A preparation method of shape memory polymer material based on thermoplastic vulcanizate

A thermoplastic vulcanizate and polymer material technology, applied in the field of preparation of shape memory polymer materials based on thermoplastic vulcanizate, can solve the problems of regulation, complex preparation process, and difficult product flexibility, etc., and achieve simple preparation process, simple preparation, The effect of easy molding

Inactive Publication Date: 2020-07-21
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current shape memory polymer materials have special requirements for materials, and the preparation process is relatively complicated, so it is difficult to effectively control the flexibility of the product.

Method used

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  • A preparation method of shape memory polymer material based on thermoplastic vulcanizate
  • A preparation method of shape memory polymer material based on thermoplastic vulcanizate
  • A preparation method of shape memory polymer material based on thermoplastic vulcanizate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of ethylene-vinyl acetate copolymer / nitrile rubber thermoplastic vulcanizate, and the distance between the scale lines is L 0 =20.00mm, fix it on a simple tensile fixture, and preheat it at 75°C for 10 minutes; wherein, the mass ratio of ethylene-vinyl acetate copolymer to nitrile rubber in the thermoplastic vulcanizate is 8:2;

[0028] (2) Put the preheated thermoplastic vulcanizate under the condition of 75°C, and apply an external force on the stretching fixture to deform the spline. After reaching 100% deformation, stretch it while maintaining the external force The jig and the spline are quickly immersed in the ice-water mixture to cool down and set the temperature. At this time, the distance between the scale lines is L 1 =40.00mm;

[0029] (3) Remove the sample strip of thermoplastic vulcanizate from the simple tensile fixture, place it naturally at room temperature for 24 hour...

Embodiment 2

[0034] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of ethylene-vinyl acetate copolymer / nitrile rubber thermoplastic vulcanizate, and the distance between the scale lines is L 0 =20.00mm, fix it on a simple tensile fixture, and preheat it at 80°C for 10 minutes; wherein, the mass ratio of ethylene-vinyl acetate copolymer to nitrile rubber in the thermoplastic vulcanizate is 7:3;

[0035] (2) Put the preheated thermoplastic vulcanizate under the condition of 80 ℃, apply an external force on the stretching fixture to deform the spline, and after reaching 100% deformation, stretch it under the condition of maintaining the external force The jig and the spline are quickly immersed in the ice-water mixture to cool down and set the temperature. At this time, the distance between the scale lines is L 1 =40.00mm;

[0036] (3) Remove the sample strip of thermoplastic vulcanizate from the simple tensile fixture, place it naturally at room temperat...

Embodiment 3

[0040] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of ethylene-vinyl acetate copolymer / nitrile rubber thermoplastic vulcanizate, and the distance between the scale lines is L 0 =20.00mm, fix it on a simple tensile fixture, and preheat it at 75°C for 10 minutes; wherein, the mass ratio of ethylene-vinyl acetate copolymer to nitrile rubber in the thermoplastic vulcanizate is 9:1;

[0041] (2) Put the preheated thermoplastic vulcanizate under the condition of 75°C, and apply an external force on the stretching fixture to deform the spline. After reaching 100% deformation, stretch it while maintaining the external force The jig and the spline are quickly immersed in the ice-water mixture to cool down and set the temperature. At this time, the distance between the scale lines is L 1 =40.00mm;

[0042] (3) Remove the sample strip of thermoplastic vulcanizate from the simple tensile fixture, place it naturally at room temperature for 24 hour...

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Abstract

A preparation method of a shape memory high polymer material based on thermoplastic vulcanizate comprises steps as follows: (1) a sample of ethylene-vinyl acetate copolymer / nitrile rubber thermoplastic vulcanizate is fixed on a simple tensile fixture and preheated; (2) external force is applied, so that the preheated thermoplastic vulcanizate sample deforms and then is soaked in an ice-water mixture to be set, and the distance between scale marks is recorded; (3) external force is removed, the sample is naturally placed at the room temperature for 24 hr, and the distance between scale marks isrecorded; (4) the thermoplastic vulcanizate sample in (3) is put in a heating temperature, and the distance between scale marks is recorded; (5) the SF (shape fixed rate) and the SR (shape recovery rate) of the thermoplastic vulcanizate are calculated. The prepared shape memory high polymer material based on thermoplastic vulcanizate has the advantages of being low in hardness, good in flexibility, easy to form, recyclable and low in switch temperature and is expected to be applied to sensors and self-assembly equipment.

Description

technical field [0001] The invention relates to a method for measuring the shape fixation rate and deformation recovery rate of a shape memory polymer material based on thermoplastic vulcanizate, in particular to a method for thermoplastic vulcanization of ethylene-vinyl acetate copolymer / nitrile rubber by adjusting and controlling preparation conditions The preparation method of thermoplastic vulcanizate with shape memory function obtained by adjusting the rubber-to-plastic ratio of the rubber and the content of the second monomer in ethylene-vinyl acetate copolymer and nitrile rubber belongs to the preparation method of functional polymer materials. Background technique [0002] Shape memory material is a new type of smart material. Shape memory refers to the phenomenon that a product with an initial shape can be restored to its original shape after being deformed and fixed by means of external stimuli such as heating. As early as the 1960s, British scientist A.Charlesby ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L9/02
CPCC08L23/0853C08L2201/12C08L9/02
Inventor 王兆波王立斌蒋志成
Owner QINGDAO UNIV OF SCI & TECH
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