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Linear polyphosphazene compound and preparation method and application thereof

A compound and a technology for polydichlorophosphazene, which are applied in the field of linear polyphosphazene compounds and their preparation, can solve problems such as unfavorable large-scale production, complex synthesis method, limited types, etc., and achieve easy storage and transportation, simple preparation method, high value-added effects

Active Publication Date: 2019-03-15
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although small molecular phosphazene compounds have been studied as polymerization catalysts for many years, there is no report of using polyphosphazene as a catalyst, and the types of common phosphazene catalysts are limited, the synthesis method is complicated, and the cost is high, which is not conducive to large-scale production. Applications in mass production

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  • Linear polyphosphazene compound and preparation method and application thereof
  • Linear polyphosphazene compound and preparation method and application thereof
  • Linear polyphosphazene compound and preparation method and application thereof

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preparation example Construction

[0093] Use of the compound of the present invention or the compound prepared by the method for preparing the compound of the present invention

[0094] In the third aspect of the present invention, the present invention proposes the use of the compound of the above-mentioned embodiment or the compound prepared by the method for preparing the compound of the above-mentioned embodiment as a catalyst in a polymerization reaction. According to the embodiments of the present invention, the compounds of the above-mentioned embodiments of the present invention or the compounds prepared by the method for preparing compounds in the above-mentioned embodiments can be used as catalysts for the preparation of polymers, such as ester copolymers, ether copolymers and polyesters, Polyether and polycarbonate copolymers, and the prepared polymer product structure is easy to control and has a variety of types. At the same time, the product does not contain heavy metal elements, has low catalyst ...

Embodiment 1

[0107] Preparation of polydichlorophosphazene

[0108]

[0109] Add the purified hexachlorocyclotriphosphazene (3.5g) and the catalyst into a narrow-necked glass tube, and use a flame spray gun to melt and burn the narrow neck of the glass tube to seal the tube under vacuum, and then put it into the preheated tube to 250°C after cooling slightly. In the oil bath, stop heating when the substance in the tube changes from molten flowing hexachlorocyclotriphosphazene to immobile translucent gel. Cut the glass tube, add dry n-hexane to remove unreacted hexachlorocyclotriphosphazene, then add dry tetrahydrofuran under the protection of nitrogen, dissolve the product linear polydichlorophosphazene, filter out the insoluble cross-linked product, and obtain poly dichlorophosphazene solution in tetrahydrofuran. m n，GPC =11500g mol -1 ,M w / M n = 1.03.

Embodiment 2

[0111] Preparation of Tris(dimethylamino)phosphazene / Dimethylamino Substituted Linear Polyphosphazene

[0112]

[0113] Under the protection of nitrogen, polydichlorophosphazene (3.5g, 30mmol containing phosphorus and nitrogen double bonds, 3.0equiv.) tetrahydrofuran solution 60mL and triethylamine (8.3mL, 60mmol, 6.0equiv.) were added to the 250mL condensate reflux tube In a three-necked flask, place it in a low-temperature bath at -30°C and keep stirring. Tris(dimethylamine)phosphazene (5.3 g, 30 mmol, 3.0 equiv.) was continuously added dropwise to the reaction system to keep the solution temperature below -20°C. After the dropwise addition, the temperature of the system was naturally raised to 20° C., placed in an oil bath, and refluxed for 12 hours. The temperature of the system was lowered to -50°C again, dimethylamine (2.7 g, 60 mmol, 6.0 equiv.) was introduced, and the temperature was raised to 20°C, and the reaction was continued for 2 hours. The insoluble matter ...

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Abstract

The invention discloses a linear polyphosphazene compound and a preparation method and application thereof. The linear polyphosphazene compound disclosed by the invention is high in stability and easyto store and transport, does not contain heavy metal elements and is environmentally friendly. Meanwhile, the linear polyphosphazene compound disclosed by the invention is simple in synthetic route,easy in raw material obtaining and low in cost, can be used for ring opening polymerization of various cyclic monomers, and is high in catalytic activity and applicable to popularization and application.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular, the invention relates to a linear polyphosphazene compound and a preparation method and use thereof. Background technique [0002] Polyphosphazene is a kind of polymer with phosphorus and nitrogen as the basic skeleton, and has both the properties of organic polymers and inorganic polymers. Linear polyphosphazenes are the most studied class of phosphazene polymers due to their special structure and side group substitution. The physical and chemical properties of linear polyphosphazenes are relatively stable, and they have good biocompatibility and biodegradability. When groups with different structures are connected to polyphosphazenes, the hydrolysis performance, mechanical properties and Surface properties vary over a wide range. In addition, linear polyphosphazene also has good flexibility, high temperature resistance, flame retardancy, etc., and can resist strong acids, stron...

Claims

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Application Information

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IPC IPC(8): C08G79/025C08G63/08C08G63/87C08G65/28C08G77/16C08G77/08C08G63/664
CPCC08G63/08C08G63/823C08G63/87C08G65/2612C08G65/2675C08G77/08C08G77/16C08G79/025
Inventor 李志波赵娜任传利付小会刘绍峰
Owner QINGDAO UNIV OF SCI & TECH
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