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Chinese Journal of Polymer Science

, Volume 36, Issue 9, pp 1055–1062 | Cite as

Effects of Binding Energy of Bioinspired Sacrificial Bond on Mechanical Performance of cis-1,4-Polyisoprene with Dual-crosslink

  • Sheng Wang
  • Zheng-Hai Tang
  • Jing Huang
  • Bao-Chun Guo
Article
  • 45 Downloads

Abstract

Although bioinspired sacrificial bonds have been demonstrated to be efficient in improving the mechanical properties of polymer materials, the effect of binding energy of a specific dynamic bond on the ultimate mechanical performance of a polymer network with dual-crosslink remains unclear. In this contribution, diamine and sulfur curing package are introduced simultaneously into a sulfonated cis-1,4-polyisoprene to create dually-crosslinked cis-1,4-polyisoprene network with sulfonate-aminium ionic bonds as the sacrificial bonds. Three diamines (primary, secondary and tertiary) with the same spacer between the two nitrogen atoms are used to create the ionic bonds with different binding energies. Although the binding energy of ionic bond does not affect the glass transition temperature of cis-1,4-polyisoprene (IR), it exerts definite influences on strain-induced crystallization and mechanical performance. The capabilities of diamine in dissipating energy, promoting strain-induced crystallization and enhancing the mechanical performance are in the same order of secondary diamine > primary diamine > tertiary diamine. The variations in mechanical performances are correlated to the binding energy of the ionic bond, which is determined by pKa values.

Keywords

cis-1,4-Polyisoprene Ionic bond Sacrificial bond Binding energy Strain-induced crystallization 

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Notes

Acknowledgments

This work was financially supported by the National Basic Research Program of China (No. 2015CB654700 (2015CB654703)), the National Natural Science Foundation of China (Nos. 51673065, 51703064, 51473050 and 51333003) and Fundamental Research Funds for the Central Universities (No. 2017PY006).

Supplementary material

10118_2018_2131_MOESM1_ESM.pdf (405 kb)
Effects of Binding Energy of Bioinspired Sacrificial Bond on Mechanical Performance of cis-1,4-Polyisoprene with Dual-crosslink

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Sheng Wang
    • 1
  • Zheng-Hai Tang
    • 1
  • Jing Huang
    • 1
  • Bao-Chun Guo
    • 1
  1. 1.Department of Polymer Materials and EngineeringSouth China University of TechnologyGuangzhouChina

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