The physicochemical properties of neat PLA and sample exposed to gamma irradiation were investigated using Fourier Transform Infrared Spectroscopy(FTIR),X-ray diffraction (XRD),gel permeation chromatography(GPC),differential scanning calorimetry(DSC),thermogravimetric analysis(TGA),scanning electron microscopy (SEM) and tensile measurements. Results show as the dose increases,the molecular weight(Mw), melting temperature(Tm),