Anisotropy Effects in the Shape-Memory Performance of Polymer Foams

Tilman Sauter; Karl Kratz; Samy Madbouly; Frank Klein; Matthias Heuchel; Andreas Lendlein

doi:10.1002/mame.202000730

Anisotropy Effects in the Shape-Memory Performance of Polymer Foams

Tilman Sauter, Karl Kratz, Samy Madbouly, Frank Klein, Matthias Heuchel, Andreas Lendlein

School of Engineering (Behrend)

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Isotropic and anisotropic shape-memory polymer foams are prepared by supercritical carbon dioxide foaming from a multiblock copolymer (PDLCL) consisting of poly(ω-pentadecalactone) and poly(ε-caprolactone) segments. Analysis by micro-computed tomography reveals for the anisotropic PDLCL foam cells a high shape anisotropy ratio of R = 1.72 ± 0.62 with a corresponding Young's compression moduli ratio between longitudinal and transversal direction of 4.3. The experimental compression data in the linear elastic range can be well described by the anisotropic open foam model of Gibson and Ashby. A micro-morphological analysis for single pores using scanning electron microscopy images permits the correlation between the macroscopic stress-compression behavior and microscale structural changes.

Original language	English (US)
Article number	2000730
Journal	Macromolecular Materials and Engineering
Volume	306
Issue number	4
DOIs	https://doi.org/10.1002/mame.202000730
State	Published - Apr 2021

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1002/mame.202000730

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title = "Anisotropy Effects in the Shape-Memory Performance of Polymer Foams",

abstract = "Isotropic and anisotropic shape-memory polymer foams are prepared by supercritical carbon dioxide foaming from a multiblock copolymer (PDLCL) consisting of poly(ω-pentadecalactone) and poly(ε-caprolactone) segments. Analysis by micro-computed tomography reveals for the anisotropic PDLCL foam cells a high shape anisotropy ratio of R = 1.72 ± 0.62 with a corresponding Young's compression moduli ratio between longitudinal and transversal direction of 4.3. The experimental compression data in the linear elastic range can be well described by the anisotropic open foam model of Gibson and Ashby. A micro-morphological analysis for single pores using scanning electron microscopy images permits the correlation between the macroscopic stress-compression behavior and microscale structural changes.",

author = "Tilman Sauter and Karl Kratz and Samy Madbouly and Frank Klein and Matthias Heuchel and Andreas Lendlein",

note = "Funding Information: Dr. U. N{\"o}chel is acknowledged for the WAXS measurements and its interpretation; Mr. Schossig and Mrs. Pieper for the SEM characterization; Dr. Kosmella for the investigation of the shape‐memory properties. Financial support was provided by the Helmholtz‐Association through programme‐oriented funding. T.S. is grateful to the Berlin‐Brandenburg School for Regenerative Therapies (DFG‐GSC‐203) for a fellowship. Publisher Copyright: {\textcopyright} 2021 Helmholtz-Zentrum Geesthacht. Macromolecular Materials and Engineering published by Wiley-VCH GmbH",

year = "2021",

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doi = "10.1002/mame.202000730",

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AU - Sauter, Tilman

AU - Kratz, Karl

AU - Madbouly, Samy

AU - Klein, Frank

AU - Heuchel, Matthias

AU - Lendlein, Andreas

N1 - Funding Information: Dr. U. Nöchel is acknowledged for the WAXS measurements and its interpretation; Mr. Schossig and Mrs. Pieper for the SEM characterization; Dr. Kosmella for the investigation of the shape‐memory properties. Financial support was provided by the Helmholtz‐Association through programme‐oriented funding. T.S. is grateful to the Berlin‐Brandenburg School for Regenerative Therapies (DFG‐GSC‐203) for a fellowship. Publisher Copyright: © 2021 Helmholtz-Zentrum Geesthacht. Macromolecular Materials and Engineering published by Wiley-VCH GmbH

PY - 2021/4

Y1 - 2021/4

N2 - Isotropic and anisotropic shape-memory polymer foams are prepared by supercritical carbon dioxide foaming from a multiblock copolymer (PDLCL) consisting of poly(ω-pentadecalactone) and poly(ε-caprolactone) segments. Analysis by micro-computed tomography reveals for the anisotropic PDLCL foam cells a high shape anisotropy ratio of R = 1.72 ± 0.62 with a corresponding Young's compression moduli ratio between longitudinal and transversal direction of 4.3. The experimental compression data in the linear elastic range can be well described by the anisotropic open foam model of Gibson and Ashby. A micro-morphological analysis for single pores using scanning electron microscopy images permits the correlation between the macroscopic stress-compression behavior and microscale structural changes.

AB - Isotropic and anisotropic shape-memory polymer foams are prepared by supercritical carbon dioxide foaming from a multiblock copolymer (PDLCL) consisting of poly(ω-pentadecalactone) and poly(ε-caprolactone) segments. Analysis by micro-computed tomography reveals for the anisotropic PDLCL foam cells a high shape anisotropy ratio of R = 1.72 ± 0.62 with a corresponding Young's compression moduli ratio between longitudinal and transversal direction of 4.3. The experimental compression data in the linear elastic range can be well described by the anisotropic open foam model of Gibson and Ashby. A micro-morphological analysis for single pores using scanning electron microscopy images permits the correlation between the macroscopic stress-compression behavior and microscale structural changes.

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Anisotropy Effects in the Shape-Memory Performance of Polymer Foams

Abstract

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