C. Rosales et al., VISCOELASTIC AND MORPHOLOGICAL-STUDY OF POLYAMIDE-6 POLYETHYLENE/SEBS-G-DEM TERNARY BLENDS/, Journal of macromolecular science. Pure and applied chemistry, A35(7-8), 1998, pp. 1187-1205
The viscoelastic and morphological properties of ternary reactive blen
ds of different low and linear low density polyethylenes, polyamide-6
and functionalized SEES were studied. The SEES was functionalized via
reactive extrusion using diethylmaleate as the functionalizing monomer
. Even though the grafting degree achieved was very low (about 0.040 w
t%) due to the high melt viscosity of the SEES, a lower particle size
and no coalescence of the dispersed phase were obtained when SEBS-g-DE
M was added to the blends and when the polyamide was the dispersed pha
se. There was no change in the dispersed phase size when the SEBS-g-DE
M was used between 3 to 5%. However, when 10% was added, there was an
increase in the volume average diameter due to the excess of emulsifie
r agent that builds up an additional dispersed phase. In addition to t
he viscosity ratio, the influence of the elasticity on the dispersed p
hase size is important and should be considered. When LLDPE and LDPE2
with similar viscosity curves were used as minor components, a finer d
ispersed phase was obtained with LLDPE which showed lower G' values.