What are Polyphosphazenes give any two methods of preparation?

The poly(dichlorophosphazene) (PZ) was obtained by melt ring-opening polymerization of hexachlorocyclotriphosphazene (HCCP) under vacuum at 250°C for 3 h. After this time, the polymer was dissolved at room temperature in anhydrous THF, and it was separated by precipitation into n-heptane.

What is polymeric backbone in silicones and Phosphazenes?

The backbone is a chain of alternating silicon and oxygen atoms. Each silicone has two groups attached to it, and these can be any organic groups. The picture at the top of this page shows methyl groups attached to the silicon atoms. This polymer is called polydimethylsiloxane. It is the most common silicone.

Which of the following of the reactive precursor is commonly used to prepare poly Organophosphazenes )?

precursor poly(dichloro)phosphazene
Although not exclusive, by far the most widely used route to poly(organo)phosphazenes is via the precursor poly(dichloro)phosphazene [NPCl2]n (Fig. 3). Due to its high reactivity, this intermediate can only be isolated under anhydrous conditions and must be carefully stored or immediately reacted further.

What are Polyphosphazene used for?

Polyphosphazenes are polymers containing nitrogen as part of their backbone; they are commonly used in O-rings, pipelines, and seals in oil, fuel delivery, and storage systems.

What are Phosphonitrilic polymers?

Such phosphonitrilic halide polymers of high molecular weight are generally linear in structure and are observed to possess elastomeric properties and hence are often termed inorganic rubbers.

What are the Phosphonitrilic compounds?

Phosphonitrilic chloride tri~ner, tetramer, and polymer have been studied by X-ray and electron diffraction (23-28). The trimer exists as an almost planar six- membered ring, the tetramer as a puckered eight-membered ring, and the polymer as a linear chain which is arranged in the form of a helix.

What are the Phosphonitrilic compound and the general formula?

Phosphonitrilic chloride trimer | Cl6N3P3 – PubChem.

What are phosphazenes give examples?

They are superbases. Another class of compounds called phosphazenes are represented with the formula [X2PN]n, where X = halide, alkoxide, amide. One example is hexachlorocyclotriphosphazene. Bis(triphenylphosphine)iminium chloride is also referred to as a phosphazene.

What is Phosphonitrilic?

Answer. Answer:Phosphonitrilic halides are compounds of form X2P=N, or polymers thereof, where X is a halogen.

What are the phosphazenes and Cyclophosphazene?

Phosphazene-based ionic liquids in which quaternization occurs on the nitrogen atom or phosphorus atom of phosphazene. Ring and the exocyclic nitrogens are two possible basic sites of cyclophosphazenes.

What are phosphazenes with example?

Phosphazenes refer to classes of organophosphorus compounds featuring phosphorus(V) with a double bond between P and N. One class of phosphazenes have the formula RN=P(NR2)3. These phosphazenes are also known as iminophosphoranes and phosphine imides. They are superbases.

What are the Phosphonitrilic halides?

What is poly Phosphonitrilic chloride?

a polymer composed mainly of hexachlorocyclotriphosphazotriene. Freshly produced phosphonitrilic chloride is an amorphous substance that partially crystallizes upon extension. Density, 2.4 g/cm3 at 20°C.

What are phosphazenes inorganic chemistry?

Phosphazenes, which are cyclic or linear chain inorganic compounds formed by the bonding and repetition of phosphorus and nitrogen atoms with (P=N)n bonds, comprise an important class of inorganic compounds (Figure 1). There are many phosphazene compounds ranging from oligomers to polymers.

How Phosphonitrilic chloride is obtained?

as obtained without further purification, Phosphonitrilic chloride trimer and tetramer were obtained from The Millmaster Chemical Corporation. The trimer was used as obtained while the tetramer was distilled at 173°C and 4 mm Hg and used after recrystallization from petroleum ether (boiling range 30-60°C).