Properties of LDPE/POE-g-MA Composites Containing Multiwall Carbon Nanotubes Modified by Fumed Silicon Dioxide

Abstract

Low density polyethylene (LDPE)/maleic anhydride grafted polyolefin elastomer (POE-g-MA) with multiwall carbon nanotubes (MWCNTs) wrapped by fumed silicon dioxide (SiO₂) were prepared by melt mixing. The results revealed that SiO₂ improved the dispersion of MWCNTs on matrix. SiO₂ and MWCNTs both had a heterogeneous nucleation effect on matrix and the crystallinity of composites increased with adding SiO₂, MWCNTs and MWCNTs/SiO₂. The addition of MWCNTs modified by SiO₂ increased tensile strength and elongation at break of composites compared with composite with raw MWCNTs. MWCNTs had a strong absorption effect, leading to an obvious decrease in reflectance at 1060 nm of composites.

Keywords:

• Crystallization behavior
• Low density polyethylene
• Mechanical properties
• Multiwall carbon nanotubes
• Reflectance

Notes

: onset crystallization temperature; : peak crystallization temperature; : peak melting temperature; ΔH _m : melting enthalpy; X _c : crystallinity.