Polymer blends can exist in various morphologies ranging from a completely mixed amorphous system, as in the polystyrene (PS)/poly-o-chlorostyrene (PoCIS) blend below its lower critical solution temperature (LCST) to a system containing mixed crystals as in poly(ethylene terephthalate) (PET)/poly(butylene terephthalate) (PBT) blends. The final morphology developed in a blend can lead to information concerning the mixing behavior of the two polymers. With this in mind, small-angle x-ray (SAXS), neutron (SANS), and light (SALS) scattering have been used to examine mixtures of poly(vinyl chloride) (PVC) and poiv-ϵ-caprolactone (PCL), isotactic polystyrene (iPS) in atactic polystyrene (aPS), PS in PoCIS, and poly-p-iodostyrene (PpIS) in PS. PVC/PCL and iPS/PS blends are semicrystalline above 50% (by weight) PCL and 70% iPS. Microscopically, the two systems are volume filled with spherulites at these concentrations. Examination on the submicroscopic scale reveal some interesting differences.
No takes yet. Share an insight, caveat, or question.
Russell et al. (1980) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: