Linear phosphonitrilic chloride
NettetPhosphonitrilic chloride trimer is ground in a mortar and pestle with ammonium persulfate in a ratio of 100 g of trimer to 2 g of persulfate (mole ratio = 2.87:0.0875, Note 1) to give … NettetThe reaction between phosphorus pentachloride and phosphonitrilic chloride trimer and tetramer, under controlled conditions, was shown to yield the linear phosphonitrilic …
Linear phosphonitrilic chloride
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NettetCyclic phosphonitrilic chloride trimer suitable for polymerization to light colored, high molecular weight, linear polyphosphonitrilic chloride can be made by (1) reacting PCl.sub.5 and NH.sub.4 Cl in an inert solvent (e.g. monochlorobenzene) to form a solution of a low molecular weight linear and cyclophosphonitrilic chlorides, (2) evaporating … 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 ...
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 … 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 ...
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 … NettetLysophosphatidylcholine (LPC) is an endogenous phospholipid found in micromolar concentrations in blood and ascites fluid Xu (2002). The post-receptor effects of LPC …
NettetLinear phosphonitrilic chloride (LPNC) has been used as a catalyst to equilibrate organopolysiloxanes. Other LPNC type materials, such as ClPONPCls “PONP", have …
NettetThe preparation of cyclic and linear phosphonitrilic chlorides . L. G. Lund, N. L. Paddock, J. E. Proctor and H. T. Searle Abstract. The first page of this article is displayed as the … dジェネシス ダンジョンができて3年 小説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. dジェル 評価NettetA 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. dジェネシス 5巻 特典