Cassava starch was melt-blended with glycerol(7o/30 wt%/wt%) at 140 c to prepare thermoplastic starch (TPS). Chitosan (CTS) was premixed with starch and glycerol in acidified water (lactic acid 2 wt%x), at 1, 5 and 10 wt%/wt%. TPS/CTs was then melt-blended (160 เซลเซียส) with polyethylene-graft-maleic anhydride (PE-MAH). determination and scanning electron microscopy indicated TPSlPE-MAH/CTs had a co- continuous morphology and CTS-induced phase inversion to give dispersed PE-MAH particles in TPS matrix, Tensile strength at break and elongation, melt viscosity, fracture toughness and water contact angle of TPSIPE-MAH were improved by CTS incorporation TPS/PE-MAHICTS blends decreased the melt- ing temperature of TPS and PE-MAH compared to the neat polymers. FTIR confirmed a reaction had occurred between amino groups NHz) of CTS and the MAH groups of PE-MAH This reaction and the enhanced miscibility between TPS and CTs improved the mechanical properties of the TPslPE-MAH/CTS blend, particularly at 5wtx/wt CTS. D 2016 Elsevier Ltd. All rights reserved.