Bk. Hong et al., MISCIBILITY OF SYNDIOTACTIC POLYSTYRENE ATACTIC POLYSTYRENE BLENDS BYCRYSTALLIZATION KINETICS AND ENTHALPY RELAXATION/, Polymer, 39(16), 1998, pp. 3753-3757
The miscibility of syndiotactic polystyrene (sPS)/atactic polystyrene
(aPS) blends, whose constituent polymers have close T(g)s was investig
ated by crystallization kinetics and enthalpy relaxation. It was obser
ved from crystallization kinetics experiment that both the spherulite
growth rate and the overall crystallization rate of sPS in blends decr
ease with an increasing amount of aPS, indicating that sPS is diluted
with aPS. When enthalpy relaxations of the blends are examined, it is
revealed that the enthalpy recovery of sPS/aPS blends shows a single p
eak whose relaxation time is intermediate between those of sPS and aPS
, and that the relaxation time of the blends gradually increases with
the amount of aPS. From these results, it is concluded that sPS/aPS bl
ends are completely miscible over the entire composition. (C) 1998 Els
evier Science Ltd. All rights reserved.