Polymer with triple shape memory effect and preparation method of polymer

A memory effect and polymer technology, applied in the field of polymers with triple shape memory effects and their preparation, can solve the problems of limiting the range of triple shape memory polymers, and achieve the effects of wide selection of raw materials, easy processing, and simple preparation methods

Inactive Publication Date: 2017-09-01
ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN200980143316.3 relates to a polymer network with triple shape memory effect and its shape design method. The proposed polymer with triple shape memory effect is a cross-linked network structure of twin crystal phase, which is composed of star polymer The first crystal phase conversion segment, the star polymer is a reactive group with at least three side arms, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A polymer with triple shape memory effect in this embodiment uses the following raw materials: polyethylene glycol diacrylate (PEGDA): average molecular weight 6000g / mol, purchased from Sigma-aldrich company; cyclohexyl methacrylate (CMA ), ethyl methacrylate (EMA): purchased from Sigma-Aldrich; benzoyl peroxide (BPO), purchased from Aladdin Reagents (Shanghai) Co., Ltd.;

[0017] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polyethylene glycol diacrylate (PEGDA), cyclohexyl methacrylate (CMA), ethyl methacrylate (EMA) ( Among them, the mass ratio of PEGDA / CMA / EMA is 3:1:1), add benzoyl peroxide (the amount added is 2.5% of the total mass of the system), dissolve it at 75°C, stir well and pour it into a sealed glass In the tank, cure at 100°C for 2 to 3 hours. The obtained polymer is a cross-linked network structure with a crystalline melting temperature (low temperature phase) and a glass transition ...

Embodiment 2

[0021] A polymer with a triple shape memory effect in this embodiment uses the following raw materials: polyethylene glycol diacrylate (PEGDA): average molecular weight 8000g / mol, purchased from Alfa Aesar; methyl acrylate (MA), methyl n-Butyl acrylate (n-BMA), methyl methacrylate (MMA): purchased from Sigma-Aldrich; azobisisobutyronitrile (AIBN), purchased from Aladdin Reagents (Shanghai) Co., Ltd.;

[0022] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polyethylene glycol diacrylate and methyl acrylate (MA), n-butyl methacrylate (n-BMA), methacrylic acid Methyl ester (MMA) (the mass ratio of PEGDA / MA / n-BMA / MMA is 5:2:2:0.5), add benzoyl peroxide (the addition amount is 2.5% of the total mass of the system), and add Dissolve at 75°C, stir evenly, pour into a sealed glass tank, and cure at 100°C for 2 to 3 hours. The obtained polymer is a cross-linked network structure with a glass transition temperature (low...

Embodiment 3

[0026] A polymer with triple shape memory effect in this embodiment uses the following raw materials: polycaprolactone diacrylate (PCLDA): average molecular weight 4000g / mol, purchased from Alfa Aesar; dimethylaminoethyl methacrylate (DMAEMA), isobornyl methacrylate (IBOMA), methacrylic acid (MAA), tricyclodecane dimethanol diacrylate (TDD): purchased from Sigma-Aldrich; dicumyl peroxide (DCP) , purchased from Aladdin Reagent (Shanghai) Co., Ltd.;

[0027] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polycaprolactone diacrylate, dimethylaminoethyl methacrylate (DMAEMA), isobornyl methacrylate (IBOMA) , methacrylic acid (MAA), tricyclodecane dimethanol diacrylate (TDD) (the mass ratio of PCLDA / DMAEMA / IBOMA / MAA / TDD is 12:5:0.5:0.5:1), adding benzene peroxide Formyl (the amount added is 2.5% of the total mass of the system), dissolved at 75°C, stirred evenly, poured into a sealed glass tank, and cured at 100°C ...

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Abstract

The invention discloses a polymer with a triple shape memory effect and a preparation method of the polymer. The polymer is of the following structures: (a) the polymer is of a crosslinking network structure containing two separated regions in a system, and the two separated phases have independent thermal transition temperatures; (b) the thermal transition temperatures of the two phases can be freely regulated and controlled, and a difference value between the thermal transition temperatures of the two phases in the same system is greater than or equal to 20 DEG C; (c) the polymer can be obtained by chemically thermal crosslinking of an acrylic acid system or a polyurethane system. The polymer prepared through the preparation method is of the crosslinking structure containing the two obviously separated regions and has the triple shape memory effect for fixing and recovering two independent temporary shapes; furthermore, the transition temperatures of the two phases can be freely regulated and controlled within an extremely large range, so that complicated diversified deformations at different temperatures can be met.

Description

technical field [0001] The invention relates to a shape-memory polymer and a preparation method thereof, in particular to a triple shape-memory effect polymer and a preparation method thereof. Background technique [0002] Shape memory polymer material is a kind of material that can be applied with certain programs to make it remember a temporary shape. When it is given appropriate external stimuli (such as: temperature, force, electromagnetic, solvent, pH, etc.), it can return to its original shape. It is a new branch point of research, development and application in the field of polymer materials. Due to its good response function, this kind of material has important application value in smart materials or smart materials, and is also called smart material. A common polymer material with shape memory is a material that responds to temperature stimuli. It is heated above the thermal transition temperature (such as glass transition temperature or crystal melting temperature...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/18C08F220/14C08F220/34C08G18/79C08G18/48C08G18/42C08G18/73C08G18/62
CPCC08F290/061C08F290/062C08G18/4018C08G18/4063C08G18/4277C08G18/4833C08G18/6229C08G18/73C08G18/792C08G2280/00C08F220/34C08F220/18C08F220/1804C08F220/1802
Inventor 张军瑞蒋国军赵正平俞卫华
Owner ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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