Effect of curing on the mechanical and healing behaviour of a hybrid dual network

A time resolved evaluation

Journal Article (2016)
Author(s)

M. Abdolah Zadeh

AM Grande (TU Delft - Novel Aerospace Materials)

S van der Zwaag (TU Delft - Novel Aerospace Materials)

S.J. García (TU Delft - Novel Aerospace Materials)

Research Group
Novel Aerospace Materials
Copyright
© 2016 M. Abdolah Zadeh, A.M. Grande, S. van der Zwaag, Santiago J. Garcia
DOI related publication
https://doi.org/10.1039/c6ra17799a
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 M. Abdolah Zadeh, A.M. Grande, S. van der Zwaag, Santiago J. Garcia
Research Group
Novel Aerospace Materials
Issue number
94
Volume number
6
Pages (from-to)
91806-91814
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Abstract

In the present work we show the effect of the crosslinking degree on the mechanical and healing behaviour of a healable thermoset dual-network polymer. A hyphenated rheological test (i.e. simultaneous rheology and FTIR) was used to follow the effect of the curing process on the mechanical behaviour in relation to the underlying chemical reactions. The effect of curing on the bulk properties and the polymer interfacial healing was studied using gap closure kinetics and a fracture mechanical test. The increased crosslinking density at longer curing times led to a more temperature-stable polymer network with significantly higher mechanical properties (elastic modulus and strength at break). It was found that the damage closure kinetics decrease with the curing degree but the ultimate interfacial healing efficiency does not. The results here reported highlight the effect of the crosslinking density on the kinetics of damage closure with a low impact on the maximum interfacial healing efficiency as long as the amount of reversible bonds remains constant.

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