Talk:Polyphosphazene

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Problem with Step 2 in Figure

I noticed that in this figure: https://upload.wikimedia.org/wikipedia/commons/4/42/PolyphosphazeneSynthesis.png Step 2 lists various reagents and the products that they form [RONa-->N=P(OR)2; RNH2-->N=P(NHR)2; or R2NH-->N=P(OR)(NH]. My question is about the third sequence. Although it would be possible to synthesize the product shown, it would not happen according to how the reaction is written.

In other words, shouldn't it be R2NH-->N=P(NR2)2?Cafezz (talk) 07:48, 5 July 2014 (UTC)[reply]

Moving section and comments from article

Polyphosphazene polymer can provide following characteristics:

Bio-compatibility,Flexibility,High dipole moment,Broad range of Tg,Chemical inertness,Mechanical strength,solvent permeability or impermeability,Elastomeric properties and Flame-retardancy.

Applications:

1)In drug delivery:Serve as microsphere delivery vehicles for drug and vaccine and block copolymer for micell fprmation.

2)As Ion conducting material:Polyphosphazene with alkyl ether side chains and with dissolved Lithium salts are usedin Li ion conductors.They are non-flamable,have low Tg and are among few polymer thatdissolve salts like lithium triflate or Li.

3)Proton conducting fuel cell membrane:The icorporation of acidic functional units into the side groups of Polyphosphazene yields polymer that are goog proton conductors.

4)Photonic material:The ease with which differentside groups can be incorporated into polyphosphazene has opened possibility that thes polymers may find uses in communication technology.

maheboob1234@yahoo.co.in (Gulbarga University Gulbarga) Please add synthetic techniques..

For what, specifically? I am very well-versed in this area.

The above originally was added to the article. Moved them here for possible editing and return to article. ChemGardener 03:14, 14 November 2007 (UTC)[reply]

Biomaterials? Biodegradable?

The following statement was added to the article:

Moreover they can be considered as biomaterials, since they decompose into biocompatible building blocks upon hydrolysis.

Is this correct? What are the decomposition products of polychlorophosphazene and polyfluorophosphazene? Perhaps it holds only for certain classes of side radicals? Also I dispute the the definition of "biomaterial" implied by this sentence.
--Jorge Stolfi (talk) 17:06, 29 January 2010 (UTC)[reply]

I agree that biomaterial is probably the wrong term. These species hydrolyze to phosphate, ammonia, and the side chain components (ROH, R2NH, Cl- etc). The benign nature of these hydrolysis products might make the materials more practical, but I dont think that any real-world applications exist for any polyphosphazene, unfortunately. A good but slightly older ref is Mark, J. E.; Allcock, H. R.; West, R. “Inorganic Polymers” Prentice Hall, Englewood, NJ: 1992. ISBN 0-13-465881-7.--Smokefoot (talk) 19:02, 29 January 2010 (UTC)[reply]