This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1016/j.polymer.2016.01.077 in citations.
Please use the identifier: http://hdl.handle.net/2128/12692 in citations.
Sacrificial bonds enhance toughness of dual polybutadiene networks
Sacrificial bonds enhance toughness of dual polybutadiene networks
A new dual network elastomer is developed that consists of polybutadiene crosslinked with both permanent and transient bonds. The transient network is formed by the association of urazole groups that are randomly attached to the polymer backbone. Subsequent orthogonal covalent crosslinking through h...
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Personal Name(s): | Gold, Barbara |
---|---|
Hövelmann, Claas (Corresponding author) / Weiss, Christine / Radulescu, Aurel / Allgaier, J. / Pyckhout-Hintzen, Wim / Wischnewski, Andreas / Richter, Dieter | |
Contributing Institute: |
Neutronenstreuung; ICS-1 Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Polymer, 87 (2016) S. 123 - 128 |
Imprint: |
Oxford
Elsevier Science
2016
|
DOI: |
10.1016/j.polymer.2016.01.077 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ Soft Matter, Health and Life Sciences |
Subject (ZB): | |
Link: |
Published on 2016-08-11. Available in OpenAccess from 2017-08-11. Published on 2016-08-11. Available in OpenAccess from 2017-08-11. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/12692 in citations.
A new dual network elastomer is developed that consists of polybutadiene crosslinked with both permanent and transient bonds. The transient network is formed by the association of urazole groups that are randomly attached to the polymer backbone. Subsequent orthogonal covalent crosslinking through hydrosilylation in the melt state leads to a dual network with variable permanent and transient crosslinking density. Small angle neutron scattering (SANS) investigations show a homogeneous distribution of the transient bonds in both the functionalized polymers and the dual network products. The enhanced mechanical properties of the dual networks compared to conventional polybutadiene elastomers are characterized by stress–strain measurements. The increased toughness can be explained by a protective mechanism where the weaker supramolecular bonds act as sacrificial bonds that dissipate energy |