Hydrogen bonding network formation in epoxidized natural rubber

Reversible networks of epoxidized natural rubber (ENR) mixed with dicarboxylic acid were studied. ENR is a bio-based polymer, commercially available, and capable of sulphur vulcanisation. In addition, ENR has been already reported to exhibit self-healing characteristics after ionisation by adding io...

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Bibliographic Details
Published inPolymer bulletin (Berlin, Germany) Vol. 81; no. 7; pp. 5991 - 6002
Main Authors Sawada, Jun, Mandal, Subhradeep, Das, Amit, Heinrich, Gert, Tada, Toshio
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2024
Springer Nature B.V
Subjects
Acids
Autonomous vehicles
Biopolymers
Carboxyl group
Carboxylic acids
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Crack initiation
Curing
Dicarboxylic acids
Elastomers
Hydrogen bonding
Hydrogen bonds
Mechanical properties
Natural rubber
Network formation
Organic Chemistry
Original Paper
Physical Chemistry
Polymer Sciences
Polymers
Rubber
Soft and Granular Matter
Sulfur
Temperature
Tensile tests
Vulcanization
United States > US
Japan
Self-healing
Epoxidized natural rubber
Reversible network
Hydrogen bond
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Summary:Reversible networks of epoxidized natural rubber (ENR) mixed with dicarboxylic acid were studied. ENR is a bio-based polymer, commercially available, and capable of sulphur vulcanisation. In addition, ENR has been already reported to exhibit self-healing characteristics after ionisation by adding ionic groups to the epoxide group. The reversible network structure plays an essential role for self-healing behaviour, which cannot be obtained for elastomers with irreversible sulphur network. In this study, dicarboxylic acid was used to construct the reversible network. The reversible hydrogen bonds were established in such a way that firstly one carboxyl group of di-carboxylic acid (DA) is reacted to ENR and secondary the other carboxyl group of DA interacts with residual carboxyl group to form hydrogen bonds in carboxylic dimer. The self-healing behaviour was evaluated for ENR with DA by tensile tests. This self-healing system provides new insights for sustainable and natural-based materials.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-023-04968-2