As it is well known, the presence of a more ductile disperse phase (21), (28), or dispersed microvoids (29) in a stiffer matrix can promote the plastic deformation of the matrix increasing the material toughness.
60% ESO copolymers displayed a higher volume fraction of disperse phase than 40 and 80% ESO systems.
5 in the form of a residence time distribution RTD curve, which gives the concentration frequency of pulse-like disperse phase ("tracer") in terms of optical response as function of time (6-9).
6 as the disperse phase amount increases, increasing the number of interfaces and so its influence.
The size distribution of the disperse phase for blends with 25 and 75 wt% of PA6 processed in the single or twin-screw extruders is shown in Fig.
The reduction of PA6 disperse phase size domain in the rHDPE matrix observed in this work is similar to works using copolymers as coupling agents, such as acrylic acid (3), (9), (21) glycidyl methacrylate (9), (26), (27), maleic anhydride (9), (21), (27), (28), ionomers (21), and blends compatibilized by ultrasonic extrusion (29).
In a previous work  it was stated that the attenuation factor (T) due to the presence of a disperse phase was directly related to the normalized detector's signal, according to Eq.
The in-line measurements were corroborated with an off-line analysis such as infrared (FTIR) to evaluate the disperse phase concentration and scanning electron microscopy (SEM) to quantify the morphology (average particle size).
The disperse phase was contrasted by means of wolframophosphoric acid.
In the present case, this means that right at the start of the melting section, particles develop in the disperse phase that are already the size of those seen at the end of the extruder .
and 10a), gives similar trends to the SEM results: IPC-3 contains a lower amount of disperse phase than IPC-2.
From the evidence above, it is apparent that the final disperse phase particle size is the result of a drop breakup-coalescence equilibrium.
C, can be expressed as a function of the shear rate and the concentration of the disperse phase
[Phi] [21, 23].
Inhibition of aggregation of disperse phase
polymer droplets in the case of prolonged exposure of mixture melt in viscometer chamber is explained by the improvement of miscibility of polymers when specific interactions occur.
This study enabled us to develop a complementary methodology including the dissolution of the EPR matrix and quantitative separation of the disperse phase
into two fractions by filtering.