Names | |
---|---|
Other names
Dichlorophosphazine polymer; Phosphonitrilechloride polymer
| |
Identifiers | |
Abbreviations | PDCP |
ChemSpider |
|
ECHA InfoCard | 100.152.298 |
Properties | |
(PNCl2)n | |
Density | 1.823 g/mL [1] |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Poly(dichlorophosphazene), also called dichlorophosphazine polymer or phosphonitrilechloride polymer, is a chemical compound with formula (PNCl2)n. It is an inorganic (hence carbon-free) chloropolymer, whose backbone is a chain of alternating phosphorus and nitrogen atoms, connected by alternating single and double covalent bonds.
The compound can be prepared by polymerization of hexachlorophosphazene ((PNCl2)3) by heating to ca. 250 °C. [2] [3] It is an "inorganic rubber" and the starting material for many other polymers with the -P=N- backbone ( polyphosphazenes), which have important commercial uses.
Poly(dichlorophosphazene) was discovered by H. N. Stokes in the 19th century, and at that time its superior properties over natural rubber were already noted. [2] [4] [5] In 1965, Harry R. Allcock at Pennsylvania State University synthesized a soluble form of the polymer, which opened the doors to the development of many derivatives. [6]
Poly(dichlorophosphazene) is not water-resistant. However, it is soluble in organic solvents such as THF and benzene, wherein it can be derivatized by replacement of the chlorine atoms with -OR or -NR2 groups (R = alkyl, aryl) to yield many other polyphosphazenes. Some of these organically modified polymers are hydrolytically stable and exhibit some attractive properties such as low glass transition temperatures.
Names | |
---|---|
Other names
Dichlorophosphazine polymer; Phosphonitrilechloride polymer
| |
Identifiers | |
Abbreviations | PDCP |
ChemSpider |
|
ECHA InfoCard | 100.152.298 |
Properties | |
(PNCl2)n | |
Density | 1.823 g/mL [1] |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Poly(dichlorophosphazene), also called dichlorophosphazine polymer or phosphonitrilechloride polymer, is a chemical compound with formula (PNCl2)n. It is an inorganic (hence carbon-free) chloropolymer, whose backbone is a chain of alternating phosphorus and nitrogen atoms, connected by alternating single and double covalent bonds.
The compound can be prepared by polymerization of hexachlorophosphazene ((PNCl2)3) by heating to ca. 250 °C. [2] [3] It is an "inorganic rubber" and the starting material for many other polymers with the -P=N- backbone ( polyphosphazenes), which have important commercial uses.
Poly(dichlorophosphazene) was discovered by H. N. Stokes in the 19th century, and at that time its superior properties over natural rubber were already noted. [2] [4] [5] In 1965, Harry R. Allcock at Pennsylvania State University synthesized a soluble form of the polymer, which opened the doors to the development of many derivatives. [6]
Poly(dichlorophosphazene) is not water-resistant. However, it is soluble in organic solvents such as THF and benzene, wherein it can be derivatized by replacement of the chlorine atoms with -OR or -NR2 groups (R = alkyl, aryl) to yield many other polyphosphazenes. Some of these organically modified polymers are hydrolytically stable and exhibit some attractive properties such as low glass transition temperatures.