Isothermal crystallization kinetics and morphology of PP/TiO₂ nanocomposites using titanium n‐butoxide precursor

Abstract

This study investigates the influence of the addition of TiO2, obtained by hydrolysis–condensation reaction of titanium dioxide precursors, on the kinetics of polypropylene (PP) isothermal crystallization. The dispersion of nanoparticle and its relation to the degree of crystallinity by XRD was also investigated. The results indicated that the addition of the TiO2 increased the degree of crystallinity of PP and its crystallization temperature. Likewise, the nucleation and crystal growth processes were also affected, as indicated by the TEM morphology, the Avrami kinetic model, and the optical microscopy, in which a nucleation effect was detected. POLYM. COMPOS. 36:517–526, 2015. © 2014 Society of Plastics Engineers

Correlation between morphology and electrical breakdown strength of the polypropylene/maleic anhydride grafted polypropylene/nano‐ZrO2 ternary system

“…A slight amount of nano‐ZrO 2 at 0.5 wt % would effectively suppress the formation of β‐crystal, and in Figure (a) the β‐crystal peak disappeared with 5 wt % nano‐ZrO 2 addition. Similar results were also found in nano‐TiO 2 . The blending with PP‐g‐MAH had the similar effect of suppressing β‐crystal, as shown in Figure (b).…”