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A polyolefin/vinylpyridine-based shape memory elastomer and its preparation method

A vinylpyridine-based and polyvinylpyridine technology, which is applied in the field of polyolefin/vinylpyridine-based shape memory elastomers and their preparation, can solve problems such as shape memory properties that have not yet been involved, and achieves sensitive response to temperature stimulation and simple process Effect

Active Publication Date: 2017-10-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing studies on the synthesis of polyolefin ionomers have not involved their shape memory properties, especially the multi-segment shape memory

Method used

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  • A polyolefin/vinylpyridine-based shape memory elastomer and its preparation method
  • A polyolefin/vinylpyridine-based shape memory elastomer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Slowly add 0.1mol of carboxyl-terminated polybutadiene into 200ml of toluene, and fully dissolve it by mechanical stirring to obtain solution A;

[0024] (2) Slowly add 2 mol of polyvinylpyridine into 250 ml of toluene, and fully dissolve it by mechanical stirring to obtain solution B;

[0025] (3) Mix the solution A with the solution B, stir for 24 hours, use a rotary evaporator to remove most of the solvent, and then vacuum dry at 45° C. for 24 hours to remove the remaining solvent to obtain an elastomer;

[0026] (4) The elastomer was molded at 120° C. to obtain a polyolefin / vinylpyridine-based shape-memory elastomer.

[0027] The shape-memory elastomer prepared by the present invention needs to undergo a crosslinking reaction under ultraviolet light irradiation, and the shape-memory elastomer after crosslinking has better mechanical strength, elastic properties and higher recovery rate.

Embodiment 2

[0029] (1) After mixing 0.1mol of carboxy-terminated polybutadiene and 0.1mol of zinc acetate, slowly add it to 300ml of toluene, and fully dissolve it by mechanical stirring to obtain solution A;

[0030] (2) Slowly add 0.1mol of polystyrene-polyvinylpyridine copolymer into 250ml of toluene, and fully dissolve it by mechanical stirring to obtain solution B;

[0031] (3) Mix the solution A with the solution B, stir for 30 hours, use a rotary evaporator to remove most of the solvent, and then vacuum dry at 45° C. for 28 hours to remove the remaining solvent to obtain an elastomer;

[0032] (4) The elastomer was molded at 130° C. to obtain a polyolefin / vinylpyridine-based shape-memory elastomer.

[0033] like figure 1 As shown, curve 1 is the storage modulus of the shape-memory elastomer with temperature variation curve, curve 2 is the loss modulus of the shape-memory elastomer with temperature variation curve, and curve 3 is the shape-memory elastic The variation curve of the...

Embodiment 3

[0035] (1) After mixing 0.1mol of carboxy-terminated polyethylene and 0.09mol of copper acetate, slowly add it to 300ml of tetrahydrofuran, and fully dissolve it by mechanical stirring to obtain solution A;

[0036] (2) Slowly add 0.08mol of sodium acrylate-vinylpyridine copolymer into 250ml of tetrahydrofuran, and fully dissolve it by mechanical stirring to obtain solution B;

[0037] (3) Mix the solution A with the solution B, stir for 35 hours, use a rotary evaporator to remove most of the solvent, and then vacuum dry at 46° C. for 30 hours to remove the remaining solvent to obtain an elastomer;

[0038] (4) The elastomer was molded at 135° C. to obtain a polyolefin / vinylpyridine-based shape-memory elastomer.

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Abstract

The invention provides a polyolefin / vinylpyridine shape memory elastic body and a preparation method thereof. The preparation method comprises the following steps: (1) adding carboxyl-terminated polyolefin or a mixture of the carboxyl-terminated polyolefin and any one of transition metal salt, transition metal oxide and soluble alkali into toluene and / or a tetrahydrofuran solvent, and dissolving to obtain a solution A; (2) adding polyvinylpyridine or a polyvinylpyridine compound into the toluene and / or the tetrahydrofuran solvent and dissolving to obtain a solution B; (3) mixing the solution A with the solution B; after stirring for 24h to 96h, removing a large part of the solvent and drying at 45 DEG C to 50 DEG C in vacuum for 24h to 48h to remove a residual solution, so as to obtain an elastic body; (4) molding and shaping the elastic body at 120 DEG C to 190 DEG C to obtain the polyolefin / vinylpyridine shape memory elastic body. The polyolefin / vinylpyridine shape memory elastic body has the beneficial effects that the shape memory elastic body has multi-section shape memory property and elastic property.

Description

technical field [0001] The invention relates to a shape-memory elastomer, in particular to a polyolefin / vinylpyridine-based shape-memory elastomer and a preparation method thereof. Background technique [0002] Shape memory polymers refer to polymers that have an initial shape, and after being deformed and fixed under certain conditions, can be stimulated by specific external conditions to restore their original shape. Due to the designability of its "deformation-fixation-recovery" process, it has become an intelligent polymer material with wide application prospects and great development potential. It has been used in medical equipment, automobiles, intelligent anti-counterfeiting, printing, electronics, stationery , clothing and aerospace and other fields to show its great research value. [0003] At present, there have been many reports on the preparation of shape-memory polyolefin elastomers based on physical and chemical blending methods, but so far, the method of usin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L39/08C08L47/00C08L25/06C08L23/26C08L33/02C08L33/26C08L23/08C08K5/098C08K3/28C08K3/30C08K3/22
CPCC08L23/0853C08L23/26C08L25/06C08L39/08C08L47/00C08L2201/12C08L2205/03C08L2205/035C08K5/098C08L33/02C08L33/26C08K3/28C08K2003/3045
Inventor 刘彦菊谢芳R·A·韦斯冷劲松
Owner HARBIN INST OF TECH
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