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Star-Shaped Crosslinker for Multifunctional Shape Memory Polyurethane
- Source :
- Polymers, Volume 12, Issue 4, Polymers, Vol 12, Iss 4, p 740 (2020)
- Publication Year :
- 2020
-
Abstract
- Star-shaped cyclophosphazene (ACP) was employed as covalent crosslinker to form a rigid segment in polyurethanes network, to enhance the mechanical performance and to add extra flame retardant property. The effects of different ACP contents on the shape memory ability and fire resistance performance of polyurethane (PU) were studied. Tensile tests suggested high flexibility of the PUs with the maximum elongation-at-break of 161.59%. Dynamic mechanical analysis (DMA) indicated good shape recovery ratio of 72.58% after more than three repeated cycles. Under thermal treatment, the temporary shape could recover to its original state in 10 s. The peak heat release rate (pHRR), total heat released (THR) and temperature at pHRR (Tp) of flame-retardant shape memory polyurethane (FSPU) by micro-combustion calorimeter (MCC) was as low as 183.2 W/g, 21.4 KJ/g, 330.8 &deg<br />C respectively, suggesting good inherent fire-resistant performance. As amine-containing crosslinkers are one of the most common building units in thermosetting polymers, we anticipate that our finding will have significant benefits beyond shape memory and fire-resistance.
- Subjects :
- chemistry.chemical_classification
Materials science
flame retardance
Polymers and Plastics
shape memory
polyurethanes
Thermosetting polymer
General Chemistry
Shape-memory alloy
Polymer
Dynamic mechanical analysis
Article
Calorimeter
lcsh:QD241-441
chemistry.chemical_compound
lcsh:Organic chemistry
chemistry
Ultimate tensile strength
cyclophosphazene
Composite material
crosslinker
Fire retardant
Polyurethane
Subjects
Details
- ISSN :
- 20734360
- Volume :
- 12
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....01285009204092c389fabbdc943bbc38