Furthermore, the viscosity of POP1 decreases sharply between its melting point and 100[degrees]C, whereas POP2 displays weaker temperature dependence at this temperature range.
Activation energies, which are summarized in Table 1, show that POP2 has slightly higher activation energy than POP1, presumably because of the presence of more branching.
As expected, the onset of sintering neck growth for POP2 occurs at lower temperature than for POP1, due to its lower melting point.
Since the zero shear viscosity of POP2 is similar to that of POP1 at most temperatures (see Fig.
As temperature increases, the POP2 particles soften earlier than those of POP1 and stick with each other, but the coalescence rate remains lower.
POP2 exhibits higher elongation at break and impact energy than POP1, owing to its lower crystallinity arising from the higher comonomer content.
POP2 exhibits lower melting point, broader melting peak and lower heat of fusion (corresponding to lower crystallinity) than POP1.