1184-10-7Relevant academic research and scientific papers
Synthesis and flame retardant properties of low density polyethylene/ethylene-vinyl acetate/polyphosphazene derivative composites
Zhao, Zhengping,Zhou, Zeping,Yu, Fengying,Ji, Jianbing
, p. 919 - 924 (2015)
Polyphosphazene derivative, hexaphenoxylcyclotriphosphazene, was synthesized via hexachlorocyclotriphosphazene and phenol by nucleophilic substitution as a kind of intumescent fire retardant filling with ethylene-vinyl acetate copolymer, Mg(OH)2 and Al(OH)3 to modified low density polyethylene to study the effects of content and different polyphosphazene structure on the flame retardant properties. The LOI value increased from 17.0 to 22.2 with the hexaphenoxylcyclotriphosphazene individually. But, when composited with Mg(OH)2, Al(OH)3, the blends have better flame retardancy. The LOI value was 31.7 at the filling amount of 5 wt. % hexaphenoxylcyclotriphosphazene (M-3) and changing characteristics from V-2 (flammable material) to V-0 (flame retardant material). The maximum specific optical density decreased from 370.65 to 91.72 and the maximum flame retardant synergist index reached 3.4. SEM morphology of smoke density residue shows that hexaphenoxylcyclotriphosphazene promotes the increase of residual volume and compactness of surface layer of the solid residues.
Multiporphyrin arrays on cyclotriphosphazene scaffolds
Kaur, Tejinder,Rajeswararao, Malakalapalli,Ravikanth, Mangalampalli
, p. 11051 - 11059 (2014)
We report the synthesis of first examples of hexaporphyrin and dodecaporphyrin assemblies on cyclotriphosphazene scaffold by adopting two different approaches based on Ru-pyridyl "N" coordination in decent yields. The multiporphyrin assemblies were confir
Photophysical studies on multichromophoric cyclotriphosphazenes. Trinuclear excimer formation in hexakis(2-naphthyloxy)cyclotriphosphazene
Chattopadhyay, Nitin,Haldar, Basudeb,Mallick, Arabinda,Sengupta, Saumitra
, p. 3089 - 3092 (2005)
Hexakis(2-naphthyloxy)cyclotriphosphazene showed an interesting emission behavior between its monomer and excimer forms, the latter nearly completely dominating in water. Encapsulation studies with β-cyclodextrin in water partially revived the monomer emission.
Fluorescence properties of fluorenylidene bridged cyclotriphosphazenes bearing aryloxy groups
?ift?i, G?nül Yenilmez,?enkuytu, Elif,Incir, Elif Saadet,Durmu?, Mahmut,Yuksel, Fatma
, p. 741 - 749 (2015)
The synthesis and characterization of the first series of aryloxy full-substituted fluorenylidene open chain and bridged cyclotriphosphazene derivatives (13-18) are reported in this study. The synthetic route utilized includes the reaction of penta-substituted cyclotriphosphazenes (5, 7, 9) with 4,4′-(9-fluorenylidene)diphenol (FDP) (11) and 4,4′-(9-fluorenylidene)dianiline (FDA) (12) to give bridged compounds (13, 15-17) and open chain compounds (14 and 18). The structural investigations of the compounds were verified by elemental analyses, mass spectrometry, UV-Vis, FT-IR, 1H and 31P NMR techniques, and X-ray crystallography (for 13 and 18). The fluorescence behavior of the studied cyclotriphosphazene derivatives were also examined in THF solution. Compound 16 showed a high emission among the studied compounds to investigate its metal sensing properties. This compound showed high selectivity for copper (Cu2+) and iron (Fe2+/Fe3+) ions in solution.
Synthesis method of hexaphenoxy cyclotriphosphazene flame retardant
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Paragraph 0024-0039, (2021/06/26)
The invention discloses a synthesis method of a hexaphenoxy cyclotriphosphazene flame retardant. The method comprises: preparing an intermediate phenoxide solution, and carrying out nucleophilic substitution on the intermediate phenoxide solution and a hexachlorocyclotriphosphazene solution; after the reaction is finished, cooling, carrying out liquid separation, filtering and separating metal halide, and recovering a solvent under reduced pressure; and precipitating, washing and refining concentrate by an alcohol/water mixed solvent, and carrying out other post-treatment processes, wherein a white powdery hexaphenoxy cyclotriphosphazene flame retardant product prepared by adopting a step-by-step one-pot boiling process is high in heat resistance, and the yield is greater than 90%. The synthesis method is energy-saving, environment-friendly, simple, convenient and safe to operate, short in reaction time, low in cost, good in product quality and suitable for large-scale production.
