Linear phosphonitrilic chloride

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August undefined, 2024

NettetNevertheless, these prior processes produce significant amounts of petroleum ether insoluble linear phosphonitrilic chloride oligomers which must be separated from the desired cyclic species. U.S. Pat. No. 4,196,179 to Hudson and Dominick teaches the preparation of cyclic phosphonitrilic halide oligomer mixtures by simultaneous … Nettet15. jul. 1993 · The phosphazene catalyst, e.g., phosphonitrilic chloride, is preferably used in an amount of from about 1 to 40 ppm by weight and more preferably from about …

The preparation of linear phosphonitrilic chlorides - ScienceDirect

NettetPolymer-grade cyclic phosphonitrilic chloride trimer can be obtained from crude cyclic polyphosphonitrilic chlorides by forming a solution of the crude cyclics, water washing the solution, distilling solvent to form a hot concentrate, cooling to form a precipitate and distilling the precipitate to form polymer-grade trimer. NettetPreparation of linear phosphonitrilic chlorides 1407 facilitate sealing off. These tubes were subjected to a vacuum of at least 2.5 mm Hg and sealed off. The tubes were then … nash county real estate search

Phosphonitrilic Chlorides from Phosphorus Pentachloride

Nettet3. sep. 2010 · A complete determination of the crystal structure of tetra phosphonitrile chloride P4N4Cl8 has been made with the aid of Patterson- and Fourier analysis. The dimensions of the tetragonal ... Nettet六氯环三磷腈的聚合物——聚磷腈由于具有耐水、耐溶剂、耐油类和化学品、耐辐射、耐高温和耐低温、不燃烧和阻燃等优良性能，可以制成特种橡胶、低温弹性体、阻燃电子材料、生物医学材料等。. 在带有搅拌器的500ml三口瓶中加入氯苯150ml，三乙胺30ml，搅拌 ... Nettet列表数据仅在虚线下方。全文数据即将推出。 memberinfoid值无效

Phosphonitrilic chloride trimer 99 940-71-6 - Sigma-Aldrich

Process to synthesize a linear phosphonitrilic chloride catalyst

NettetPhosphonitrilic chloride trimer. (NPCl2)3. Synonyms: 1,3,5,2,4,6-Triazatriphosphorine-2,2,4,4,6,6-hexachloride, 1,3,5-Triaza-2,4,6-triphosphorin-2,2,4,4,6,6-hexachloride, … NettetA series of novel metal halide-stabilized linear phosphazene derivatives were synthesized. The friction-reducing and antiwear abilities of the resulting products as the lubricants for a steel-on-steel contact were comparatively investigated on an Optimol SRV oscillating friction and wear tester. The morphology of the worn steel surface was observed on a … member in filipinoNettetA two-stage process for the production of linear phosphonitrilic chloride oligomers is provided. In the first step, phosphorus trichloride (PCl3) and chlorine are reacted in a suitable liquid reaction medium. In the second step PCl3, Cl2and NH3are concurrently fed into the medium white maintaining a temperature at 100°C to 140°C. nash county register of deeds nashville nc

"NettetLysophosphatidylcholine (LPC) is an endogenous phospholipid found in micromolar concentrations in blood and ascites fluid Xu (2002). The post-receptor effects of LPC … " - Linear phosphonitrilic chloride

Linear phosphonitrilic chloride

514. Phosphonitrilic derivatives. Part I. The preparation of cyclic …

NettetThe reaction of PCl 5 and NH 4 Cl in 1,1,2,2-tetrachloroethane has been studied by 31 P n.m.r. analysis of samples withdrawn from the reaction mixture at regular intervals. … NettetLinear phosphonitrilic chloride polymers are produced from phosphonitrilic chloride oligomers by means of an improved process wherein a mixture of phosphonitrilic …

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NettetElucidation of the reaction of phosphorus pentachloride and ammonium chloride by phosphorus-31 nuclear magnetic resonance spectroscopy ... 3 PNPCl 3 + PCl 6 – in over 80% yield from PCl 5 and NH 4 Cl, and the second is the reaction of this with more NH 4 Cl to give the linear phosphonitrilic chlorides which can then undergo … Nettet14. des. 1995 · A silanol condensation-equilibration catalyst is provided in the form of a mixture of a linear phosphonitrilic chloride and an effective amount of a protic acid having a pKa≤5, such as HCl. A material capable of generating a protic acid in situ during equilibration, such as an organohalosilane, is also effective.

