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- Title
The effect of the presence of a macromolecular organophosphorus flame retardant, poly(N‐[3‐oxopropylmethylphosphinate]ethyleneimine), on the flammability, thermal stability, and mechanical properties of polyamides.
- Authors
Helmy, Mina; Ullmann, Jason; Adner, David; Otto, Tobias; Schadewald, Anke
- Abstract
A macromolecular halogen‐free flame retardant, poly(N‐[3‐oxopropylmethylphosphinate]ethyleneimine) (PN) has been developed. This material contains both phosphorus and nitrogen. A simple and scalable process for chemical synthesis on commercial scale is described. FTIR, 1H and 31P NMR spectroscopy were utilized for characterization. The compound has a glass transition temperature of 82°C and is thermally stable up to 330°C. Samples of polyamide 6 containing 1 to 10 wt% of PN were prepared in a kneader. The flammability of polyamide 6/PN blends was investigated using the UL 94 vertical fire test, limiting oxygen index measurements, cone calorimetry, and the glow wire test. Samples containing loadings of 1 wt% and 10 wt% PN have V‐2 and V‐0 ratings, respectively. Specimen containing polyamide 12/PN blends were prepared by extrusion and injection molding for mechanical characterization.
- Subjects
FIREPROOFING agents; POLYAMIDES; CHEMICAL processes; THERMAL stability; FLAMMABILITY; GLASS transition temperature
- Publication
Fire & Materials, 2023, Vol 47, Issue 2, p241
- ISSN
0308-0501
- Publication type
Article
- DOI
10.1002/fam.3092