| Abstract: | We present results of oscillatory shear rheology experiments on miscible blends of commercial styrene‐acrylonitrile (SAN) and styrene‐maleic anhydride (SMA) copolymers. We find that this blend system upholds the empirical time‐temperature superposition principle. We compare the thermorheological behavior in this system with other blends, on which oscillatory shear data have been published in the literature. We show that thermorheological behavior in these blends is indeed comparable to other known thermorheologically simple blends. Thermorheological simplicity in this blend is nicely anticipated by a thermorheological phase diagram in the parameter space of dynamic asymmetry and free volume, which we have recently proposed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1245–1249, 2000 |
