Phosphorus-nitrogen-based supramolecular rare earth complex as well as preparation method and application thereof

A technology of rare earth complexes and supramolecules, applied in the field of phosphorus-nitrogen-based supramolecular rare earth complexes and their preparation, can solve the problems of material thermal stability, discounted mechanical properties, prone to violent combustion or thermal oxidative cracking, high PC Combustibility and other issues, to achieve the effect of improving fire safety, improving thermal (oxidation) stability, and good compatibility

Active Publication Date: 2021-01-01
浙大宁波理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rich hydrocarbon and benzene ring structure in its molecular chain, PC has high flammability
Once PC products are exposed to open flame or continuous high temperature, they are prone to violent combustion or thermal oxidation cracking, which will generate a large amount of heat radiation and release toxic and suffocating thick black smoke, which will not only cause the failure of the material, but also cause a fire and cause more damage. losses and casualties
Although the traditional PC flame retardant material has good flame retardant effect, the thermal stability and mechanical properties of the material are greatly reduced
[0003] As a strategic resource, rare earth metals are dubbed "industrial vitamins". Due to their variable valence, they have certain functions of

Method used

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  • Phosphorus-nitrogen-based supramolecular rare earth complex as well as preparation method and application thereof
  • Phosphorus-nitrogen-based supramolecular rare earth complex as well as preparation method and application thereof
  • Phosphorus-nitrogen-based supramolecular rare earth complex as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The preparation method of DPA in the present embodiment comprises the following steps:

[0056] (1) Weigh 0.03mol ABZP and 0.18mol DOPO and place them in a 500mL three-hole flask at the same time, then heat the reaction system to 180°C in an oil bath, and use the solid-state reaction method to react for 4 hours under mechanical stirring until the reaction system is viscous. The purity of ABZP and DOPO are both ≥97%;

[0057] (2) Cool the above reaction system to 95°C, add toluene to precipitate the product, filter the solid under reduced pressure, wash with toluene several times, purify by THF recrystallization, and dry it in a vacuum oven at 100°C until constant weight , to obtain phosphorus and nitrogen organic ligands.

[0058] Depend on figure 1 The infrared spectrum analysis shows that compared with the two raw materials of ABZP and DOPO, the P-H and C=O vibration peaks in the phosphorus and nitrogen organic ligands disappear, while other groups in DOPO and the p...

Embodiment 2

[0060] The difference from Example 1 is that in Example 2, 0.15 mol DOPO was weighed into a three-hole flask, that is, the molar ratio of ABZP to DOPO was 1:5.

[0061] The characteristic peaks shown in the infrared spectrum of the phosphorus and nitrogen-based organic ligands prepared in Example 2 are the same as those in Example 1, that is, DPA was successfully synthesized.

Embodiment 3

[0063] The difference from Example 1 is that in Example 3, 0.01mol ABZP and 0.04mol DOPO were weighed in a three-hole flask, that is, the molar ratio of ABZP and DOPO was 1:4. The reaction temperature in the reaction system is 190° C., and the reaction time is 3 hours.

[0064] The characteristic peaks shown in the infrared spectra of the phosphorus and nitrogen organic ligands prepared in Example 3 are the same as those in Example 1, that is, DPA was successfully synthesized.

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Abstract

The invention relates to a phosphorus-nitrogen-based supramolecular rare earth complex as well as a preparation method and application thereof in flame retardance, heat resistance and toughening modification of polycarbonate, and belongs to the technical field of organic synthesis, supramolecular assembly and high polymer material processing. The phosphorus-nitrogen-based supramolecular rare earthcomplex flame retardant prepared by taking cerium nitrate hydrate and phosphorus and nitrogen organic ligands (DPA) as raw materials has a stable supramolecular structure, has an adjustable two-dimensional lamellar morphology, and can play a role in flame retardance in a condensed gas phase at the same time. The phosphorus-nitrogen-based supramolecular rare earth complex is introduced into polycarbonate and can be well and uniformly dispersed in a polycarbonate matrix to modify the polycarbonate, so that the flame retardancy of the polycarbonate is enhanced, the thermal stability and toughness of the polycarbonate are improved; and the defect that in a traditional flame retardant strategy, the flame retardant property and other using properties are difficult to consider at the same time is overcome.

Description

technical field [0001] The invention belongs to the technical fields of polymer composite material processing, organic synthesis and supramolecular assembly, and specifically relates to a phosphorus-nitrogen-based supramolecular rare earth complex and its preparation method and application. Background technique [0002] Polycarbonate (PC) is a commercial engineering plastic, which has been widely used in construction, communication, lighting and daylighting due to its good dimensional stability, mechanical strength, thermal stability, high transparency, processing and ductility characteristics, etc. , electronics, vehicle engineering and many other fields. However, due to the rich hydrocarbon and benzene ring structure in its molecular chain, PC has high flammability. Once PC products are exposed to open flames or continuous high temperature, they are prone to violent combustion or thermal oxidation cracking, which will generate a large amount of heat radiation and release ...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08L69/00C08L87/00
CPCC08G83/008C08L69/00C08L2201/02C08L2201/08C08L2205/06C08L87/00Y02E60/36
Inventor 赛霆冉诗雅郭正虹方征平
Owner 浙大宁波理工学院
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