Effect of the viscosity ratio on the PLA/PA10.10 bioblends morphology and mechanical properties
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PLA bio-blends with a predominantly biosourced PA10.10 in the composition range 10-50wt.% were prepared by melt blending in order to overcome the advanced brittleness of PLA. Due to the inherent immiscibility of the blends, 30 wt.% of PA was needed to achieve a brittle-to-ductile transition and a co-continuous morphology was predicted at 58 wt.% of PA. The initial enhancement of the PLA rheological behaviour through the environmentally friendly reactive extrusion process yielded a finer and more homogeneous microstructure and hence enhanced the mechanical properties of the bio-blends at much lower PA contents. The brittle-to-ductile transition could be achieved with only 10 wt.% and co-continuity was observed already at 44 wt.% of PA. Results indicate the significant potential of modifying PLA flow behaviour as a promising green manufacturing method toward expanding PLA-based bio-blends applications.
CitationCailloux, J., Abt, T., Garcia, V., Santana, O., Sanchez-Soto, M., Carrasco, F., Maspoch, M. Effect of the viscosity ratio on the PLA/PA10.10 bioblends morphology and mechanical properties. "Express polymer letters", 30 Gener 2018, vol. 12, núm. 6, p. 569-582.