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Low-temperature thermal-shrinkage shape memory material and preparation method thereof

A technology of memory materials and low-temperature heat, which is applied in the field of shape memory functional materials and their preparation, can solve the problems of high heat shrinkage temperature, and achieve the effects of promoting crosslinking, improving irradiation efficiency, and increasing dose rate

Inactive Publication Date: 2015-05-13
QINGDAO TPI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the defect that the heat shrinkage temperature is too high or too low in the prior art, the present invention provides a low-temperature heat-shrinkable shape memory material with a heat shrinkage temperature of 60-70°C, which uses a polymer containing unsaturated carbon-carbon double bonds and Made by blending and cross-linking trans-polyisoprene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Stir and mix 90 parts of TPI, 10 parts of 1,2-PB, 3 parts of TMPTMA, 0.005 parts of ZnO, 1 part of antioxidant 1010, 1 part of antioxidant 168 and 0.5 parts of antioxidant RD at 0-50 ° C, mixing frequency 100 -1800 revolutions / min, mixing for 2-15 minutes; extruding the mixture, injection molding, molding or blow molding, and then irradiating with electron beams, the irradiation dose is 20kGy.

[0060] The performance indicators of the product are: the tensile strength before and after aging is 28MPa and 17MPa respectively; the elongation at break before and after aging is 465% and 380% respectively; the recovery rate is 100%, the heat distortion temperature is 60°C, and the gel content is 12%.

[0061] From the comparison of the performance indexes of the products of Example 1 and Comparative Example 1, it can be seen that the pure TPI irradiation crosslinking at a dose of 80kGy has a gel content of 0, poor aging performance of the product, and high heat distortion tem...

Embodiment 2

[0070] Mix 100 parts of TPI with 2 parts of TAC, 1 part of antioxidant 1010, 1 part of antioxidant MB, 1 part of antioxidant RD and 2 parts of ZnSt 2 Stir and mix at 0-50°C, the mixing frequency is 100-1800 rpm, and mix for 2-15 minutes; after the mixture is extruded, it is injection-molded, molded or blow-molded, and then irradiated with electron rays. The irradiation dose is 200kGy.

[0071] The performance index of the product is: the tensile strength before and after aging is 27MPa and 20-21MPa respectively; the elongation at break before and after aging is 470% and 400% respectively; the recovery rate is 100% and the heat distortion temperature is 70°C.

[0072] Embodiment 2':

[0073] Mix 40 parts of TPI, 60 parts of 3,4-polyisoprene with 2 parts of TAC, 1 part of antioxidant 1010, 1 part of antioxidant MB, 1 part of antioxidant RD and 2 parts of ZnSt 2 Stir and mix at 0-50°C, the mixing frequency is 100-1800 rpm, and mix for 2-15 minutes; after the mixture is extruded...

Embodiment 3

[0081] Stir and mix 60 parts of TPI, 40 parts of EVA, 4 parts of TAIC, 1 part of ZnSt, 1 part of antioxidant 4010, 1 part of antioxidant 1010, and 0.5 part of antioxidant MB at 0-50 °C, and the mixing frequency is 100-1800 rpm min, mixed for 2-15min; after the mixture is extruded, it is injection molded, molded or blow molded, and then irradiated with electron beams, and the radiation dose is 100kGy.

[0082] The performance index of the product is: the tensile strength before and after aging is 30-32MPa and 20-23MPa respectively; the elongation at break before and after aging is 280-650% and 250-600% respectively;

[0083] From the comparison of the performance indicators of the products of Comparative Example 3 and Example 3, it can be seen that the addition of the polymer containing unsaturated double bonds in the main chain works synergistically with the sensitizer and the anti-aging system, increases the interface effect between the crystalline state and the unsaturated po...

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Abstract

The invention relates to a low-temperature thermal-shrinkage shape memory material and a preparation method thereof. The low-temperature thermal-shrinkage shape memory material is prepared from a polymer containing unsaturated carbon-carbon double bonds and trans-polyisoprene by blending and crosslinking. The low-temperature thermal-shrinkage shape memory material provided by the invention has the beneficial effects that the tensile strength of the shape memory material reaches up to 18-35MPa (generally the tensile strength of a thermal shrinkage material prepared from polyisoprene is not more than 20MPa, the highest tensile strength of the material provided in CN02136921.6 is 18MPa, and the deformation restoration rate is 80-90%); the elongation at break is 280-650%; the deformation restoration rate is 100-500% (adjustable in the range according to product requirements); and the tensile strength retention rate is kept more than or equal to 75% after thermal ageing at 121 DEG C for 168 hours, the elongation at break retention rate is more than or equal to 85%, and the service life at 90 DEG C is more than 15 years.

Description

technical field [0001] The invention relates to a shape memory functional material and a preparation method thereof, in particular to a thermotropic shape memory material with a heat shrinkage temperature of 60-70°C and a preparation method thereof. Background technique [0002] Shape memory materials refer to polymers that have an initial shape, and after being deformed and fixed, the external conditions can be changed by heating or other methods to restore the original shape. [0003] The external stimuli for realizing the shape memory effect include physical factors such as heat energy, light energy, and electric energy, as well as chemical factors such as pH, phase transition reaction, and chelation reaction. Photosensitive type and chemical induction type, etc. Thermosensitive shape memory materials are widely used in the fields of medical materials, sealing materials, and temperature control materials. [0004] The memory function of thermoresponsive shape memory mat...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08L23/08C08L23/16C08L7/00C08K13/02C08J3/28C08J3/24
CPCC08L9/00C08J3/24C08J3/28C08J2309/00C08L2205/03C08K13/02C08L23/0853C08L23/16C08L7/00
Inventor 李海霞王绍荣陈占勋张利华
Owner QINGDAO TPI NEW MATERIAL