Poly(bis(phenoxy)phosphazene) (Approx Mw:400,000)

• CAS: 28212-48-8
• Catalog Number: ALC-FP-28212488
• Category: Featured Products
• Molecular Weight: Approx Mw:400,000
• Molecular Formula: (C12H10NPO2)n
• Appearance: Tan to brown chunks
• Sample Lot No.: A24Q0815
• Volatiles: ≤ 1.00%

Case Study

Poly(bis(phenoxy)phosphazene) for Electrolyte Membrane Fabrication in PEMFCs

Gutru R, et al. Solid State Ionics, 2016, 296, 127-136.

Sulfonated poly(bis(phenoxy)phosphazene) (sPOP) was synthesized via electrophilic substitution using concentrated H₂SO₄ in DMAc at 80 °C, followed by precipitation in ice-cold water, filtration, washing, and drying at 60 °C. Blend membranes were prepared by dissolving 2-4 wt.% sPOP in DMAc, followed by mixing with 2 wt.% sPEEK solution and stirring for 3 h. The homogeneous solution was cast onto Plexiglas, vacuum-dried at 80 °C for 12 h, and peeled to obtain membranes of 50-60 μm thickness. Post-treatment involved dipping in 0.5 M H₂SO₄ and washing to neutral pH. The study demonstrates sPOP's experimental application in producing acid-base blend membranes with controlled ionic conductivity, highlighting its integration into PEMFCs as an effective polymer electrolyte for proton conduction.

Poly(bis(phenoxy)phosphazene) for Solution-Diffusion Analysis of Organic Sulfur Compounds

Zhang W, et al. Journal of Industrial and Engineering Chemistry, 2015, 27, 341-346.

Poly[bis(phenoxy)phosphazene] (PBPP) was employed to investigate the solution and diffusion behavior of organic sulfur compounds. PBPP (0.5 g) was dissolved in THF, coated onto 16 g Chromosorb-G particles, and solvent-evaporated at 50 °C to obtain a uniform polymer layer. Coated particles were vacuum-dried and packed into a 200 cm stainless steel column (3 mm ID), pretreated under carrier gas at 140 °C for 12 h. Inverse gas chromatography determined infinite dilute activity coefficients and diffusion coefficients for n-heptane, thiophenes, ethyl sulfide, and butyl mercaptan. The study exemplifies PBPP's application as a stationary phase to quantitatively evaluate solution-diffusion properties, confirming that diffusion governs permeability in sulfur compound separation.