Phosphonitrilic Compounds: Part I. The Mechanism of Phosphonitrilic Chloride Polymerization Capacitance, Conductance, and Electron-Spin Resonance Studies

Allcock, Harry R.; Best, Rupert J

doi:10.1139/v64-062

Cited by 79 publications

(35 citation statements)

References 22 publications

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“…PNCP (phenol derivative of cyclotriphosphazene) [20], CTCP (catechol derivative of cyclotriphosphazene) [21], and HNCP (2,3-dihydroxynaphthalene derivative of cyclotriphosphazene) [22] were synthesized by reacting HCCP with phenol, catechol and 2,3-dihydroxynaphthalene, respectively, using already reported methods. Novolac was synthesized from phenol, 37% formaldehyde, oxalic acid dehydrate using reported methods [23].…”

Section: Synthesis Of Cyclotriphosphazene Derivatives and Novolacmentioning

confidence: 99%

Application of cyclophosphazene derivatives as flame retardants for ABS

Shin

Ham

Kim

et al. 2010

Journal of Industrial and Engineering Chemistry

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Section: Synthesis Of Cyclotriphosphazene Derivatives and Novolacmentioning

confidence: 99%

Application of cyclophosphazene derivatives as flame retardants for ABS

Shin

Ham

Kim

et al. 2010

Journal of Industrial and Engineering Chemistry

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“…Claims have been made for both cationic 12, '3) and free radical 14) polymerization, but the answer may vary depending on the catalyst and/or the temperature employed. Claims have been made for both cationic 12, '3) and free radical 14) polymerization, but the answer may vary depending on the catalyst and/or the temperature employed.…”

Section: Nature Of Active Catalystmentioning

confidence: 99%

Solution polymerization of selected polyphosphazenes

et al. 1989

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Several alkoxy/aryloxy-substituted phosphazene polymers [P(OR)2=N],, where R = C,H,, CH2CF,, C,H lo, were prepared by the reaction of polydichlorophosphazene with their corresponding sodium salts. The polydichlorophosphazene was obtained by the solution polymerization of hexachlorocyclotriphosphazene in 1,2,4-trichlorobenzene. Sulfamic acid and ammonium sulfamate were used as catalysts. Apparently, sulfamic acid functions as a catalyst through its acid group in some decomposed form. New catalysts, p-toluenesulfonic acid and sulfobenzoic aicd, have been developed for this solution polymerization. The polymerization favors a cationic mechanism. A promoter, CaSO, . 2 H,O, was found to speed up the polymerization reaction. Effect of several parameters such as dilution, catalyst concentration, and promoter concentration on the properties of the final polymer were investigated. The polymers were characterized by differential scanning calorimetry, gel permeation chromatography, and "P solution NMR spectroscopy.

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“…)polymerize thermally to yield macro- These observations suggest that the presence of P-Cl bonds in the system is a prerequisite for chain propagation, perhaps because of the capacity of P-Cl bonds to ionize thermally (Ref. 44) or the facility with which traces of water can induce hydrolysis to P-OH units (Refs. 41 &45).…”

Section: XIVmentioning

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 Compounds: Part I. The Mechanism of Phosphonitrilic Chloride Polymerization Capacitance, Conductance, and Electron-Spin Resonance Studies

Cited by 79 publications

References 22 publications

Application of cyclophosphazene derivatives as flame retardants for ABS

Application of cyclophosphazene derivatives as flame retardants for ABS

Solution polymerization of selected polyphosphazenes

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

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