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Epoxy polyhedral oligomeric silsesquioxane modified phenolic resin and preparation method thereof

A technology of silsesquioxane and phenolic resin, which is applied in the field of epoxy-based cage silsesquioxane modified phenolic resin and its preparation, and can solve the problems of decreased mechanical properties, uneven dispersion, and agglomeration of polymers , to achieve the effect of widening the curing window, simple preparation method and low cost

Inactive Publication Date: 2018-11-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the amount of POSS introduced is too much, its dispersion in the polymer matrix is ​​not uniform, and significant agglomeration occurs, which makes the mechanical properties of the polymer decrease.

Method used

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  • Epoxy polyhedral oligomeric silsesquioxane modified phenolic resin and preparation method thereof
  • Epoxy polyhedral oligomeric silsesquioxane modified phenolic resin and preparation method thereof
  • Epoxy polyhedral oligomeric silsesquioxane modified phenolic resin and preparation method thereof

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preparation example Construction

[0030] The preparation method of epoxy cage type silsesquioxane modified phenolic resin of the present invention comprises the following steps:

[0031] 1) Weigh the thermoplastic phenolic resin, epoxy cage silsesquioxane and catalyst, then add solvent to the thermoplastic phenolic resin to dissolve the thermoplastic phenolic resin, then add epoxy cage silsesquioxane and catalyst , stirred to obtain a uniformly dispersed solution;

[0032] 2) Place the uniformly dispersed solution obtained in step 1) in a nitrogen atmosphere for a constant temperature reflux stirring reaction, and remove the solvent after the reaction is completed to obtain an epoxy-based cage silsesquioxane-modified phenolic resin.

[0033] Epoxy cage silsesquioxane modified phenolic resin is a light greenish brown solid.

[0034] The mass ratio of the thermoplastic phenolic resin, the epoxy cage silsesquioxane and the catalyst is 100: (10-300): (0.1-1).

[0035] The temperature during the constant temperat...

Embodiment 1

[0051] The preparation method of epoxy cage type silsesquioxane modified phenolic resin of the present invention comprises the following steps:

[0052] 1) Weigh the thermoplastic phenolic resin, epoxy cage silsesquioxane and catalyst, then add solvent to the thermoplastic phenolic resin to dissolve the thermoplastic phenolic resin, then add epoxy cage silsesquioxane and catalyst , stirred to obtain a uniformly dispersed solution;

[0053] 2) Place the uniformly dispersed solution obtained in step 1) in a nitrogen atmosphere for a constant temperature reflux stirring reaction, and remove the solvent after the reaction is completed to obtain an epoxy-based cage silsesquioxane-modified phenolic resin.

[0054]Epoxy cage silsesquioxane modified phenolic resin is a light greenish brown solid.

[0055] The mass ratio of thermoplastic phenolic resin, epoxy cage silsesquioxane and catalyst is 100:100:1.

[0056] The temperature during the constant temperature reflux stirring reacti...

Embodiment 2

[0061] The preparation method of epoxy cage type silsesquioxane modified phenolic resin of the present invention comprises the following steps:

[0062] 1) Weigh the thermoplastic phenolic resin, epoxy cage silsesquioxane and catalyst, then add solvent to the thermoplastic phenolic resin to dissolve the thermoplastic phenolic resin, then add epoxy cage silsesquioxane and catalyst , stirred to obtain a uniformly dispersed solution;

[0063] 2) Place the uniformly dispersed solution obtained in step 1) in a nitrogen atmosphere for a constant temperature reflux stirring reaction, and remove the solvent after the reaction is completed to obtain an epoxy-based cage silsesquioxane-modified phenolic resin.

[0064] Epoxy cage silsesquioxane modified phenolic resin is a light greenish brown solid.

[0065] The mass ratio of the thermoplastic phenolic resin, the epoxy cage silsesquioxane and the catalyst is 100:10:0.1.

[0066] The temperature during the constant temperature reflux s...

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Abstract

The invention discloses an epoxy polyhedral oligomeric silsesquioxane modified phenolic resin and a preparation method thereof. The preparation method comprises the following steps: 1) weighing a thermoplastic phenolic resin, epoxy polyhedral oligomeric silsesquioxane and a catalyst, putting a solvent into the thermoplastic phenolic resin to dissolve the thermoplastic phenolic resin, further adding the epoxy polyhedral oligomeric silsesquioxane and the catalyst, and stirring so as to obtain a uniformly dispersed solution; and 2) carrying out a constant-temperature backflow stirring reaction onthe uniformly dispersed solution obtained in the step 1) in a nitrogen atmosphere, and removing the solvent after the reaction is completed, thereby obtaining the epoxy polyhedral oligomeric silsesquioxane modified phenolic resin. The modified phenolic resin has excellent thermal properties and mechanical properties, and in addition is simple in preparation method.

Description

technical field [0001] The invention belongs to the technical field of ablation-resistant phenolic resin-based composite materials, and relates to an epoxy-based cage-type silsesquioxane-modified phenolic resin and a preparation method thereof. Background technique [0002] As one of the three thermosetting resins, phenolic resin has the advantages of good mechanical strength, simple synthesis process, and cheap raw materials. However, there are easily oxidized groups (such as phenolic hydroxyl groups, methylene groups, etc.) Its heat resistance is affected, and there are a large number of rigid benzene rings in the phenolic resin structure, making the cured substance brittle. With the development of aerospace technology, the performance of phenolic resin matrix materials has become increasingly stringent, and the structural modification of phenolic resin has become a research hotspot. Since the U.S. Air Force Laboratory used cage silsesquioxane (POSS) to prepare high-tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C08G77/42
CPCC08G8/28C08G77/42
Inventor 刘育红吉静茹雷子萱吴谦秋
Owner XI AN JIAOTONG UNIV
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