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Preparation method of shape memory polymer with two-stage ultraviolet-light reversible curable lock

A memory polymer, ultraviolet light technology, applied in the field of intelligent polymer materials, can solve the problems of energy waste, unapplied shape memory polymer materials, poor shape memory performance of shape memory materials, etc. performance, improve the effect of mechanics

Inactive Publication Date: 2018-07-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And this is often the biggest obstacle that leads to the failure of shape memory polymer materials to be applied in practical engineering fields.
In practical applications, polymers often require a high degree of chemical cross-linking to endow the material with higher strength and heat resistance, but under this condition, the shape memory performance of shape memory materials is very poor
At present, some studies increase the rigid chemical structure of the material through molecular design and increase the phase transition temperature of the material, thereby improving the heat resistance and mechanical properties of the material, but the ensuing problem is that the triggering of the shape memory effect needs to be raised to a relatively high level. High temperature brings huge waste of energy

Method used

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  • Preparation method of shape memory polymer with two-stage ultraviolet-light reversible curable lock
  • Preparation method of shape memory polymer with two-stage ultraviolet-light reversible curable lock

Examples

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Embodiment 1

[0021] This embodiment provides a method for preparing a shape memory polymer with a two-stage ultraviolet light reversible curing lock. The specific steps of the method are as follows:

[0022] (1) Stir and dissolve 1.90g of diethyl iminodiacetate and 1.66g of cinnamoyl chloride in dichloromethane to obtain a uniform solution, add 2.5mL of triethylamine, react at 20°C for 6h, and then use hydrochloric acid and carbonic acid in sequence Sodium hydrogen solution, deionized water washing, drying, to obtain monomeric compounds containing cinnamon structural units;

[0023] (2) Add 1.25 g of 1,4-cyclohexanedimethanol and 27.5 μL of stannous octoate to 2.50 g of monomeric compounds containing cinnamon structural units, and react under vacuum at 120°C for 24 hours to obtain a shape containing hydroxyl groups at both ends memory polymer prepolymer;

[0024] (3) Dissolve 2.5 g of shape memory polymer prepolymer containing hydroxyl groups at both ends in chloroform, add 0.075 g of acr...

Embodiment 2

[0028] This embodiment provides a method for preparing a shape memory polymer with a two-stage ultraviolet light reversible curing lock. The specific steps of the method are as follows:

[0029] (1) Stir and dissolve 1.90g of diethyl iminodiacetate and 1.66g of cinnamoyl chloride in dichloromethane to obtain a uniform solution, add 2.5mL of triethylamine, react at 20°C for 6h, and then use hydrochloric acid and carbonic acid in sequence Sodium hydrogen solution, deionized water washing, drying, to obtain monomeric compounds containing cinnamon structural units;

[0030] (2) Add 1.25 g of 1,4-cyclohexanedimethanol and 27.5 μL of stannous octoate to 2.50 g of monomeric compounds containing cinnamon structural units, and react under vacuum at 120°C for 24 hours to obtain a shape containing hydroxyl groups at both ends memory polymer prepolymer;

[0031] (3) Dissolve 2.5 g of shape memory polymer prepolymer containing hydroxyl groups at both ends in chloroform, add 0.14 g of isoc...

Embodiment 3

[0035] This embodiment provides a method for preparing a shape memory polymer with a two-stage ultraviolet light reversible curing lock. The specific steps of the method are as follows:

[0036] (1) Stir and dissolve 1.90g of diethyl iminodiacetate and 1.66g of cinnamoyl chloride in dichloromethane to obtain a uniform solution, add 2.5mL of triethylamine, react at 20°C for 6h, and then use hydrochloric acid and carbonic acid in sequence Sodium hydrogen solution, deionized water washing, drying, to obtain monomeric compounds containing cinnamon structural units;

[0037] (2) Add 1.255 g of 1,8-octanediol and 27.5 μL of stannous octoate to 2.50 g of the above monomer compound, and react in a vacuum environment at 120°C for 24 hours to obtain a prepolymerized shape memory polymer containing hydroxyl groups at both ends. thing;

[0038](3) Dissolve 2.5 g of the above-mentioned prepolymer containing terminal hydroxyl groups in chloroform, add 0.08 g of acryloyl chloride and 0.5 mL...

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Abstract

The invention discloses a preparation method of a shape memory polymer with a two-stage ultraviolet-light reversible curable lock. The method comprises the following steps: (1) dissolving diethyl iminodiacetate and cinnamoyl chloride into dichloromethane; adding triethylamine, washing and drying to obtain a monomer compound containing a cinnamon structure unit; (2) adding dihydric alcohol and stannous octoate into the monomer compound in step (1) and reacting in a vacuum environment to obtain a shape memory polymer pre-polymer containing hydroxyls at two ends; (3) adding a small molecular monomer containing double bonds into the pre-polymer in step (2) to prepare a shape memory polymer pre-polymer with a double-bond functional group; (4) dissolving the pre-polymer in step (3) into chloroform and adding an initiator; pouring into a polytetrafluoroethylene mold and reacting; de-molding to obtain the shape memory polymer. By adopting the shape memory polymer prepared by the preparation method, the contradiction problem of mechanic and heat-resisting performance and shape memory performance of materials can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of intelligent polymer materials, and relates to a preparation method of a shape memory polymer, in particular to a preparation method of a shape memory polymer with a two-stage ultraviolet light reversible curing lock. Background technique [0002] Shape memory polymer is a kind of intelligent material, which can remember a specially set temporary shape A, and it will return from shape A to initial shape B through certain appropriate external stimulation forms, which is the so-called permanent shape. Shape memory polymer materials with different external stimuli include thermotropic, phototropic, electromagnetic, water-tropic, and so on. Currently, thermotropic shape memory polymers are the most widely used. The main principle is to achieve shape transformation by triggering phase transitions in response to temperature. In order to endow materials with excellent shape memory properties (with high fixation r...

Claims

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Application Information

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IPC IPC(8): C08F299/04
Inventor 刘宇艳罗欣成中军谢志民谭惠丰
Owner HARBIN INST OF TECH
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