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Making insoluble polymer networks malleable via olefin metathesis.

Authors
  • Lu, Yi-Xuan
  • Tournilhac, François
  • Leibler, Ludwik
  • Guan, Zhibin
Type
Published Article
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society
Publication Date
May 23, 2012
Volume
134
Issue
20
Pages
8424–8427
Identifiers
DOI: 10.1021/ja303356z
PMID: 22568481
Source
Medline
License
Unknown

Abstract

Covalently cross-linked polymers have many technological applications for their excellent properties, but they suffer from the lack of processability and adaptive properties. We report a simple, efficient method of generating adaptive cross-linked polymers via olefin metathesis. By introducing a very low level of the Grubbs' second-generation Ru metathesis catalyst, a chemically cross-linked polybutadiene network becomes malleable at room temperature while retaining its insolubility. The stress relaxation capability increases with increasing level of catalyst loading. In sharp contrast, catalyst-free control samples with identical network topology and cross-linking density do not show any adaptive properties. This chemistry should offer a possibility to combine the dimensional stability and solvent resistance of cross-linked polymers and the processability/adaptibility of thermoplastics.

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