1. Influence of the Phase Morphology on the Weldability of PLA/PBAT-Blends by Using Butt-Welding.
- Author
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Goebe, L. and Bonten, C.
- Subjects
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BIODEGRADABLE plastics , *WELDABILITY , *MIXTURES , *WELDING , *EXTRUSION process , *TENSILE tests , *INJECTION molding of plastics - Abstract
The material development in the field of bioplastics is steadily increasing. It is important to examine the processability but the Investigation of further process steps is also very important. In this paper the weldability of bioplastics is discussed. Compounds of Polylactide (PLA) and Polybutyleneadipate-terephthalate (PBAT) are produced by a twin screw extruder with different mixing ratios. Tensile specimens are produced by injection moulding and the tensile tests are carried out. In order to verify the weldability, some tensile specimens are cut in halfes and butt welded. Afterwards a tensile test is performed with the welded samples and the results are compared with the values of the unwelded samples. For understanding the results, the morphology of the welds were examined and correlated. It has been found that blends with a mixing ratio of 50:50 have the lowest welding factor, because of the immiscibility of PLA and PBAT. Weld images show segregated areas that reduce the force transmission. [ABSTRACT FROM AUTHOR] more...
- Published
- 2014
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