Pyrolysis of aminophosphazenes

Allcock, Harry R.; Kolich, C. H.; Kossa, Walter C.

doi:10.1021/ic50178a081

Cited by 19 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the infrared spectra of polymers [11][12][13][14] contained intense absorptions at 1400-1480 cm-1. These absorptions were also detected for the previously synthesized poly-[ (aryloxy)carbophosphazenes] and were assigned to backbone C==N vibrations.2•9 In addition, characteristic P=N skeletal absorptions were detected at 1250-1300 cm-1.10…”

Section: Synthesis and Properties Of Small-molecule Modelmentioning

confidence: 99%

“…They showed that small amounts of unreacted residual chlorine or amine hydrochloride salts were present. Residual amine hydrochloride salts were expected because [11][12][13][14] could not be purified in the presence of water. The weight-average molecular weight (Afw) of polymers 11-14 was estimated to be in the range 6.7 (br s) 151.6 (t) backbone C, *2Jc-p = 31.5 Hz; 43.0 (br s) N-CHs; 25.0 (br s) -CH2-; 11.6 (br s) -CH3…”

Section: Synthesis and Properties Of Small-molecule Modelmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Properties of Poly(aminocarbophosphazenes)

Allcock¹,

Coley²,

Morrissey³

1994

Macromolecules

View full text Add to dashboard Cite

The cyclic carbophosphazene N3P2CCI5 undergoes thermal ring-opening polymerization at 120 °C to yield poly(pentachlorocarbophosphazene), [NgPgCCleln, as a hydrolytically sensitive elastomer. Treatment of this polymer in solution with primary and secondary alkylamines yielded poly(aminocarbophosphazenes) [NgPüCtNRiRü)^,, where Ri = H, R2 = nPr or 'Pr, and Ri = Ri = Me or Et. These polymers are also sensitive to moisture. An anilino/dimethylamino mixed-substituent polymer, [NgPiCtNHPh),-(NMeü)y(Cl)z]n (x = 1.50, y = 3.34, z = 0.16), and a 2,6-diphenylphenoxy/dimethylamino mixed-substituent polymer, [N3P2C(2,6-OPh(Ph)2)z(NMe2)>]" (x = 1, y = 4), were synthesized via the same technique. A mixedsubstituent polymer with regiospecifíc backbone carbon substitution, [(NP(OCH2CF3)2)2NC(N(Ph)2)]", was also synthesized. These mixed-substituent polymers are stable to water. The macromolecules were characterized by 31P, , and 13C NMR spectroscopy, IR spectroscopy, elemental analysis, differential scanning calorimetry, thermogravimetric analysis, and gel permeation chromatography. Poly [(dimethylamino)carbophosphazene] undergoes a depolymerization reaction in solution and in the solid state to give smallmolecule cyclic analogues, including NaPgCXNMe^s. The depolymerization reaction was investigated by 31P NMR spectroscopy and thermogravimetric analysis in conjunction with mass spectrometry. Analogous smallmolecule model reactions were undertaken in which the cyclocarbophosphazene NgPaCCU was allowed to react with primary and secondary alkylamines to yield the cyclic species NaPzCtNRiRa)* The mixed-substituent cyclic species {[NP(OCH2CF3)2]2[NC(N(Ph)2)]¡and {[NP(NMe2)2] [NP(2,6-OPh(Ph)2)(NMe2)] [NC(NMe2)]} were also synthesized.

show abstract

Section: Synthesis and Properties Of Small-molecule Modelmentioning

confidence: 99%

Section: Synthesis and Properties Of Small-molecule Modelmentioning

confidence: 99%

Synthesis and Properties of Poly(aminocarbophosphazenes)

Allcock¹,

Coley²,

Morrissey³

1994

Macromolecules

View full text Add to dashboard Cite

show abstract

“…35 The alkoxy derivatives decompose at first via alkyl group migration from oxygen to nitrogen [i.e., -N=P(OR)2---N(R)P(= 0)(0R)],36 while the amino-substituted compounds undergo more complicated intermolecular condensation processes to yield ceramic-like residues. 37 The situation is quite different if both halogen and organic substituents are present within the same cyclic phosphazene ring. Generally, in these cases, thermally induced ring-opening polymerization does occur.…”

Section: CLmentioning

confidence: 99%

Poly(alkyl/arylphosphazenes) and their precursors

Neilson¹,

1988

View full text Add to dashboard Cite

“…The TGA curve of the crosslinked CPZ displays a two-step weight loss with ~50% residual mass (char) after heating at 700 °C while the DTG thermogram shows two maxima for each. Allcock et al [78,79,80] described that these reactions included decomposition of the side-chains, different thermal rearrangement reactions, and pyrolytic cross-linking. The opening of the CPZ rings was also involved in the decomposition reactions at a temperature higher than 250 °C.…”

Section: Resultsmentioning

confidence: 99%

A Green Water-Soluble Cyclophosphazene as a Flame Retardant Finish for Textiles

et al. 2019

View full text Add to dashboard Cite

Poly- and cyclophosphazenes are excellent flame retardants but currently, are not used as textile finishing agents because water-soluble and permanent washing systems are missing. Here, we demonstrate for the first time, the successful usage of a water-soluble cyclotriphosphazene derivative for textile finishing for cotton, different cotton/polyester, and cotton/polyamide blend fabrics. A durable finish was achieved using a photoinduced grafting reaction. The flame retardant properties of the various fabrics were improved with a higher limiting oxygen index, a reduced heat release rate, and an exhibition of intumescent. Furthermore, the finished textiles passed several standardized flammability tests.

show abstract

Pyrolysis of aminophosphazenes

Cited by 19 publications

References 0 publications

Synthesis and Properties of Poly(aminocarbophosphazenes)

Synthesis and Properties of Poly(aminocarbophosphazenes)

Poly(alkyl/arylphosphazenes) and their precursors

A Green Water-Soluble Cyclophosphazene as a Flame Retardant Finish for Textiles

Contact Info

Product

Resources

About