Wh. Chan et al., SYNTHESIS AND CHARACTERIZATION OF RANDOM POLY(AMIDE-SULFONAMIDE)S .3.COPOLYMERS FROM 2 DIAMINO MONOMERS, Polymer, 36(23), 1995, pp. 4503-4508
Four new series of poly(amide-sulfonamide)s (PASAs), having different
ratios of two different diamino monomer moieties in the polymer backbo
ne, were obtained by low-temperature solution polycondensation of the
respective diamines with terephthaloyl chloridelisophthaloyl chloride.
With the exception of the most highly symmetric polymer series, all o
f the other polymers were readily soluble in aprotic polar solvents su
ch as N,N-dimethylacetamide, dimethylformamide and dimethyl sulfoxide.
The three series of soluble polymers had intrinsic viscosities in the
ranges 0.51-0.72, 0.33-0.49 and 0.70-0.92 dl g(-1). Differential scan
ning calorimetry showed these PASAs to have glass transition temperatu
res greater than 250 degrees C. Thermogravimetric analysis of the poly
mers showed moderate thermal stabilities, with 10% weight losses being
recorded over the range 382-408 degrees C. X-ray diffraction studies
indicated that some of these polymers possess a certain degree of crys
tallinity.