Abstract: The invention relates to thermotropic liquid crystalline polymer compositions of the general formula:--(CO--C.sub.6 H.sub.4 O).sub.m --(CO--C.sub.6 H.sub.4 --CO).sub.n--(O--C.sub.6 H.sub.4 --X).sub.p --(O--C.sub.6 H.sub.4 --C(CH.sub.3).sub.2 --C.sub.6 H.sub.4 --O).sub.q --(O--C.sub.6 H.sub.4 --S--C.sub.6 H.sub.4 --O).sub.t --where substantially all aromatic substituents are para to one another, where--X-- can be either --O-- or --NH--, andm, n, p, q and t are mole fractions totaling 1.0,wherem is 0 to 0.75,m plus 2p is 0.5 to 0.75,n is 0.125 to 0.5,p is 0 to 0.375,q is 0.125 to 0.25,n equals p plus q plus t, andt is greater than 0.0125, but equal to no greater than 90% of q plus t.Preferably X is --O--, m is from 0.5 to 0.75 and p is less than 0.05. Alternatively, m is less than 0.1 and p is from 0.25 to 0.375.