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Poly (carbonate-ether)tetrahydric alcohol, preparation method of poly (carbonate-ether)tetrahydric alcohol and carbon dioxide based shape memory polyurethane

A carbon dioxide and carbonate technology, applied in the field of organic synthesis, can solve the problems of difficult molecular structure, high cost, long synthesis cycle, etc., and achieve the effects of adjustable shape recovery performance, reduced production cost, and excellent shape memory performance.

Active Publication Date: 2015-04-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, we must point out that the existing chemically cross-linked shape memory polyurethane uses a polyester-type macromolecular cross-linking agent or a polyether-type macromolecular cross-linking agent, which has a long synthesis cycle and high cost, and it is difficult to precisely control the molecular structure. The shape memory and shape recovery properties of shape memory polyurethane cannot be adjusted, and the above shortcomings will seriously hinder the industrialization of chemically crosslinked shape memory polyurethane

Method used

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  • Poly (carbonate-ether)tetrahydric alcohol, preparation method of poly (carbonate-ether)tetrahydric alcohol and carbon dioxide based shape memory polyurethane
  • Poly (carbonate-ether)tetrahydric alcohol, preparation method of poly (carbonate-ether)tetrahydric alcohol and carbon dioxide based shape memory polyurethane
  • Poly (carbonate-ether)tetrahydric alcohol, preparation method of poly (carbonate-ether)tetrahydric alcohol and carbon dioxide based shape memory polyurethane

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preparation example Construction

[0050] The invention provides a kind of preparation method of poly(carbonate-ether) tetrahydric alcohol, comprises the following steps:

[0051] Zn based on rare earth doping 3 [Co(CN) 6 ] 2 In the presence of a double metal cyanide catalyst, a tetravalent carboxylic acid compound is used as a chain transfer agent, and carbon dioxide and an epoxy compound are polymerized to obtain the above-mentioned poly(carbonate-ether) tetraol.

[0052] In the present invention, there is no special limitation on the carbon dioxide, and carbon dioxide well known to those skilled in the art can be used. In the present invention, the pressure of the carbon dioxide is preferably 2MPa-10MPa, more preferably 3MPa-7MPa.

[0053] In the present invention, the epoxy compound preferably includes one or more of ethylene oxide, propylene oxide, butylene oxide, cyclohexane oxide and epichlorohydrin, more preferably includes ethylene oxide One or more of alkanes, propylene oxide and epichlorohydrin. ...

Embodiment 1

[0090] Embodiment 1 (preparation of the Y-DMC doped with rare earth)

[0091] 0.78g (0.004mol) YCl3 and 11.42g (0.084mol) ZnCl 2 Dissolve in the mixed solution formed by 60mL deionized water and 30mL tert-butanol, heat the formed solution to 50°C and keep the temperature for 20min, then add 1.32g (0.004 mol) analytically pure K 3 [Co(CN) 6 ] and 20mL of deionized water, dropwise added for 45min, kept the reaction constant at 50°C, stirred for 1h to obtain a suspension; centrifuged the resulting suspension for 10min with a centrifuge (5000rpm), poured out the separated clear liquid , the sediment was washed with 60mL 50°C mixed solution of TBA and H2O for 5 times, and finally with TBA for 1 time, TBA and H 2 TBA and H in the mixed solution of O 2 The volume ratio of O was 30 / 30, 40 / 20, 50 / 10, 60 / 0 respectively, the stirring speed during the washing process was 5000 rpm, the centrifugation time was 10 min, and then the obtained sediment was vacuum dried at 50 °C for 10 h , ...

Embodiment 2

[0092] Embodiment 2 (preparation of Nd-DMC doped with rare earth)

[0093] 0.1g (0.004mol) Nd(NO 3 ) 3 and 11.42g (0.084mol) ZnCl 2 Dissolve in the mixed solution formed by 60mL deionized water and 30mL tert-butanol, heat the formed solution to 50°C and keep the temperature for 20min, then add 1.32g (0.004 mol) analytically pure K 3 [Co(CN) 6 ] and 20mL of deionized water, dropwise added for 45min, kept the reaction constant at 50°C, stirred for 1h to obtain a suspension; centrifuged the resulting suspension for 10min with a centrifuge (5000rpm), poured out the separated clear liquid , the sediment was successively washed with 60mL 50℃ TBA and H 2 The mixed solution of O was pulped and washed 5 times, and finally washed once with TBA pulp, TBA and H 2 TBA and H in the mixed solution of O 2 The volume ratio of O was 30 / 30, 40 / 20, 50 / 10, 60 / 0 respectively, the stirring speed during the washing process was 5000 rpm, the centrifugation time was 10 min, and then the obtained...

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Abstract

The invention provides poly (carbonate-ether)tetrahydric alcohol with a structure as formula I. The invention provides carbon dioxide based shape memory polyurethane which is prepared with a preparation method comprising steps as follows: poly (carbonate-ether)tetrahydric alcohol, crystallized dihydric alcohol and diisocyanate react, and the carbon dioxide based shape memory polyurethaneis obtained. The poly (carbonate-ether)tetrahydric alcohol is taken as a macromolecule crosslinking agent, can accurately control the molecular weight, has characteristics of polyether polyol and polyester polyol and can accurately control the molecular weight as well as the content of a carbonic ester unit and ether bond, and the shape memory and the shape restorability of the carbon dioxide based shape memory polyurethane prepared from the poly (carbonate-ether)tetrahydric alcohol serving as the raw material can be adjusted. Besides, the production cost of the poly (carbonate-ether)tetrahydric alcohol is reduced due to introduction of carbon dioxide, and the carbon dioxide based shape memory polyurethane has large-scale application prospect; and the poly (carbonate-ether)tetrahydric alcoholis taken as the raw material for synthesizing shape memory polyurethane, and the industrialization process of the shape memory polyurethane is promoted.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a poly(carbonate-ether) tetrahydric alcohol, a preparation method thereof and a carbon dioxide-based shape-memory polyurethane. Background technique [0002] Shape memory polyurethanes (SMPs) are a class of polymer materials that deform and fix into a temporary shape under certain conditions, and return to their original permanent shape when subjected to external stimuli (heat, light, etc.). Compared with inorganic materials, the performance of polyurethane materials is easily affected by physical and chemical factors of the external environment. Using this sensitivity, under certain conditions, shape memory polyurethane is endowed with a certain shape (initial state), and when the external conditions change, it can properly change the shape and fix it (morphing). If the external environment changes again in a specific way and regularity, the shape memory p...

Claims

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Application Information

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IPC IPC(8): C08G64/34C08G18/44C08G18/48C08G18/42
Inventor 刘顺杰秦玉升王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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