Selective localization of CNTs in PLLA/TPU blends and its effect onrheological and thermal properties

In this study the effect of interfacial localization of ۱ wt% carboxylated multiwalled carbon nanotubes(MWCNTs) was investigated on the morphology, rheology, and thermal properties of poly (Llactide),PLLA, and thermoplastic polyurethane, TPU, blends (۹۱/۵۱ wt%). Different mixingstrategies were adopted by melt mixing to localize MWCNTs at the interface of PLLA/TPU blends.The PLLA/TPU blend showed sea-island morphology and inclusion of MWCNTs had no effect onthe morphology. Furthermore, at low frequencies of PLLA/TPU/MWCNTs nanocomposites, thecomplex viscosity increased and a plateau observed in the storage modulus. In addition, exothermiccrystallization peak didn’t observed with the addition of TPU and degree of melt crystallizationincreased by the inclusion of MWCNTs.

کلیدواژه ها:

PLLA/TPU/CNT Nanocomposites ، Rheological properties ، Thermal propxerties