Ziegler-Nattaisotacticpolypropylene(iPP)wasmeltmixedwithfourdifferentnucleatingagents(carbonnanotubes(CNT),carbon nanofibers(CNF),lithiumbenzoate(LiBe),andasorbitolderivative(Millad))inordertostudytheireffectonthecrystallizationof iPP.Itwasfoundthatthefourdifferentnucleatingagentspromotethealphacrystallineform.At0.01wt%,thecarbonnanoparticles producedthehighercrystallizationtemperature“