Preparation and characterization of (polylactide) /( polyethylene glycol ) blends

PLA has great potentials to be processed into films for packaging application.However ,fim production is difficult to carry out due to the brittleness and low melt strength of PLA. In this investigation , poly lactide acid(PLA) and polyethylene glycol(PEG) were melt mixed in an internal mixer.The effect of PEG content on thermal and mechanical properties of PLA/PEG blends wereinvestigated. The inclusion of low molecular weight PEG into PLA resulted to lower glass transition temperature.In relation to plasticizer content , the impact resitance was increased, whereas a decreas in glass transition temperature and lower stiffness was observed

Keywords:

Polylactide , poly(ethylene glycol) , mechanical properties , thermal properties , plasticizr