Photoactivity benzoxazine elastomer and preparation method thereof

A benzoxazine and elastomer technology, applied in the field of photoactive benzoxazine elastomer and its preparation, can solve problems such as poor heat resistance, achieve good flexibility and applicability, high resilience, and simple curing process Effect

Inactive Publication Date: 2019-08-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An object of the present invention is to provide a photoactive compound containing an azo structure for the existing thermoplastic elastomer materials, which have poor heat resistance, strong elongation, weather resistance, oil resistance, wear resistance and other defects that need to be improved. Benzoxazine Elastomer

Method used

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  • Photoactivity benzoxazine elastomer and preparation method thereof
  • Photoactivity benzoxazine elastomer and preparation method thereof
  • Photoactivity benzoxazine elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of photoactive benzoxazine elastomer, the steps are as follows:

[0036] (1) After adding 120 parts by weight of paraformaldehyde and 396 parts by weight of 4-hydroxyazobenzene into the reactor, add 1500 parts by weight of toluene, mechanically stir at 500 rpm for 20 minutes at 25°C, and pour into the system Slowly add 230 parts by weight of polyetheramine D230 dropwise; (2) Reflux the system for 8 hours at 125°C and 500 rpm with mechanical stirring; After 3 times, the organic phase was separated, the toluene was removed by rotary evaporation, and the product was dried to obtain a benzoxazine monomer containing an azo structure; (3) the benzoxazine monomer containing an azo structure was solidified at 180°C After reacting for 2 hours, curing and reacting at 200° C. for 2 hours to prepare an elastomer containing an azo structure x benzoxazine. The reaction process is as follows:

[0037]

[0038] figure 1It is the NMR characterization diagram o...

Embodiment 2

[0041] A preparation method of photoactive benzoxazine elastomer, the steps are as follows:

[0042] (1) After adding 120 parts by weight of paraformaldehyde and 396 parts by weight of 4-hydroxyazobenzene into the reactor, add 1500 parts by weight of dioxane, and mechanically stir at 500 rpm for 15 minutes at 25°C. Slowly add 400 parts by weight of polyetheramine D400 to the system dropwise; (2) Reflux the system at 125°C and 500 rpm with mechanical stirring for 8 hours. After the reaction is complete, cool the system to room temperature, wash with alkali, After washing with water for 3 times, the organic phase was separated, the dioxane was removed by rotary evaporation, and the product was dried to obtain a benzoxazine monomer containing an azo structure. The azo-structure-containing benzoxazine monomer was cured at 180° C. for 2 hours, and then cured at 200° C. for 2 hours to prepare an azo-structure-containing benzoxazine elastomer. The reaction process is as follows:

...

Embodiment 3

[0048] A preparation method of photoactive benzoxazine elastomer, the steps are as follows:

[0049] (1) After adding 120 parts by weight of paraformaldehyde and 396 parts by weight of 4-hydroxyazobenzene into the reaction kettle, add 1500 parts by weight of ethyl acetate, and mechanically stir at 500 rpm for 10 minutes at 25°C to feed the system Slowly add 2000 parts by weight of polyetheramine D2000 dropwise; (2) Reflux the system at 125°C and 500 rpm with mechanical stirring for 8 hours. After the reaction is completed, cool the system to room temperature and wash with alkali and water. After each 3 times, the organic phase was separated, the ethyl acetate was removed by rotary evaporation, and after the product was dried, a benzoxazine monomer containing an azo structure was obtained; (3) the benzoxazine monomer containing an azo structure was After curing at 180°C for 2 hours, and then curing at 200°C for 2 hours, a benzoxazine elastomer containing an azo structure was pr...

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Abstract

The invention discloses a photoactivity benzoxazine elastomer. The elastomer is prepared from a benzoxazine monomer containing the azo structure and flexible chain segments through a ring opening polymerization reaction; the benzoxazine monomer is prepared from paraformaldehyde, phenol containing the azo structure and primary amine containing the flexible chain segments. A preparation method of the elastomer comprises the steps that (1) paraformaldehyde, the phenol containing the azo structure and a dispersion medium are added into a reaction kettle and stirred for 10-30 minutes at 25-60 DEG C, and then the primary amine containing the flexible chain segments is added slowly; (2) the system is heated to 100-125 DEG C, a reflux reaction is conducted for 4-10 hours, and through separation, the benzoxazine monomer is obtained; (3) firstly, the benzoxazine monomer is subjected to a reaction for 1-5 hours at 160-200 DEG C and then subjected to a reaction for 2-4 hours at 200-260 DEG C, andthe photoactivity benzoxazine elastomer is obtained. The photoactivity benzoxazine elastomer has photoactivity of an azoic compound and flexibility brought by a flexible group compound, keeps the application characteristic of polybenzoxazine and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of organic polymer materials, and in particular relates to a photoactive benzoxazine elastomer and a preparation method thereof. Background technique [0002] Photoresponsive polymer materials usually contain molecules or functional groups (such as azophenyl groups) that can absorb light energy. Under the action of light, certain chemical or physical reactions will occur, resulting in a series of structural and morphological changes, thus showing specific function. Photodeformation is a way to convert light energy into mechanical energy by inducing shape changes in macroscopic objects. Photoactive materials can produce reversible discoloration effects under the irradiation of ultraviolet light and visible light, and their special optical properties have broad application prospects in optoelectronic fields such as optical information storage, anti-counterfeiting, and optical switches. Organic small molecule...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G14/06
CPCC08G14/06
Inventor 李云涛何思里赵春霞李姝靓李辉向东刘敬懿
Owner SOUTHWEST PETROLEUM UNIV
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