Nettetchloride pleionomers from linear oligomers have been disclosed in the art. For example, U. S. 3,443,913 discloses a method wherein linear (PNC12)3-15 oligomers are heated … NettetLinear phosphonitrilic chloride oligomers having a number average degree of @ polymerization from 2 to 9 are produced in high yield. a. Ui Croydon Printing Company Ltd . A process linear (PCl3) PCl3, Cl2 NH3 are concurrently fed into the medium white maintain- 100°C to of the PCl3:NH3 ...

NettetAnswer: However, if phosphonitrilic chloride high polymer is heated above a temperature of 300 to. 350" C, the material ... mith the samples either exposed to air or in vacuum. ... and 253' C in the temperature range in which polymerization occurs. Phosphonitrilic polymers are a group of linear ... NettetYe.L. GEFTER, in Organophosphorus Monomers and Polymers, 1962 The preparation of the mixture of trimeric and tetrameric phosphonitrilic chloride (588) Ammonium chloride (120–130 g) was added to a solution of phosphorus pentachloride (400 g) in tetrachloroethane (11.) and the mixture was heated in a round-bottomed flask at 135° …

NettetLinear Formula: (NPCl2)3 CAS Number: 940-71-6 Molecular Weight: 347.66 EC Number: 213-376-8 MDL number: MFCD00006474 PubChem Substance ID: 24871799 …

NettetHalophosphazene polymers such as linear phosphonitrilic chloride polymers are prepared in two stages by (i) heating a nitrogen source (e.g., NH 3; NH 4 Cl; etc.) with an excess of a phosphorus source (e.g., PCl 5; PCl 3 +Cl 2; P+Cl 2; etc.) so that hydrogen halide is evolved and halophosphazene is formed, and (ii) heating at least a portion of … memberinfo ana.orgNettet4. feb. 2011 · The cyclic phosphonitrilic chlorides (NPCl2)n(n= 3–8) break down in the mass spectrometer into a mixture of cyclic and linear products, the types of compound formed being those familiar in the ... member information principal.comNettet权利要求. What we claim is:1. In a process for preparing crystalline phosphonitrilic chloride oligomers by reacting phosphorus pentachloride with ammonium chloride in an organic solvent inert to chlorine, the improvement which comprises carrying out the reaction in the presence of 0.01% to 10% by weight, based on the weight of phosphorus ... nash county rod ncNettet3. sep. 2010 · phosphonitrilic compounds: part i. the mechanism of phosphonitrilic chloride polymerization capacitance, conductance, and electron-spin resonance … member infiniteNettetPhosphonitrilic chloride trimer (Hexachlorocyclotriphosphazene) Reagent for the synthesis of ?dandelion? (spherical) ... Linear Formula: (NPCl 2) 3. CAS Number: 940-71-6. Molecular Weight: 347.66. EC Number: 213-376-8. MDL number: MFCD00006474. PubChem Substance ID: 24871799. NACRES: member info epfoNettetINPH055 - POLY(PHOSPHONITRILIC CHLORIDE), 95% POLY(PHOSPHONITRILIC CHLORIDE), 95% Safety Data Sheet INPH055 Date of issue: 03/11/2015 Version: 1.0 Print date: 04/10/2024 EN (English US) SDS ID: INPH055 Page 1 SECTION 1: Identification 1.1. Identification Product name : POLY(PHOSPHONITRILIC … member information fileNettetLinear phosphonitrilic chloride polymers are produced from phosphonitrilic chloride oligomers by means of a two-stage process. In the first stage a mixture of phosphonitrilic chloride oligomers enriched in linear oligomer is heated with at least a stoichiometric amount (and preferably an excess) of ammonia or ammonium chloride while … nash county school board