Investigation on domain structure of poly(phenylene sulphide) and poly(ether sulphone) blends by solid-state nuclear magnetic resonance methods

The domain structure of blends of poly(phenylene sulphide) (PPS) and poly(ether sulphone) (PES) has been studied by solid-state nuclear magnetic resonance methods. 1H T 2, T 1 and T 1 ϱ data have been measured and a cross-polarization magic-angle spinning (CP/MAS) technique has been used. The relaxation data indicate that solution-cast blends are partially compatible. When the PPS/PES ratio equals 4 6 , the compatibility of the blends is best, PES and amorphous-phase PPS mixing intimately besides the 10% crystalline domain. CP/MAS spectra of 13C and 1H T 1 ϱ data of the blends show that the morphology of PPS crystalline phase has been changed when PPS is solution-cast with PES; the shorter T 2, longer T 1 and T 1 ϱ crystalline phase may correspond to the PPS cold crystalline phase. The domain size of the solution-cast blends with PPS PES = 4 6 is just at the 0.1 μm scale determined by Goldman-Shen CP/MAS spin-diffusion methods. But the compatibility of mechanical blends is poor; they have the same domain structure as that of the respective homopolymers.