A simple criterion, based on the evaluation of a local critical capillary number, is proposed to predict the morphological evolution of the flowing blend.
In some ways, this does seem like the logical evolution of the series: blending its 2D roots with some of the innovations of the Prime saga.
The structure evolution of these blends during uniaxial stretching was followed by in-situ synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) techniques.
Emphasis was placed on investigating the effects of viscosity ratio, blend composition, and processing variables (temperature, rotor speed, and mixing time) on the evolution of blend morphology in five blend systems: (i) nylon-6/high-density polyethylene (HDPE), (ii) poly methyl methacrylate) (PMMA)/polystyrene (PS), (iii) polycarbonate (PC /PS, (iv) PS/HDPE, and (v) PS/polypropylene (PP).
It was confirmed that the self-agglomerating pattern of the nanoparticle in the polymer melts plays a key role in directing the morphology evolution of the immiscible polymer blend: unlike the self-agglomeration of carbon black to form three-dimensionally continuous network structure, the TiO2 nanoparticles tend to form separate clusters in the PA6 phase.
The evolution of the storage modulus of the blends at a constant low frequency with composition showed a great enhancement of the elasticity when PA6 was the dispersed phase, and the maximum of the storage modulus at the evaluated frequency was definitely related to the phase inversion in pure blends.
The time dependence of the morphology evolution of this iPP/PEOc blend with different compositions was annealed at both 200 and 170 °C and investigated with scanning electron microscopy (SEM) and phase contrast optical microscopy (PCOM).
We conducted a 'screw pullout' experiment to investigate the evolution of blend morphology, determined by transmission or scanning electron microscopy, along the extruder axis.
The evolution of blend morphology during compounding in a twin-screw extruder was investigated, putting emphasis on the effects of viscosity ratio, blend composition, and processing variables (barrel temperature profile and screw speed).
