Article (Scientific journals)
Tailoring and Long-Term Preservation of the Properties of PLA Composites with "Green" Plasticizers.
Murariu, Marius; Paint, Yoann; Murariu, Oltea et al.
2022In Polymers, 14 (22), p. 4836
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Keywords :
anhydrite II (AII); calcium sulfate; chain extender (CE); composites; film aging; melt rheology; plasticizer; poly(lactic acid) PLA; reactive extrusion (REX); thermal and mechanical properties; toughness; tributyl citrate (TBC); Anhydrite II; Chain extender; Chain extenders; Poly lactic acid; Poly lactide; Poly(lactic acid) polylactide; Reactive extrusion; Reactive extrusions; Tributyl citrate; Chemistry (all); Polymers and Plastics; General Chemistry
Abstract :
[en] Concerning new polylactide (PLA) applications, the study investigates the toughening of PLA-CaSO4 β-anhydrite II (AII) composites with bio-sourced tributyl citrate (TBC). The effects of 5-20 wt.% TBC were evaluated in terms of morphology, mechanical and thermal properties, focusing on the enhancement of PLA crystallization and modification of glass transition temperature (Tg). Due to the strong plasticizing effects of TBC (even at 10%), the plasticized composites are characterized by significant decrease of Tg and rigidity, increase of ductility and impact resistance. Correlated with the amounts of plasticizer, a dramatic drop in melt viscosity is also revealed. Therefore, for applications requiring increased viscosity and enhanced melt strength (extrusion, thermoforming), the reactive modification, with up to 1% epoxy functional styrene-acrylic oligomers, was explored to enhance their rheology. Moreover, larger quantities of products were obtained by reactive extrusion (REX) and characterized to evidence their lower stiffness, enhanced ductility, and toughness. In current prospects, selected samples were tested for the extrusion of tubes (straws) and films. The migration of plasticizer was not noted (at 10% TBC), whereas the mechanical and thermal characterizations of films after two years of aging evidenced a surprising preservation of properties.
Research center :
CIRMAP - Centre d'Innovation et de Recherche en Matériaux Polymères
Disciplines :
Materials science & engineering
Author, co-author :
Murariu, Marius ;  Laboratory of Polymeric and Composite Materials, Materia Nova Materials R&D Center & UMons Innovation Center, 3 Avenue Copernic, 7000 Mons, Belgium
Paint, Yoann ;  Université de Mons - UMONS
Murariu, Oltea ;  Université de Mons - UMONS
Laoutid, Fouad  ;  Université de Mons - UMONS
Dubois, Philippe  ;  Université de Mons - UMONS
Language :
English
Title :
Tailoring and Long-Term Preservation of the Properties of PLA Composites with "Green" Plasticizers.
Publication date :
10 November 2022
Journal title :
Polymers
ISSN :
2073-4360
Publisher :
MDPI, Switzerland
Volume :
14
Issue :
22
Pages :
4836
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S816 - Matériaux Polymères et Composites
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
Toro Gips S.L.
Materia Nova R&D Center
Funding text :
This research was funded by Toro Gips S.L. (Barcelona, Spain), grant “TOROGYPS”, and by Materia Nova R&D Center using internal funding.
Available on ORBi UMONS :
since 12 January 2023

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