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Shape memory polyurethane based on hydrogen bond interaction and preparation method thereof

A polyurethane and memory technology, applied in the field of shape memory polyurethane based on hydrogen bond interaction and its preparation, can solve the problems of unsatisfactory production, low mechanical properties, poor memory properties, etc., to improve mechanical properties, promote interaction, The effect of good shape memory performance

Inactive Publication Date: 2020-07-03
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing shape memory polyurethane has poor shape memory performance, mainly has a linear structure, and the mechanical properties are not high, which cannot meet the needs of production.

Method used

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  • Shape memory polyurethane based on hydrogen bond interaction and preparation method thereof
  • Shape memory polyurethane based on hydrogen bond interaction and preparation method thereof
  • Shape memory polyurethane based on hydrogen bond interaction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing shape-memory polyurethane based on hydrogen bond interaction, comprising the steps of:

[0028] (1) Prepolymerization reaction: Weigh 5.0 g of PCL with a molecular weight of 2000, and dry the PCL in an oven at 80°C before use. Slowly add the dried PCL into a 250mL three-necked flask, then use a dropper to add 20-30mL of DMF solvent into the three-necked flask, and then add 3-5 drops of catalyst dibutyltin dilaurate; Stopper the bottle mouths on both sides of the three-necked flask to prevent solvent volatilization and contact with the air of the medicine. Place two-thirds of the three-necked flask in an oil bath, set the temperature of the oil bath to 70°C, and set the stirring speed Turn on the electric mixer to stir at 400r / min, wait until the temperature rises to 70°C, reset the temperature of the oil bath to 80°C, wait for the temperature of the oil bath to reach 80°C, and then slowly inject 0.8mL of HDI with a syringe In the flask; maintain ...

Embodiment 2

[0032] A method for preparing shape-memory polyurethane based on hydrogen bond interaction, comprising the steps of:

[0033] (1) Prepolymerization reaction: Weigh 7.0 g of PCL with a molecular weight of 2000, and dry the PCL in an oven at 80°C before use. Slowly add the dried PCL into a 250mL three-necked flask, then use a dropper to add 20-30mL of DMF solvent into the three-necked flask, and then add 3-5 drops of catalyst dibutyltin dilaurate; Stopper the bottle mouths on both sides of the three-necked flask to prevent solvent volatilization and contact with the air of the medicine. Place two-thirds of the three-necked flask in an oil bath, set the temperature of the oil bath to 80°C, and set the stirring speed Turn on the electric mixer to stir at 450r / min, wait until the temperature rises to 80°C, reset the temperature of the oil bath to 85°C, wait for the temperature of the oil bath to reach 85°C, and then slowly inject 1.0mL of HDI with a syringe In the flask; maintain ...

Embodiment 3

[0037] A method for preparing shape-memory polyurethane based on hydrogen bond interaction, comprising the steps of:

[0038] (1) Prepolymerization: Weigh 10.0 g of PCL with a molecular weight of 2000, and put the PCL in an oven at 80° C. to dry before use. Slowly add the dried PCL into a 250mL three-necked flask, then use a dropper to add 20-30mL of DMF solvent into the three-necked flask, and then add 3-5 drops of catalyst dibutyltin dilaurate; Stopper the bottle mouths on both sides of the three-necked flask to prevent solvent volatilization and contact with the air of the medicine. Place two-thirds of the three-necked flask in an oil bath, set the temperature of the oil bath to 85°C, and set the stirring speed Turn on the electric mixer for stirring at 500r / min, wait until the temperature rises to 85°C, reset the temperature of the oil bath to 90°C, wait until the temperature of the oil bath reaches 90°C, and then inject 1.2mL of HDI slowly using a syringe In the flask; m...

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Abstract

The invention provides shape memory polyurethane based on hydrogen bond interaction. The shape memory polyurethane has a structural formula as shown in the specification. In the structural formula, nrepresents the degree of polymerization. The prepared shape memory polyurethane based on hydrogen bond interaction adopts hydrogen bond interaction, so interaction between molecules can be promoted, and the mechanical properties of a material is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a shape-memory polyurethane based on hydrogen bond interaction and a preparation method thereof. Background technique [0002] Shape memory polymer, also known as shape memory polymer, refers to a product with an initial shape that changes its initial condition and fixes it under certain conditions, and is stimulated by external conditions (such as heat, electricity, light, chemical induction, etc.) , A polymer material that can restore its original shape. At present, polymers with shape memory properties mainly include polyurethane and polynorbornene. [0003] Shape memory polyurethane (Shapememorypolyurethane, SMPU) is a new type of functional polymer material. It is a block copolymer composed of hard segments with high glass transition temperature and soft segments with low glass transition temperature. Depending on the composition and ratio, different ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/10C08J5/18C08L75/06
CPCC08G18/10C08G18/3844C08G18/4277C08G18/6633C08J5/18C08J2375/06
Inventor 朱佳平班建峰潘露露吴铛
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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