Study the mechanical and thermal properties of biodegradable polylactic acid/poly ethylene glycol nanocomposites

Abstract

Polylactic acid (PLA) is biodegradable aliphatic polyester well suited for packaging applications. The thermal, mechanical properties of polylactic acid based nanocomposite films that were prepared by casting method with polyethylene glycol (PEG), and nano (Titanum oxide and, Silver) were studied. FTIR of PLA blend and nanocomposite were successfully to appear the miscibility and structure of blend and nanocomposites. The mechanical properties of PLA/PEG blend was show that the tensile strength and modulus of the blends decreased with addition of PEG for 6.3MPa and 1.2GPa respectively. The increase in elongation % that mean improved the ability of PLA to plastic deformation The Young modulus of PLA/PEG/nano filler composites showed improvement while nano (TiO2 and Ag) concentration was at 5% wt (2.6 and 3.1) GPa respectively. The blend of PLA/PEG up to 80/20 incorporation reduced the( Tg) pf neat PLA from (52 to 40) C° and were increased in (TiO2 and ,Ag) nano composites significantly (55, 60)C° respectively.