Oxidative degradation of polylactide (PLA) and its effects on physical and mechanical properties
Article dans une revue avec comité de lecture
Author
RASSELET, DamienRUELLAN, AlexandreGUINAULT, AlainMIQUELARD-GARNIER, GuillaumeSOLLOGOUB, Cyrille 
FAYOLLE, BrunoAbstract
The thermo-oxidative degradation of polylactide (PLA) films was studied between 70 and 150 C. It was shown that the oxidative degradation of PLA leads to a random chain cission responsible for a reduction of the molar mass. These molar mass changes affect Tg and the degree of crystallinity, and it was found that Tg decreases according to the Fox–Flory theory whereas the degree of crystallinity increases due to a chemicrystallization process. A correlation between molar mass and strain at break during oxidation has been established: PLA displays a brittle behavior when Mn falls below 40 kg mol 1 in agreement with relationships linking the critical value for embrittlement with the molar mass between entanglements.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lecture(MDPI, 2021)The barrier performance and structural lightening of organic materials are increasingly desired and constitute a major challenge for manufacturers, particularly for transport and packaging. A promising technique which tends ...
-
Article dans une revue avec comité de lecture; ; ; ; ; ;REGNIER, Gilles (Elsevier, 2013)
A potential advantage of platelet-like nanofillers as nanocomposite reinforcements is the possibility of achieving two-dimensional stiffening through planar orientation of the platelets. The ability to achieve improved ...
-
Article dans une revue avec comité de lecture(Wiley-VCH Verlag, 2013)Blending poly(lactic acid) (PLA) with a small amount of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV; 10 wt%) using a custom multilayer co-extrusion process increases both ductility and gas barrier properties of ...
-
Article dans une revue avec comité de lecture(Elsevier, 2013)Multilayer coextrusion was used to disperse Carbon Nanotubes (CNT) in polypropylene (PP). The dilution of commercially available masterbatches using a twin-screw extruder was first applied to produce several formulations, ...
-
Article dans une revue avec comité de lecture(Elsevier, 2017)The transport properties were specifically investigated from water and gas permeation kinetics, and the corresponding permeation parameters were determined. The confinement effect of MXD6 in the multilayer structure was ...