A method for simultaneously improving the flame retardancy and toughness of PLA
| Autor: | De-Yi Wang, Yan-Peng Song, Yu-Zhong Wang, Xiu-Li Wang, Ling Lin |
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| Rok vydání: | 2010 |
| Předmět: |
Thermogravimetric analysis
Materials science Polymers and Plastics technology industry and agriculture macromolecular substances respiratory system Limiting oxygen index chemistry.chemical_compound stomatognathic system chemistry Blowing agent Cone calorimeter PEG ratio lipids (amino acids peptides and proteins) Charring Composite material Ammonium polyphosphate Fire retardant |
| Zdroj: | Polymers for Advanced Technologies. 22:2295-2301 |
| ISSN: | 1042-7147 |
| DOI: | 10.1002/pat.1760 |
| Popis: | In order to modify the brittleness and flame retardant properties of poly(lactic acid) (PLA), a series of flame retardant toughened PLA composites were prepared using poly(ethylene glycol) 6000 (PEG6000) as a toughening and charring agent together with ammonium polyphosphate (APP) as an acid source and blowing agent. The fire and thermal behavior of PLA/PEG/APP composites was evaluated by limiting oxygen index (LOI), UL-94, cone calorimeter, and thermogravimetric analysis (TGA). The results showed that the PLA/PEG/APP system had good charring ability and could improve the flame retardancy of PLA. When the content of APP in the composites was more than 5 wt%, all samples could reach UL-94 V-0 rating. The results of mechanical property tests demonstrated that the brittleness of PLA was also improved after blended with PEG6000. All the PLA/PEG/APP composites with an APP content of less than 10 wt% showed an obvious neck and fracture behavior, that is, the tensile behavior of PLA was changed from brittle to ductile. Copyright © 2010 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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