Production of biodegradable foams using supercritical CO2

C. A. Kelly; Shona Murphy; A. Hillerström; J. Gilling; S. Massoudi; M. J. Jenkins; G. A. Leeke

doi:10.1080/03602559.2014.886114

Production of biodegradable foams using supercritical CO2

C. A. Kelly, Shona Murphy, A. Hillerström, J. Gilling, S. Massoudi, M. J. Jenkins, G. A. Leeke

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Abstract

A single screw extrusion process in which CO2 is injected into the polymer melt has been utilised to produce low density biodegradable poly(DL‐lactic acid (PDLLA) foams. High pressure differential scanning calorimetry (DSC) is used to observe the melting point depression of crystalline PDLLA 3051D in the presence of CO2. In addition, the effect of temperature (110 to 140 °C) and CO2 pressure (50 to 120 bar) on the viscosity of PDLLA 3051D, in the amorphous and crystalline forms, are investigated through the use of a high pressure rheometer. Foams of PDLLA 3051D are produced in a static environment, under a range of conditions, and these data are utilised to extrude PDLLA 3051D into foamed sheets for packaging applications. The density, crystallinity, mechanical properties and microstructure of these foams are evaluated using DSC, tensile testing and scanning electron microscopy (SEM).

Original language	English
Pages (from-to)	1169-1177
Number of pages	9
Journal	Polymer - Plastics Technology and Engineering
Volume	53
Issue number	11
Early online date	25 Jun 2014
DOIs	https://doi.org/10.1080/03602559.2014.886114
Publication status	Published - 5 Aug 2014

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10.1080/03602559.2014.886114

Kelly_et al_Production of biodegradable foams_Journal of Polymer-Plastics Technology and Engineering.2014
This is an Accepted Manuscript of an article published by Taylor & Francis in Polymer-Plastics Technology and Engineering on 5 Aug 2014, available online: http://wwww.tandfonline.com/doi/abs/10.1080/03602559.2014.886114. Eligibility for repository: Checked 02/06/2015
Accepted author manuscript, 1.09 MBLicence: Other (please specify with Rights Statement)

http://www.tandfonline.com/doi/abs/10.1080/03602559.2014.886114

Cite this

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title = "Production of biodegradable foams using supercritical CO2",

abstract = "A single screw extrusion process in which CO2 is injected into the polymer melt has been utilised to produce low density biodegradable poly(DL‐lactic acid (PDLLA) foams. High pressure differential scanning calorimetry (DSC) is used to observe the melting point depression of crystalline PDLLA 3051D in the presence of CO2. In addition, the effect of temperature (110 to 140 °C) and CO2 pressure (50 to 120 bar) on the viscosity of PDLLA 3051D, in the amorphous and crystalline forms, are investigated through the use of a high pressure rheometer. Foams of PDLLA 3051D are produced in a static environment, under a range of conditions, and these data are utilised to extrude PDLLA 3051D into foamed sheets for packaging applications. The density, crystallinity, mechanical properties and microstructure of these foams are evaluated using DSC, tensile testing and scanning electron microscopy (SEM). ",

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AU - Kelly, C. A.

AU - Murphy, Shona

AU - Hillerström, A.

AU - Gilling, J.

AU - Massoudi, S.

AU - Jenkins, M. J.

AU - Leeke, G. A.

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AB - A single screw extrusion process in which CO2 is injected into the polymer melt has been utilised to produce low density biodegradable poly(DL‐lactic acid (PDLLA) foams. High pressure differential scanning calorimetry (DSC) is used to observe the melting point depression of crystalline PDLLA 3051D in the presence of CO2. In addition, the effect of temperature (110 to 140 °C) and CO2 pressure (50 to 120 bar) on the viscosity of PDLLA 3051D, in the amorphous and crystalline forms, are investigated through the use of a high pressure rheometer. Foams of PDLLA 3051D are produced in a static environment, under a range of conditions, and these data are utilised to extrude PDLLA 3051D into foamed sheets for packaging applications. The density, crystallinity, mechanical properties and microstructure of these foams are evaluated using DSC, tensile testing and scanning electron microscopy (SEM).

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JO - Polymer - Plastics Technology and Engineering

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Production of biodegradable foams using supercritical CO2

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