A new approach to improve the efficiency of intumescent flame retardant for polypropylene fibers
Issued Date
2025-09-01
Resource Type
ISSN
01253395
Scopus ID
2-s2.0-105029500974
Journal Title
Songklanakarin Journal of Science and Technology
Volume
47
Issue
5
Start Page
349
End Page
357
Rights Holder(s)
SCOPUS
Bibliographic Citation
Songklanakarin Journal of Science and Technology Vol.47 No.5 (2025) , 349-357
Suggested Citation
Ruenpakdan P., Srikhirin T., Mougin K., Valla M.F., Duquesne S., Amornsakchai T. A new approach to improve the efficiency of intumescent flame retardant for polypropylene fibers. Songklanakarin Journal of Science and Technology Vol.47 No.5 (2025) , 349-357. 357. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/115067
Title
A new approach to improve the efficiency of intumescent flame retardant for polypropylene fibers
Author's Affiliation
Corresponding Author(s)
Other Contributor(s)
Abstract
This study introduces an improved approach to enhance polypropylene (PP) flame retardancy. High intumescent flame retardant (IFR) loadings (30 wt%) often compromise PP's mechanical properties. The research investigates the impact of different mixing sequences, including novel direct and multi-step methods, on the flame retardancy and properties of PP/IFR-silane composites. Composites, prepared via a two-roll mill and melt-spun into fibers, showed significant performance improvement with a proper multi-step mixing sequence (M-1) where ammonium polyphosphate (APP) particles were pre-treated with silane. This approach allowed reducing IFR content from 30 wt% to 25 wt% while maintaining a V0 UL94-V rating. The M-1 sequence resulted in silane strongly coating APP and enhancing thermal stability because of reduced phosphorus degradation and strong C-N and C=N bond formation, indicating enhanced chemical interactions. Rheological analysis also showed greater early-stage char expansion, improving polymer protection during combustion. The PP/mod-IFR composite fibers exhibited homogeneous additive distribution and chemical compatibility.