A Continuous Foaming Process of Low-Density PLA by Supercritical CO2 Assisted Extrusion

Swann Gay; Martial Sauceau; Élisabeth Rodier; Jacques Fages

A Continuous Foaming Process of Low-Density PLA by Supercritical CO2 Assisted Extrusion

Swann Gay ¹ Martial Sauceau ² Élisabeth Rodier ² Jacques Fages ²

1 MINT - Micro et Nanomédecines Translationnelles

2 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

Abstract : Polylactic acid (PLA) represents probably one the most viable environmentally-sustainable alternative to petrochemical-based plastics. This paper reports the continuous processing of PLA foams with CO 2 as the blowing agent. Different operating conditions were tested for a commercial linear PLA and the obtained foams were characterized on the basis of porosity and thermal properties. Finally, foams with expansion ratio up to 95% were obtained. The importance of the operating temperatures was emphasized, what requires the use of high CO 2 fractions. Higher crystalline contents than the raw material can be obtained, this content being linked to the process conditions and thus to the porosity.

Document type :

Conference papers

Domain :

Engineering Sciences [physics] / Chemical and Process Engineering

Chemical Sciences / Polymers

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https://hal-mines-albi.archives-ouvertes.fr/hal-01729581
Contributor : Jacques Fages <>
Submitted on : Monday, March 12, 2018 - 4:22:38 PM
Last modification on : Saturday, May 11, 2019 - 1:20:40 AM

Gay-Marseille-2014.pdf

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