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Autonomic healing of thermoplastic elastomer composed of triblock copolymer
- Source :
- Journal of Materials Science. 52:1214-1220
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- In this paper, we demonstrated that commercially available triblock copolymers such as polystyrene-b-polybutadiene-b-polystyrene (SBS) and polystyrene-b-polyisoprene-b-polystyrene (SIS), used as thermoplastic elastomers, exhibit autonomic self-healing behavior at room temperature without any chemical reaction even after cutting into two separate pieces. The healing efficiency is improved by immediate recombination after cutting, and is attributed to the destruction of the microstructure, i.e.、 polystyrene domains, leading to marked molecular mobility. Furthermore, quenched samples with obscure phase-separation exhibit good healing behavior. Finally, SBS has better healing efficiency than SIS because the solubility parameter of polybutadiene is closer to that of polystyrene than that of polyisoprene; to some extent, the solubility parameter is responsible for enhanced molecular motion owing to the mutual dissolution of both components.
- Subjects :
- triblock copolymer
Materials science
Mechanical Engineering
viscoelastic properties
thermoplastic elastomer
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
Chemical reaction
0104 chemical sciences
Hildebrand solubility parameter
chemistry.chemical_compound
Polybutadiene
chemistry
Mechanics of Materials
Copolymer
self-healing
General Materials Science
Polystyrene
Composite material
Thermoplastic elastomer
0210 nano-technology
Dissolution
Subjects
Details
- ISSN :
- 15734803 and 00222461
- Volume :
- 52
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science
- Accession number :
- edsair.doi.dedup.....a7f0f104631e670cd8d94b60e0caf679