Fire-extinguishing characteristics and flame retardant mechanism of polylactide foams: Influence of tricresyl phosphate combined with natural flame retardant
| Autor: | Tunsuda Suparanon, Worasak Phetwarotai |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0303 health sciences
Thermogravimetric analysis Materials science Thermal decomposition Compression molding Tricresyl phosphate 02 engineering and technology General Medicine 021001 nanoscience & nanotechnology Biochemistry Limiting oxygen index 03 medical and health sciences chemistry.chemical_compound chemistry Chemical engineering Structural Biology Blowing agent 0210 nano-technology Molecular Biology Phosphoric acid 030304 developmental biology Fire retardant |
| Zdroj: | International journal of biological macromolecules. 158 |
| ISSN: | 1879-0003 |
| Popis: | Extrusion and compression molding techniques were used to process polylactide (PLA) foams using a mixture blowing agent. Tricresyl phosphate (TCP) and natural flame retardants (NFR) from pumpkin (PK) and soybean (SB) were added to rigid PLA foams and the flame retardant properties of the foams were investigated. The effects of TCP content, types and amounts of NFR, and the ratio of TCP to NFR were determined on the physical, thermal and morphological characteristics of the foams. The fire-extinguishing characteristics and flame retardant mechanism of PLA foams with TCP were studied by thermogravimetric analysis-Fourier transform infrared (TGA-FTIR), scanning electron microscope (SEM), limiting oxygen index (LOI), and UL-94 techniques. The results revealed the efficiency of TCP as a flame retardant for PLA foams. Increased TCP levels contributed to a significant enhancement in fire-extinguishing characteristics. Phosphoric acid from thermal decomposition of TCP was a key factor in the proposed mechanism of flame retardation. Flame inhibition and retarded ignition of the PLA foams were achieved at all compositions of TCP and NFR. Due to the presence of compounds such as cellulose, phosphate, and silica, both PK and SB could be used as effective NFRs for PLA foams. All these characteristics promise extended applications for PLA foam in bio, circular, and green economies. |
| Databáze: | OpenAIRE |
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