Characterization and Properties of Thermoplastic Polyether Elastomer/Polyoxymethylene Blends Prepared by Melt-Mixing Method

Abstract

Thermoplastic polyester elastomer is a block copolymer comprising polyester hard segments and polyether soft segments. The soft section gives elasticity, making it rubbery; the hard section gives the same processing properties and mechanical strength as engineering plastic has. In this paper, the thermoplastic polyester elastomer/polyoxymethylene composites were prepared by melt extrusion and the content of thermoplastic polyester elastomer in the blends was 5, 10, 15, 20 and 25 wt %, respectively. The compatibility of composites was studied by DSC, FTIR, SEM and DMA. The mechanical tests showed that the notched impact strength and the elongation at break of the blends were significantly better than pure polyoxymethylene.