tetraphenylethylene units were prepared by the low temperature solution polycondensation of 1,1‐bis(4‐aminophenyl)‐2,2‐diphenylethylene and aromatic diamines with various aromatic diacid chlorides. Highmolecular‐weight polyamides having inherent viscosities of 0.6–1.5 dL/g and number‐average molecular weight above 21000 were obtained quantitatively. These polymers were readily soluble in various solvents such as N‐methyl‐2‐pyrrolidone, N,N‐dimethylacetamide (DMAc), and dimethyl sulfoxide and gave pale yellow, transparent, flexible films by casting from DMAc solution. The polymers had glass transition temperatures between 290 and 340°C, and started to lose weight around 400°C, with 10% weight loss being recorded at about 470°C in air.
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