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Rapid prototyping shape memory high polymer material and preparation method and application thereof

A high-molecular material and fast technology, applied in textiles and papermaking, single-component synthetic polymer rayon, fiber chemical characteristics, etc., can solve the problem of few thermoplastic shape memory polymers, achieve low price, simple preparation process, Wide selection of materials

Active Publication Date: 2013-06-19
JF POLYMERS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, generally speaking, there are still few studies on the rapid prototyping of thermoplastic shape memory polymers.

Method used

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  • Rapid prototyping shape memory high polymer material and preparation method and application thereof
  • Rapid prototyping shape memory high polymer material and preparation method and application thereof
  • Rapid prototyping shape memory high polymer material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Polyether PTMG with a molecular weight of 50,000 is used as the soft segment, and 1,6-hexamethylene diisocyanate MDI is used as the hard segment to synthesize a polyurethane prepolymer. Under the action of a catalyst, the hydroxyl-terminated POSS segment is used as a chain extender, and the reaction extrusion Shape-memory polyurethane pellets were prepared. Among them, the hard segment content is 40%. The crystallinity of the hard segment is 50% within 0.5 seconds within a temperature difference range of 300°C to 120°C. The pellets were melt spun through an extruder to obtain monofilaments of uniform diameter. Use a personal 3D printer to print a rod-shaped product with a diameter of 2mm at a printing temperature of 200-250 degrees Celsius, bend the product at 80 degrees Celsius, and cool to room temperature to fix the shape. When the temperature is raised to 80 degrees Celsius, the deformation fixation rate of the rod-shaped product is 90%, and the recovery rate is 9...

Embodiment 2

[0052] Polyester PCL with a molecular weight of 100,000 is used as the soft segment, and 1,6-hexamethylene diisocyanate MDI is used as the hard segment to synthesize a polyurethane prepolymer. Under the action of a catalyst, the hydroxyl-terminated POSS segment is used as a chain extender, and the reaction extrusion Shape-memory polyurethane pellets were prepared. Among them, the hard segment content is 20%. The crystallinity of the hard segment is 60% within 0.5 seconds within a temperature difference range of 300°C to 25°C. The pellets were melt-spun through a twin-screw extruder to obtain monofilaments of uniform diameter. Use a personal 3D printer to print a rod-shaped product with a diameter of 2mm at a printing temperature of 200-250 degrees Celsius, bend the product at 80 degrees Celsius, and cool to room temperature to fix the shape. When the temperature is raised to 80 degrees Celsius, the deformation fixation rate of the rod-shaped product is 95%, and the recovery ...

Embodiment 3

[0054] Polyether PTMG with a molecular weight of 50,000 is used as the soft segment, 1,6-hexamethylene diisocyanate MDI is used as the hard segment to synthesize polyurethane prepolymer, and the hydroxyl-terminated one, tetra-butanediol is used as the chain extender under the action of the catalyst , Reactive extrusion to prepare 4D printing shape memory polyurethane pellets. Among them, the hard segment content is 40%. In the temperature range of 300°C to 60°C, the crystallinity of the hard segment is 40% within 0.2 seconds. The pellets were melt-spun through a twin-screw extruder to obtain monofilaments of uniform diameter. Use a personal 3D printer to print a rod-shaped product with a diameter of 2mm at a printing temperature of 200-220 degrees Celsius, bend the product at 75 degrees Celsius, and cool to room temperature to fix the shape. When the temperature is raised to 75 degrees Celsius, the deformation fixation rate of the rod-shaped product is 92%, and the recovery ...

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Abstract

The invention discloses a rapid prototyping shape memory high polymer material and a preparation method and application thereof. The high polymer material comprises a physical cross-linking hard-segment structure which can be rapidly cooled and formed and a high polymer soft-segment structure which can be fixed and temporarily deformed, wherein the hard-segment structure is formed by combining diisocyanate and a crystallization type chain extender; the soft-segment structure is formed by combining polyester type or polyether type polyhydric alcohol with the crystallization type chain extender; and the molar ratio of hydroxyl in the polyhydric alcohol to diisocyanate group in the diisocyanate is 1:2-1:5. The material is functional, and the printed 3D product has the capability of self-deforming and restoring the time dimensionality; the material has good cooling forming performance, and the hard-segment part can rapidly form a physical cross-linking point in the temperature difference range of melt extrusion; the contained stationary phase and restoration phase double components are wide in material selection and low in price, a preparation process is simple, the defects that synthetic raw materials are expensive, the process is complex and the like in the prior art can be overcome, and the material is suitable for large-scale production.

Description

technical field [0001] The present invention relates to materials for rapid prototyping or 3D / 4D printing and their preparation methods and applications, in particular to a class of shape memory polymer materials that are suitable for printing and can quickly form physical crosslinking points in the melt extrusion-cooling molding process , and its preparation method and application. Background technique [0002] 3D printing is a rapid prototyping technology that has emerged in the past 30 years. 3D printing actually includes a series of different technologies, such as selective laser sintering (selective laser sintering), stereolithography (stereo lithography), fused deposition modeling (fused deposition modeling) and so on. Each technology has its own advantages and disadvantages, corresponding to very different material choices and requirements. [0003] Since 2008, personal 3D printers have emerged from the European and American markets and have developed rapidly. Unli...

Claims

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Application Information

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IPC IPC(8): D01F6/78C08G18/10C08G18/66C08G18/42C08G18/48C08G18/32B29C67/00
Inventor 罗洪盛罗小帆
Owner JF POLYMERS (SUZHOU) CO LTD
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