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Thermotropic polymer shape memory material

A technology of memory materials and polymers, applied in the field of preparation of thermotropic polymer shape memory materials

Inactive Publication Date: 2012-09-19
HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is essentially different from other preparations of shape memory materials, and adopts a two-step blending method for static polymerization, which has not been reported

Method used

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Examples

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Effect test

Embodiment 1

[0019] Add 1 mL of acrylonitrile, 3 mL of tributyl phosphate, and 1 mg of azobisisobutyronitrile to the test tube, and ultrasonically vibrate the test tube to make the above solutions evenly mixed. Submicron microspheres can be obtained, and then 8 mL of methyl methacrylate is added to the test tube, the constant temperature is 75° C., and the static polymerization is performed for 48 hours to obtain a memory material with good shape memory performance.

Embodiment 2

[0021] Add 1 mL of acrylonitrile, 5 mL of tributyl phosphate, and 1 mg of azobisisobutyronitrile to the test tube, and ultrasonically vibrate the test tube to make the above solution mix evenly. Submicron microspheres can be obtained, then 12 mL of ethyl methacrylate is added to the test tube, the temperature is kept at 75° C., and the static polymerization is performed for 40 hours to obtain a memory material with good shape memory performance.

Embodiment 3

[0023] Add 1 mL of acrylonitrile, 7 mL of tributyl phosphate, and 1 mg of azobisisobutyronitrile to the test tube, and ultrasonically vibrate the test tube to mix the above solutions evenly. Submicron microspheres can be obtained, then 16 mL of butyl methacrylate is added to the test tube, the temperature is 90° C., and the static polymerization is performed for 48 hours to obtain a memory material with good shape memory performance.

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Abstract

The invention provides thermotropic polymer shape memory material, aiming at overcoming the defects that an application range is narrow and functions are single because current materials have poor comprehensive performance and formability. A solvent, a monomer and an initiating agent are mixed fully, and are processed by a standing reaction under 1-100 atm (atmospheric pressure) at 10-150 degrees centigrade, wherein volume ratio of the solvent to the monomer is 1: 10-1: 1, content of the initiating agent is 0.001-10% of quality of the monomer; a polymer obtained by polymerizing the monomer is precipitated from the solvent to form a monodispersion micron-level polymer microsphere emulsion; methyl methacrylate is added into the emulsion, mixed fully, and standed at 30-130 degrees centigrade for 20-80 h after fully oscillating to obtain the thermotropic polymer-shaped memory material with good memory performance, wherein volume ratio of the emulsion to the methyl methacrylate is 1:10-5: 1. The shape memory material prepared by the method is widely applied to the fields of aviation, aerospace, medicine, engineering and so on.

Description

technical field [0001] The invention relates to a preparation method of a thermotropic polymer shape memory material. Background technique [0002] Soft, flame-retardant, pressure-resistant and corrosion-resistant polymer shape memory materials are new materials in the field of high-tech industries, and can be widely used in aerospace, automatic control systems, medicine, energy, electronics and other fields. [0003] Thermotropic shape memory polymers consist of a stationary phase that can maintain the shape of the product and a reversible phase that can undergo a reversible transition from softening to hardening with temperature changes. The stationary phase can remember the shape obtained when it was originally formed, and the reversible phase can make the product change shape when heated. The stationary phase and the reversible phase have different softening temperatures. The stationary phase is related to the polymer's cross-linked structure, partially crystalline str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/08C08F220/14C08F220/18
Inventor 王东军郑学芳贾丹丹
Owner HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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