Journal
MATERIALS
Volume 8, Issue 10, Pages 7106-7117Publisher
MDPI AG
DOI: 10.3390/ma8105360
Keywords
polylactic acid; nanocomposites; nanoadditive; melt strength enhancer; reprocess; rheology; mechanical; viscosity; extrusion compounding
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Funding
- Ministerio de Economia y Competitividad of Spain [PTQ-12-05223]
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The aim of this research paper is to study the behaviour of a common used biopolymer (Poly(Lactic Acid) (PLA)) after several reprocesses and how two different types of additives (a melt strength enhancer and a nanoadditive) affect its mechanical and rheological properties. Systematic extraction of extrudate samples from a twin-screw compounder was done in order to study the effect in the properties of the reprocessed material. Detailed rheological tests on a capillary rheometer as well as mechanical studies on a universal tensile machine after preparation of injected specimens were carried out. Results evidenced that PLA and reinforced PLA materials can be reprocessed and recycled without a remarkable loss in their mechanical properties. Several processing restrictions and specific phenomena were identified and are explained in the present manuscript.
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