The effect of a micro-crystalline ZnO with columnar structure on the crystallization behavior and mechanical properties of poly(ethylene 2,6-naphthalate)

Polarized optical micrographs of PEN/H-ZnOc blends: (a) 0 wt%, (b) 0.4 wt%, (c) 0.6 wt%, (d) 1.0 wt%, (e) 1.5 wt% isothermally crystallized at 200 °C for 40 min.