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Zhao Y.,Changchun University of TechnologyChangchun130012 China | Lang X.,Changchun University of TechnologyChangchun130012 China | Pan H.,Changchun University of TechnologyChangchun130012 China | Wang Y.,Changchun University | And 4 more authors.
Polymer Engineering and Science

Poly(lactic acid) (PLA) was plasticized with acetyl tributyl citrate (ATBC). The plasticized PLA was further blended with poly(ethylene octene) grafted with glycidyl methacrylate (POE-g-GMA denoted as GPOE) using a twin-screw extruder and the extruded samples were blown using the blown thin film technique. Both ATBC and GPOE significantly influenced the physical properties of the films. Compared to neat PLA, the elongation at break and tear strength of the films were significantly improved. The cavitation and large plastic deformation observed in films subjected to the tear test were the important energy-dissipation process, which led to a torn PLA film. Moreover, the PLA/ATBC/GPOE blown films had better transparency and water tolerance than that of neat PLA. GPOE could act as a tear resistance modifier for PLA blown films. These findings contributed new knowledge to the additives area and gave important implications for designing and manufacturing polymer packaging materials. © 2015 Society of Plastics Engineers. Source

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