Abstract
In this study, rice starch-filled linear low-density polyethylene (LLDPE) was prepared by twin screw extrusion. The rice starch was blended in a virgin grade LLDPE and two kinds of recycled LLDPE using citric acid as a compatibilizer. It was found that the maximum content of rice starch blended into LLDPEs could not be more than 3 wt%. The ratios of starch to citric acid were 1 : 1 for extruded samples. The starch increased the melt flow index (MFI) of LLDPE, but tended to decrease the MFI of recycled LLDPE. Tensile strength and elongation at break of the LLDPE (common recycle grade) when blended with starch at 1 wt% were less by 8.2% and 9% than those of neat recycled LLDPE, respectively. Tensile strength and elongation at break of the deinked-recycled LLDPE when blended with starch at 1 wt% were less by 9.5% and 26% than those of neat deinked-recycled LLDPE, respectively.
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