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Polyphosphonitrile intermediate and its preparation and use

A polyphosphazene and intermediate technology, applied in the field of polyphosphazene intermediates and its preparation and application, can solve the problems of losing the use value of reaction intermediates, and achieve the effect of enriching content

Inactive Publication Date: 2003-11-19
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this polydichlorophosphazene intermediate is extremely sensitive to air, and it will be cross-linked after being exposed to the air for a few seconds, becoming an insoluble and infusible solid, losing its use value as a reaction intermediate

Method used

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  • Polyphosphonitrile intermediate and its preparation and use

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Embodiment

[0016] Embodiment: When the coefficient x is 0.24, and the R group is hexadecyl, the synthetic route is as follows:

[0017] The synthesis method is as follows: add sodium azide and tetra-n-butylammonium iodide into a Schlenk tube containing 40 ml of tetrahydrofuran solution of polydichlorophosphazene intermediate, and react at 50° C. for 30 hours. After cooling down to room temperature, 40 ml of sodium cetyl alkoxide in tetrahydrofuran (prepared from sodium hydride and cetyl alcohol in tetrahydrofuran) was added, and the reaction was stirred at 50° C. for four days. After most of the tetrahydrofuran was removed from the resulting mixture, it was poured into 800 ml of water and allowed to stand overnight. Filter, collect the white precipitate, wash with water several times, and dry. Dissolve in tetrahydrofuran again, filter off the insoluble matter, concentrate the obtained filtrate, add methanol for re-precipitation. Stand still, filter, the obtained solid is dried and th...

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Abstract

A polyphosphazene intermediate is prepared through the reaction of polydichlorophosphazene on azosodium and sodium alkylalkoxide. Its advantages are high stability and special reaction activity.

Description

technical field [0001] The invention relates to a polyphosphazene reaction intermediate, a preparation method and application thereof. Background technique [0002] Polyphosphazene is a new type of polymer with an inorganic backbone. Its main chain is composed of alternating nitrogen and phosphorus atoms connected by single and double bonds, and each phosphorus atom is connected with two side groups. Through the research on the existing polyphosphazenes, it is shown that polyphosphazenes have extremely diverse unique properties, such as water resistance, solvent resistance, oil resistance and chemicals, and have good light and heat stability, oxidation resistance, and biocompatibility , radiation resistance, low temperature resistance, biodegradable, non-combustible and flame retardant properties, and easy to introduce organic or inorganic functional groups with different characteristics through side chains. These advantages have aroused great interest of scientists, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
Inventor 李振秦金贵
Owner WUHAN UNIV
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