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Reactive extrusion: A useful process to manufacture structurally modified PLA/o-MMT composites
Cailloux, Jonathan; Bin Raja-Nazri, Raja Nazrul Hakim; Santana Pérez, Orlando Onofre; Bou, Jordi; Abt, Tobias Martin; Sánchez Soto, Miguel; Carrasco, Felix; Maspoch Rulduà, Mª Lluïsa
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. POLY2 - Polyfunctional polymeric materials
In the present work, poly(lactic acid) (PLA) sheets reinforced with organically modified montmorillonite (o-MMT) were manufactured through reactive extrusion-calendering using a masterbatch approach in a pilot plant. Reaction monitoring analysis suggests the occurrence of premature reactions between o-MMT and the reactive agent; lowering further structural changes in the polymeric matrix. While calendered sheets exhibited a homogenous and preferential distribution of clay particles in MD, the coexistence of mixed structures, involving tactoids of various sizes as well as intercalated clay layers was observed. However, a higher and finer dispersion of o-MMT particles was achieved through clay–polymer tethering via chain extender molecules. Under tensile loading, the aforementioned clay dispersion enhanced multiple cavitation processes, notably improving PLA shear flow.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Polymers
Biocomposite
Mechanical properties
Process monitoring
Extrusion
Polímers
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/submittedVersion
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