Impact of crystallinity of poly(lactide) on helium and oxygen barrier properties

Guinault, Alain; Sollogoub, Cyrille; Ducruet, Violette; Domenek, Sandra

doi:10.1016/j.eurpolymj.2012.01.014

Cited by 97 publications

(83 citation statements)

References 42 publications

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“…The implicit confinement of the MAF results in a large broadening and shift of the T g , from about 54°C (for amorphous ndPLA-C pellets) to about 62°C (for semi crystalline dPLA-C pellets). These results are in agreement with data reported by Guinault et al [54] for the crystallization of PLA 2002D at 85°C (4.3% of D-lactide).…”

Section: Thermal Propertiessupporting

confidence: 93%

Characterisation of low-odour emissive polylactide/cellulose fibre biocomposites for car interior

Courgneau¹,

Rusu²,

Henneuse³

et al. 2013

Express Polym. Lett.

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Abstract. Low odour-emissive polylactide/cellulose fibre biocomposites, intended for car interior, were prepared and characterised. The impact of the different stages of processing (drying cycles, compounding, injection moulding) on the extent of polylactide degradation and on biocomposites properties was investigated by size exclusion chromatography, thermogravimetry, differential scanning calorimetry. In parallel, the odour emission of these materials was quantified via dynamic dilution olfactometry and Field of odours ® method. The changes in molecular weight and global odour emission indicated that compounding had a strong impact on polylactide degradation and odour emission, while injection moulding had no significant impact. Adding 0.5 wt% of an absorbent agent based on poly(1-methylpyrrol-2-ylsquaraine could) divide the global odour concentration by a factor 2. The morphology, mechanical and thermal properties of injection moulded PLAbiocomposites were not affected by the presence of the absorbent agent.

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Section: Thermal Propertiessupporting

confidence: 93%

Characterisation of low-odour emissive polylactide/cellulose fibre biocomposites for car interior

Courgneau¹,

Rusu²,

Henneuse³

et al. 2013

Express Polym. Lett.

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“…Neat PLA oxygen barrier properties are in accordance with published data [54,[60][61][62][63][64][65]. Interestingly, the inclusion of at least 10 wt% of lignin yielded a decrease in oxygen permeability of around 20 %.…”

Section: Composite Materials Characteristicssupporting

confidence: 90%

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract Due to their polyphenolic structure lignins bear a number of interesting functional properties, such as antioxidant activity. Natural antioxidants are very much looked for in the aim of protection of light or oxygen sensitive goods and are being used in active packaging. Poly(lactide) (PLA)-lignin films were prepared by twin screw extrusion followed by thermo-compression using two different commercial sources of alkali lignins obtained from gramineous plants. A good dispersion of lignin in the matrix was observed. Mechanical properties of the compounded material were merely diminished and oxygen barrier properties slightly enhanced. The chromatographic study of the lignins revealed that the low molecular weight fraction of both lignins increased during the polymer processing. The migration of low molecular weight compounds in an ethanol/water solution simulating fatty foodstuff was performed and the antioxidant activity of the extract was analysed. It was found that the activity increases with increasing severity of the heat treatment because of the generation of free phenolic monomers during processing. These results open an interesting way for application of lignins as an active compound in packaging materials. Lignins do not impair the mechanical and barrier performance of the polymer and the plastics processing even allows for the generation of active substances.

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“…The analytical solution of Fick's law in a case of an infinite plate of thickness L with penetrant at a C s concentration on one edge and 0 at the other allows to determine the diffusion coefficient of oxygen by the equation [9,10]:…”

Section: Permeabilitymentioning

confidence: 99%

Kinetic analysis of polydicyclopentadiene oxidation

Defauchy

Gac

Guinault

et al. 2017

Polymer Degradation and Stability

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. b s t r a c tThe in situ thermal oxidation of thin unstabilized polydicyclopentadiene was studied by TGA to monitor mass gain, and DSC to characterize hydroperoxides concentration. Results were discussed using kinetic analysis, which allowed the estimation of activation energies for key reactions of the oxidation process. Activation energy for termination was shown to be higher than in hydrocarbon liquids, which was discussed from the theory of diffusion controlled reactions, and a possible link with local motions associated with sub-glassy transition. Activation energy of thermal decomposition of hydroperoxides was found lower than for model hydroperoxides, suggesting an accelerating effect of organometallic catalysts. Despite those two results that indicate a poor thermal stability of thin pDCPD films, measurements of oxygen diffusivity at several temperatures show that oxidation remains confined in a relatively thin surface layer which would allow the pDCPD properties to be preserved.

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Impact of crystallinity of poly(lactide) on helium and oxygen barrier properties

Cited by 97 publications

References 42 publications

Characterisation of low-odour emissive polylactide/cellulose fibre biocomposites for car interior

Characterisation of low-odour emissive polylactide/cellulose fibre biocomposites for car interior

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Kinetic analysis of polydicyclopentadiene oxidation

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