Preparation method for shape memory material based on thermoplastic vulcanized rubber

A thermoplastic vulcanizate and memory material technology, applied in the direction of analyzing materials, using stable tension/pressure to test material strength, strength characteristics, etc., can solve the problems of difficult product flexibility, complicated preparation process, and control, and achieve easy molding, The effect of simple preparation process and convenient preparation

Inactive Publication Date: 2019-10-08
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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  • Preparation method for shape memory material based on thermoplastic vulcanized rubber
  • Preparation method for shape memory material based on thermoplastic vulcanized rubber
  • Preparation method for shape memory material based on thermoplastic vulcanized rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of the sheet-like ethylene-acrylic acid copolymer / neoprene blended 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 95°C for 10 minutes; wherein, the mass ratio of ethylene-acrylic acid copolymer to chloroprene rubber in the thermoplastic vulcanizate is 6:4;

[0028] (2) Put the preheated thermoplastic vulcanizate under the condition of 95°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 tem...

Embodiment 2

[0034] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of the sheet-like ethylene-acrylic acid copolymer / neoprene blended 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 100°C for 10 minutes; wherein, the mass ratio of ethylene-acrylic acid copolymer to chloroprene rubber in the thermoplastic vulcanizate is 7:3;

[0035] (2) Put the preheated thermoplastic vulcanizate under the condition of 100 ℃, and apply an external force on the stretching fixture to deform the spline. After reaching 100% deformation, under the condition of maintaining the external force, stretch 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 natur...

Embodiment 3

[0040] (1) Draw two parallel scale lines in the middle of the dumbbell-shaped tensile spline of the sheet-like ethylene-acrylic acid copolymer / neoprene blended 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 95°C for 10 minutes; wherein, the mass ratio of ethylene acrylic acid copolymer to chloroprene rubber in the thermoplastic vulcanizate is 8:2;

[0041] (2) Put the preheated thermoplastic vulcanizate under the condition of 95°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 tem...

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Abstract

The invention relates to a preparation method for a shape memory material based on thermoplastic vulcanized rubber. The preparation method comprises the following steps: (1) fixing a sample strip of ethylene-acrylic acid copolymer/chloroprene rubber blended type thermoplastic vulcanized rubber on a simple stretching clamp, and then preheating the sample strip; (2) applying external force to enablethe preheated sample strip of the thermoplastic vulcanized rubber to deform, afterwards, quickly immersing the sample strip in an ice water mixture for shaping, and recording the distance between scale lines; (3) removing the external force, naturally standing for 24 hours at the room temperature, and recording the distance between the scale lines; (4) arranging the thermoplastic vulcanized rubber in the step (3) in a heating environment, and recording the distance between the scale lines; and (5) calculating the shape fixed rate (SF) and the deformation recovery rate (SR) of the thermoplastic vulcanized rubber. The shape memory material based on the thermoplastic vulcanized rubber prepared by the invention has the advantages of being low in hardness, good in flexibility, easy to shape, recyclable and low in switch temperature and is expected to be applied to sensors and self-assembly equipment.

Description

technical field [0001] The present invention relates to a preparation method of a shape memory material based on thermoplastic vulcanizate, in particular, relates to a preparation method by adjusting and controlling the preparation conditions, the rubber-to-plastic ratio of ethylene-acrylic acid copolymer / chloroprene rubber blended thermoplastic vulcanizate and the ethylene -Acrylic acid copolymer monomer content to obtain a thermoplastic vulcanizate with shape memory preparation method, which belongs to the preparation method of functional polymer materials. Background technique [0002] 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 external stimulus means such as heating. Shape memory material is a new type of intelligent material. As early as the 1960s, British scientist A.Charlesby accidentally heated stretched and deformed cross-linked polyethylene in an experiment, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18C08L11/00C08L23/08C08K13/02C08K3/22C08K5/09
CPCC08K2003/222C08K2003/2296C08L11/00C08L2201/12G01N3/18G01N2203/0017G01N2203/0075G01N2203/0226C08L23/0869C08K13/02C08K3/22C08K5/09
Inventor 刘菲菲蒋志成王兆波
Owner QINGDAO UNIV OF SCI & TECH
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