Phosphazene functionalized silsesquioxane-based porous polymers for absorbing I2, CO2 and dyes
Wang, Yiqi,Soldatov, Mikhail,Wang, Qingzheng,Liu, Hongzhi
, (2021/03/06)
Porous polymers have been widely used as adsorbents to cope with environmental issues. Two parallel series of hybrid silsesquioxane-based phosphazene functionalized porous polymers (PCS-OP-1, 2, 3 and PCS-CP-1, 2, 3) have been prepared by varying the molar ratio of hexaphenoxycyclotriphosphazene (OP) or hexaphenylcyclotriphosphazene (CP) with octavinylsilsesquioxane (OVS) in the Friedel-Crafts reaction, respectively. PCS-OP-3 and PCS-CP-3 with hierarchical micropore/mesopore coexisting structures and high surface areas are chosen to absorb I2 vapor, dyes and CO2. The adsorption capacity of PCS-OP-3 is higher than PCS-CP-3, which is 1.51 g g?1 for iodine vapor, 731 mg g?1 for Congo red (CR), 151 mg g?1 for Methylene Blue (MB) and 1.74 mmol g?1 for CO2. This study provides a feasible method to prepare and tune phosphazene functionalized silsesquioxane-based porous polymers.
Method for synthesizing phenoxycycloposphazene
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Paragraph 0022-0034, (2020/02/20)
The invention discloses a method for synthesizing phenoxycycloposphazene. The method comprises the following steps: dissolving hexachlorocyclotriphosphazene and a phase transfer catalyst into an organic solvent so as to obtain an organic-phase raw material; by taking a sodium phenate aqueous solution as a water-phase raw material, simultaneously feeding the organic-phase raw material and the water-phase raw material into a multi-stage centrifugal extractor with a heating function, performing a multi-stage countercurrent reaction, dissolving generated phenoxycycloposphazene into an organic solvent to form an organic-phase reaction liquid, and dissolving generated sodium chloride into water to form a water-phase reaction liquid; and distilling the organic-phase reaction liquid supporting thephenoxycycloposphazene to remove the solvent, washing hot residues obtained after the solvent is removed by using a low-molecule alcohol, and performing solid-liquid separation after washing, so as to obtain the phenoxycycloposphazene. The method is possible in continuous production, simple in process and easy to control, and the product is high in yield and purity.
Tris(o-phenylenedioxy)cyclotriphosphazene as a Promoter for the Formation of Amide Bonds between Aromatic Acids and Amines
Movahed, Farzaneh Soleymani,Sawant, Dinesh N.,Bagal, Dattatraya B.,Saito, Susumu
, p. 3253 - 3262 (2020/11/02)
The atom-efficient formation of amide bonds has emerged as a top-priority research field in organic synthesis, as amide bonds constitute the backbones of proteins and represent an important structural motif in drug molecules. Currently, the increasing demand for novel discoveries in this field has focused substantial attention on this challenging subject. Herein, the degradable 1,3,5-triazo-2,4,6-triphosphorine (TAP) motif is presented as a new condensation system for the dehydrative formation of amide bonds between diverse combinations of aromatic carboxylic acids and amines. The underlying reaction mechanism was investigated, and potential catalyst intermediates were characterized using 31 P NMR spectroscopy and ESI mass spectrometry.
METHOD FOR PRODUCING CYCLIC ARYLOXYPHOSPHAZENE
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Paragraph 0037-0042; 0045-0047, (2020/02/19)
PROBLEM TO BE SOLVED: To provide a method for producing a cyclic aryloxyphosphazene in a short time and in high yield under a mild condition by a simple operation. SOLUTION: Provided is a method for producing a cyclic aryloxyphosphazene represented by Formula (2), comprising reacting hexachlorocyclotriphosphazene with an aryl alcohol in a nitrile only or an organic solvent mixed with 40 vol.% or more and less than 100 vol.% of a nitrile in the presence of a pellet-like material of al least one hydroxide selected from the group consisting of potassium hydroxide and sodium hydroxide. [Ar is a substituted or unsubstituted aryl group.] SELECTED DRAWING: None COPYRIGHT: (C)2020,JPO&INPIT
Cyclotriphosphazene fire retardant with beta-crystal inducing nucleation effect and synthetic method thereof
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Paragraph 0017, (2019/06/07)
The invention relates to a cyclotriphosphazene fire retardant with a beta-crystal inducing nucleation effect and a synthetic method thereof. The synthetic method of the cyclotriphosphazene fire retardant with the beta-crystal inducing nucleation effect is characterized by comprising the steps of adding hexachlorocyclotriphosphazene to a container filled with a solvent; uniformly stirring the hexachlorocyclotriphosphazene and the solvent to obtain a mixed solution A; uniformly mixing a reactant containing a rigid group and an acid-binding agent to obtain a mixed solution B; dripping the mixed solution B into the mixed solution A; enabling the mixed solution B to react with the mixed solution A for 6-10 hours at 80-120 degrees centigrade; and separating a reactant to obtain the cyclotriphosphazene fire retardant with the beta-crystal inducing nucleation effect. The cyclotriphosphazene fire retardant with the beta-crystal inducing nucleation effect, provided by the invention, has the advantages that the heat resistance of the cyclotriphosphazene is utilized, the charring amount is larger, the heat stability is higher, polypropylene can be induced to generate a certain quantity of betacrystals, and therefore, an aggregation state structure of a polypropylene composite material is changed to realize a purpose of jointly improving the flame retardant property and the mechanical property.
