Shape memory polymer alloy for fused deposition based 3D printing and preparation method of shape memory polymer alloy

A memory polymer, 3D printing technology, applied in additive processing and other directions, can solve the problems of lack of functionality such as shape memory, lack of reversible phase and stationary phase, single type of components, etc., to alleviate uneven volume shrinkage, improve Mechanical properties, the effect of reducing water absorption

Active Publication Date: 2019-08-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the Chinese invention patent applications CN103739954A, CN104086891A and CN106433108A and other polyolefin or nylon printing consumables have better overall performance, but due to the relatively simple component types of their raw materials, they only have inorganic fillers for improving printing performance and processing performance. Tougheners, additives and other components, but lack the reversible phase and stationary phase that are necessary for semi-crystalline polymer shape memory systems, and thus lack functionality such as shape memory, making its application subject to obvious functional limitations

Method used

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  • Shape memory polymer alloy for fused deposition based 3D printing and preparation method of shape memory polymer alloy
  • Shape memory polymer alloy for fused deposition based 3D printing and preparation method of shape memory polymer alloy
  • Shape memory polymer alloy for fused deposition based 3D printing and preparation method of shape memory polymer alloy

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Embodiment 1

[0041] The preparation method of the shape memory polymer alloy based on fused deposition 3D printing comprises the following steps: according to the weight percentage of raw materials, 44wt% polypropylene plastic, 30wt% nylon 66, 22wt% POE-g-MAH, 1wt% Nano-silica was dried at 60°C for 5 hours, and then the above materials were mixed with 0.2wt% dicumyl peroxide DCP and 2.8wt% turpentine in a high-speed mixer at a mixing temperature of 50°C and a mixing time of 20 minutes; the mixed raw materials are put into a twin-screw extruder to melt and extrude and pelletize, wherein the extrusion temperature is 250°C, and the screw speed is 80r / min; after drying the obtained pellets at 60°C for 6 hours, Through melt extrusion in a twin-screw extruder, a polymer alloy wire rod with a diameter of 1.75±0.1 mm that can be used for fused deposition 3D printing is obtained, wherein the extrusion temperature is 255° C., and the screw speed is 40 r / min.

[0042] Send the prepared wire into the ...

Embodiment 2

[0052] 35wt% high-density polyethylene, 30wt% nylon 6 and 32wt% EPDM-g-MAH, 2.5wt% nano calcium carbonate were dried at 80°C for 4 hours, and then the above materials were mixed with 0.5wt% diisoperoxide Propylbenzene and DCP are put together in a high-speed mixer for mixing, the mixing temperature is 60°C, and the mixing time is 15 minutes; the mixed raw materials are put into a twin-screw extruder to melt and extrude and pelletize, and the extrusion temperature is 235°C. The screw speed is 70r / min; the obtained pellets are dried at 80°C for 5 hours, and then melted and extruded through a twin-screw extruder to obtain a polymer alloy with a diameter of 1.75±0.1mm that can be used for fused deposition 3D printing Wire rod, wherein the extrusion temperature is 235° C., and the screw speed is 50 r / min.

[0053] The test sample was prepared by fused deposition 3D printing, where the printing arrangement was ±45°, the printing filling rate was 100%, the nozzle temperature of the p...

Embodiment 3

[0055] 38wt% polypropylene, 30wt% nylon 1010 and 28wt% SEBS-g-MAH, 3wt% nano silicon dioxide were dried at 70°C for 5 hours, and then the above materials were mixed with 0.3wt% dicumyl peroxide DCP and 0.7wt% styrene are put together in a high-speed mixer for mixing, the mixing temperature is 40°C, and the mixing time is 30 minutes; the mixed raw materials are put into a twin-screw extruder to melt and extrude and granulate, wherein the extrusion temperature The temperature is 230°C, and the screw speed is 60r / min; after drying the obtained pellets at 80°C for 4 hours, they are melted and extruded through a twin-screw extruder to obtain fused deposition 3D printing with a diameter of 1.75±0.1mm A polymer alloy wire rod, wherein the extrusion temperature is 210° C., and the screw speed is 60 r / min. The test sample was prepared by fused deposition 3D printing, where the printing arrangement was ±45°, the printing filling rate was 80%, the nozzle temperature of the printing equip...

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Abstract

The invention discloses a shape memory polymer alloy for fused deposition based 3D printing and a preparation method of the shape memory polymer alloy. The polymer alloy is prepared from raw materialsin percentage by weight as follows: 30%-50% of polyolefin plastics, 10%-40% of nylon resin, 20%-40% of thermoplastic elastomer graft, 0.1%-1% of a peroxide crosslinking agent, 0-5% of an assistant crosslinking agent and 1%-5% of a nanofiller. The raw materials mixed by a high-speed mixer are subjected to melt extrusion molding, and the polymer alloy suitable for fused deposition based 3D printingcan be obtained. The prepared polymer alloy has excellent 3D printing performance, so that a printed product has the characteristics of being low in warping degree, high in dimensional stability, better in mechanical property and heat resistance and the like and has a smooth surface without defects and an excellent thermally induced shape memory function, and the printed product are higher in shape fixed rate and shape recovery rate, and the application requirement of a shape memory product can be met.

Description

technical field [0001] The invention relates to a 3D printing polymer consumable, in particular to a shape memory polymer alloy based on fused deposition 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology is a rapid prototyping technology developed in the 1980s. According to its working principle, it can be divided into selective laser sintering technology, stereolithography technology, and fused deposition modeling technology. Among them, fused deposition modeling has become one of the most widely used 3D printing technologies due to its simple principle, convenient operation, and low cost. It can be widely used in medical, automotive, military, aerospace, electronic products, education and culture. , art design and other fields. [0003] With the development of 3D printing technology becoming more and more mature, people's needs are far from being satisfied with "3D printing". The concept of "4D printing" proposed in 2013 ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L77/06C08L23/06C08L77/02C08L51/04C08L51/00C08K3/26C08L23/08C08L51/06C08K3/36C08K5/14B33Y70/00B33Y80/00
CPCB33Y70/00B33Y80/00C08K2003/265C08K2201/011C08L23/06C08L23/0815C08L23/12C08L2207/062C08L77/06C08L51/06C08K3/36C08K5/14C08L77/02C08L51/04C08K3/26C08L51/006
Inventor 何慧彭晓冬贾雲超刘灏黄柏耿一
Owner SOUTH CHINA UNIV OF TECH
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