Miscibility and Compatibility Enhancement of Polylactic Acid/Polypropylene Carbonate Blends Using Novel Extensional Force Based Extruder
Polypropylene carbonate (PPC)/polylactic acid (PLA) blends of five different weight ratios were synthesized using a novel extruder (NE) that worked on the principal of generating global dynamic elongational flow, instead of using a traditional twin-screw extruder (TSE) that worked on the principal of generating shear flow. The miscibility and compatibility enhancement of PPC/PLA blends were investigated using mechanical testing, scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). The mechanical properties as functions of composition and strain to stress ratio illustrated good compatibility between PPC and PLA. The phase inversion of the PPC/PLA system occurred between 70 and 50 weight % of PLA in the PPC/PLA blends. On the other hand, SEM showed that the phase inversion of the PLA/PPC system took place between 70 and 50 weight percentages of PLA in the PLA/PPC blends. WAXD revealed two sharp reflection peaks at 70% PLA content. DSC indicated that partial miscibility and compatibility of PPC and PLA. In summary, the effect of the extensional force field preparation is better than shear force field.
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Document Type: Short Communication
Publication date: September 1, 2017
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- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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