The Rheological, Thermostable, and Mechanical Properties of Polypropylene/Fullerene C_(60) Nanocomposites With Improved Interfacial Interaction

摘要

Polypropylene (PP)/C_(60) nanocomposites with improved interfacial interaction were prepared via in situ melt radical reaction. It was found that the relaxation time of PP/C_(60) nanocomposites containing peroxide increased due to the reaction between C_(60) and PP macroradicals and the formation of long chain branched or crosslinking structure. Thermogravimetric analysis (TGA) results showed that the thermal stability of PP/C_(60) nanocomposites was enhanced. The initial decomposition temperatures and activation energy of PP/C_(60) nancomposites were strongly influenced by the content of unreacted C_(60). Because of the improved interfacial interaction, PP/C_(60) nanocomposites containing peroxide showed obvious increase in tensile strength, Young' modulus, flexural strength, flexural modulus, and impact strength, compared to PP/C_(60) nanocomposites (without peroxide) containing the same content of C_(60).