The dependence of miscibility on blend composition and temperature for syndiotactic polystyrene/poly(vinyl methyl ether) (SPS/PVME) blends, was investigated by solid state n.m.r. spectroscopy and d.s.c. and compared with that of the blend containing atactic polystyrene (APS). The temperature dependence of C-13 cross polarization/magic angle spinning intensities for the resonance of SPS/PVME blends indicates that these blends are phase separated, whereas for the APS/PVME blends, there is evidence of extensive mixing. These results are supported by the presence of one and two glass transition temperatures for the SPS/PVME and APS/PVME blends, respectively, on the d.s.c. thermograms.
MISCIBILITY OF SYNDIOTACTIC POLYSTYRENE POLY(VINYL METHYL-ETHER) BLENDS
Cimmino S;Di Pace E;Silvestre C;
1993
Abstract
The dependence of miscibility on blend composition and temperature for syndiotactic polystyrene/poly(vinyl methyl ether) (SPS/PVME) blends, was investigated by solid state n.m.r. spectroscopy and d.s.c. and compared with that of the blend containing atactic polystyrene (APS). The temperature dependence of C-13 cross polarization/magic angle spinning intensities for the resonance of SPS/PVME blends indicates that these blends are phase separated, whereas for the APS/PVME blends, there is evidence of extensive mixing. These results are supported by the presence of one and two glass transition temperatures for the SPS/PVME and APS/PVME blends, respectively, on the d.s.c. thermograms.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
