Phosphonitrilic Fluoroelastomers—A New Class of Solvent Resistant Polymers with Exceptional Flexibility at Low Temperature

Kyker, G. S.; Antkowiak, Thomas A.

doi:10.5254/1.3557519

Cited by 55 publications

(13 citation statements)

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“…The phosphazene fluoroelastomers can be compounded and processed using conventional methods to give an excellent balance of physical properties (Table 1). This polymer was introduced commercially by Firestone Tire and Rubber Company under the trademark PNF (49). Typical end items which are undergoing evaluation or are in use are shown in Figure 6.…”

Section: Applicationsmentioning

confidence: 99%

Polyphosphazene Elastomers: Synthesis, Properties, and Applications

Singler¹,

Hagnauer²,

SICKA³

1982

ACS Symposium Series

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The synthesis of a unique class of polymers with a phosphorus nitrogen backbone is described, with an emphasis on poly(dichlorophosphazene) and poly(organophosphazene) elastomers. Poly (dichlorophosphazene) can be prepared by high temperature melt or solution polymerization techniques, with or without the use of catalysts. High performance GPC and other dilute solution techniques have been used to monitor yield and to analyze molecular weight, molecular weight distribution, and chain structure. Although poly(dichlorophosphazene) is an elastomer, it must be modified in order to obtain long term hydrolytic stability and other useful properties. From a common poly(dichlorophosphazene) intermediate, one can introduce a variety of substituents giving polyorganophosphazenes with a wide range of physical properties. Some of the useful properties of phosphazene elastomers and their technological significance will be shown. This article concludes with a brief mention of alternate synthetic methods which may lead to useful polyphosphazene elastomers.The study of open-chain polyphosphazenes has attracted increasing attention in recent years, both from the standpoint of fundamental research and technological development. These polymers have been the subject of several recent reviews (1-6). Interest has stemmed from the continuing search for polymers with improved properties for existing applications as well as for new polymers with novel properties. The polyphosphazenes are highly flexible chains of alternating phosphorusnitrogen atoms with two substituents attached to the phosphorus atom. Although the properties of the polyphosphazenes are influenced to a degree by the molecular weight and chain structure, the properties are determined largely by the size and the nature of the substituent attached to the phosphorus-

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Section: Applicationsmentioning

confidence: 99%

Polyphosphazene Elastomers: Synthesis, Properties, and Applications

Singler¹,

Hagnauer²,

SICKA³

1982

ACS Symposium Series

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“…These PNF 1 phosphazenes, marketed by Firestone [7], exhibit low glass transition temperatures (T g = À70 8C). Gleria et al [8] recently reviewed the synthesis, properties and applications of fluorinated alkoxy and aryloxy substituted phosphazenes and also those of fluorinated phosphazene block copolymers [9] obtained either by sequential polycondensation of phosphoranimines [9] or by hydrosilylation reaction [10].…”

Section: F-phosphazenesmentioning

confidence: 99%

“…Fluorinated polyphosphazenes are synthesised from the condensation of fluorinated alcohols with polydichlorophosphazenes, as follows [7]: with R: CH 2 and R F : CF 3 or (C 2 F 4 ) x H, x = 1, 2, 3.…”

Section: F-phosphazenesmentioning

confidence: 99%

Update on fluoroelastomers: from perfluoroelastomers to fluorosilicones and fluorophosphazenes

Améduri

Boutevin

2005

Journal of Fluorine Chemistry

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A survey of the synthesis, properties and applications of fluoroelastomers is reported falling into two main parts. After describing commercially available (per)fluorocarbon elastomers, fluoro-phosphazenes and silicones, recent data on hybrid fluorosilicones containing longer chains (often fluorinated) between silicon atoms are supplied. The second part deals with well-architectured fluoroelastomers. First, fluorinated thermoplastic elastomers obtained either by sequential iodine transfer polymerisation of fluoroalkenes (leading to triblock copolymers) or by a two-step procedure involving a monomer bearing peroxide that generated macroperoxides which thus produced graft copolymers. Then, multiblock copolymers were achieved either from telechelic perfluoropolyethers or from polyhydrosilylation of telechelic non-conjugated diene polyimides with fluorinated polyhybrid siloxane bearing Si-H end groups leading to exceptional materials. #

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“…Different aryloxy groups attached to the same chain can generate a similar effect (Refs. [26][27][28][29][30], and these elastomers have stimulated a growing technological interest.…”

Section: Controlled Synthesis By Substitutionmentioning

confidence: 99%

Controlled synthesis of organic-inorganic polymers that possess a backbone of phosphorus and nitrogen atoms

Allcock

1981

Makromol. Chem.

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A new class of macromolecules has been synthesized based on a skeletal structure of alternating phosphorus and nitrogen atoms (I). These are the first high polymers with an inorganic backbone to be developed on a broad scale since the discovery of the poly(organosiloxanes) in the 1940's. The preferred synthesis route makes use of highly reactive polymeric intermediates (I, X = C1 or F) used as substrates for halogen replacement by organic nucleophiles. Structural diversity is achieved either by changes in the nucleophile or by chemical modification of the side groups after they are attached to the backbone. Using these principles, a wide range of different polymers has been prepared ranging from elastomers to carrier molecules for steroids, transition metals, metalloporphyrins, or carboranes. Biodegradable and biocompatible macromolecules have also been synthesized. The critical role of small molecule model reactions is stressed, and examples are given of recently discovered organometallophosphazenes that are expected to have a profound influence on future polyphosphazene syntheses.

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Phosphonitrilic Fluoroelastomers—A New Class of Solvent Resistant Polymers with Exceptional Flexibility at Low Temperature

Cited by 55 publications

References 0 publications

Polyphosphazene Elastomers: Synthesis, Properties, and Applications

Polyphosphazene Elastomers: Synthesis, Properties, and Applications

Update on fluoroelastomers: from perfluoroelastomers to fluorosilicones and fluorophosphazenes

Controlled synthesis of organic-inorganic polymers that possess a backbone of phosphorus and nitrogen atoms

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