Synthesis of poly[bis(trifluoroethoxy)phosphazene] under mild conditions using a fluoride initiator

Montague, Robert; Matyjaszewski, Krzysztof

doi:10.1021/ja00174a047

Cited by 120 publications

(33 citation statements)

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“…Polymerization of noncyclic phosphazene monomers that already bear organic side groups destined for the polymer. This approach was pioneered by WisianNeilson and Nielson [21][22][23][24], Flindt and Rose [25] and by Matyjaszewski et al [26,27]. It uses organophosphoranimines as monomers and includes the following process:…”

Section: Basic Polymer Synthesis Processesmentioning

confidence: 99%

Expanding Options in Polyphosphazene Biomedical Research

Allcock

2008

Polyphosphazenes for Biomedical Applications

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Section: Basic Polymer Synthesis Processesmentioning

confidence: 99%

Expanding Options in Polyphosphazene Biomedical Research

Allcock

2008

Polyphosphazenes for Biomedical Applications

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“…Moreover, the mechanisms of other reactions that lead to polyphosphazenes, such as the condensation-type polymerizations reported by Neilson and Wisian-Neilson (71) are also subject to catalysis (72) and this aspect will also be a fertile area for studies in the foreseeable future.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms and Catalysis in Cyclophosphazene Polymerization

Allcock

1992

ACS Symposium Series

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Ring-opening polymerization is one of the main access routes to heteroatom polymers such as polyphosphazenes or polysiloxanes.In the case of polyphosphazenes, a key reaction is the thermal ring-opening polymerization of (NPCl 2 ) 3 to poly(dichorophosphazene), (NPCl 2 ) n , which is the starting point for a wide range of macromolecular substitution reactions that yield stable and useful organophosphazene high polymers. The mechanism of polymerization of (NPCl 2 ) 3 is discussed, together with an extension of the polymerization to organophosphazene trimers and to heterocyclic monomers that contain carbon or sulfur as well as phosphorus and nitrogen in the ring.The broadest emphasis in polymer synthesis in the past 50 years has been placed on the polymerization of petrochemical monomers to organic polymers. However, the emerging field of inorganic-organic polymers is gaining increased attention because it provides an essential bridge between organic polymers and the broader areas of inorganic materials such as ceramics, metals, semiconductors, and superconductors.Prominent among these newer polymer systems is the growing field of phosphazene macromolecules (7). These polymers have the general structure shown in 1. They can be considered as being related to the older area of polysiloxanes (2) (2) and stucturally to polyethers such as polyaldehydes or polyketones (3).Polyphosphazenes are unique macromolecules in a number of ways. First, the inorganic backbone provides an unusually high degree of molecular flexibility (comparable to polysiloxanes). Second, the presence of equi-elemental amounts of phosphorus and nitrogen in these polymers provides a built-in resistance to burning. Third, the backbone is transparent from the near infrared to 220 mu in the ultraviolet. Fourth, the methods of synthesis allow an almost unprecedented range of organic, organometallic, or inorganic side groups to be linked to the skeleton. Different side groups alter the solubility, solvent resistance, crystallinity, glass transition temperature, optical absorption, electrical conductivity, biomedical compatibility, refractive index, and non-linear-optical response. Thus, the opportunities for

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“…Polymers with molecular weights ranging from Mn=20,000 to 100,000 were prepared using tetrabutylammonium fluoride and other anionic initiators which include various salts with crowned and cryptated cations. The simplified plausible reaction mechanism is presented in the scheme below 19 : …”

Section: V %Cimentioning

confidence: 99%

Catalysts and Initiators as Instruments Controlling Structure of Polymers with Inorganic Backbone.

Matyjaszewski¹

1991

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Synthesis of poly[bis(trifluoroethoxy)phosphazene] under mild conditions using a fluoride initiator

Cited by 120 publications

References 0 publications

Expanding Options in Polyphosphazene Biomedical Research

Expanding Options in Polyphosphazene Biomedical Research

Mechanisms and Catalysis in Cyclophosphazene Polymerization

Catalysts and Initiators as Instruments Controlling Structure of Polymers with Inorganic Backbone.

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