Cited by 305Polymer composites and self-healingAdvanced Materials and MechanicsPolymer crystallization and properties

AB-polymer networks based on oligo(ɛ-caprolactone) segments showing shape-memory properties

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Lendlein, Andreas, Schmidt, Annette M., Langer, Robert·2001·Proceedings of the National Academy of Sciences

Abstract

Although shape-memory metal alloys have wide use in medicine and other areas, improved properties, particularly easy shaping, high shape stability, and adjustable transition temperature, are realizable only by polymer systems. In this paper, a polymer system of shape-memory polymer networks based on oligo(ɛ-caprolactone) dimethacrylate as crosslinker and n -butyl acrylate as comonomer was introduced. The influence of two structural parameters, the molecular weight of oligo(ɛ-caprolactone) dimethacrylate and the weight content of n -butyl acrylate, on macroscopic properties of polymer networks such as thermal and mechanical properties has been investigated. Tensile tests above and below melting temperature showed a decrease in the elastic modulus with increasing comonomer weight content. The crystallization behavior of the new materials has been investigated, and key parameters for the programming procedure of the temporary shape have been evaluated. Shape-memory properties have been quantified by thermocyclic experiments. All samples reached uniform deformation properties with recovery rates above 99% after 3 cycles. Whereas strain recovery increased with increasing n -butyl acrylate content, strain fixity decreased, reflecting the decreasing degree of crystallinity of the material.

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Crossref · 10.1073/pnas.98.3.842

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  • N-PCLDMA-BA was able to induce angiogenesis and strong tissue integration in male Naval Medical Research Institute mice 1 week after subcutaneous implantation.

    “A SMP, N-PCLDMA-BA, based on PCLDMA and BA, was able to induce angiogenesis and strong tissue integration in male Naval Medical Research Institute mice 1 week after subcutaneous implantation [47].”

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Authors
Lendlein, A., Schmidt, A. M., & Langer, R.
Affiliations
  • Massachusetts Institute of Technology (US)
  • Institute for Technical and Macromolecular Chemistry, Rheinisch Westfälische Technische Hochschule (RWTH) Aachen, and German Wool Research Institute at RWTH Aachen e.V., Veltmanplatz 8, D-52062 Aachen, Germany; and Massachusetts Institute of Technology, Department of Chemical Engineering, 45 Carleton Street, Cambridge, MA 02139
Venue
Proceedings of the National Academy of Sciences
Published
2001-01-23
Volume
98
Issue
3
Pages
842-847
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W4240829654
Cited by
303
References
18
Citations by year
2026: 2 · 2024: 5 · 2023: 9 · 2022: 3 · 2021: 9 · 2020: 13 · 2019: 18 · 2018: 12 · 2017: 15 · 2016: 20 · 2015: 13 · 2014: 16 · 2013: 5 · 2012: 23
FWCI
7.21
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
Keywords
shape memory polymers, butyl acrylate, polymer networks, crosslinking, shape programming, crystallization behavior, strain recovery, elastic modulus, molecular weight effects

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