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Preparation method and application of castor oil-based polyamide capable of being cross-linked by ultraviolet light

An oil-based polyamide and castor oil-based technology, which is applied in the field of polymers, can solve the problems of thermoplastic elastomers such as unrecoverable properties and complex methods, and achieve the effects of expanding the scope of use, simple preparation methods, and improved performance

Active Publication Date: 2022-05-13
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the elastic body in the prior art needs to be stretched multiple times, the method is complicated, and the performance of the thermoplastic elastomer cannot be recovered after stretching, so it is necessary to carry out reasonable molecular structure design and aggregation structure. Fine regulation

Method used

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  • Preparation method and application of castor oil-based polyamide capable of being cross-linked by ultraviolet light
  • Preparation method and application of castor oil-based polyamide capable of being cross-linked by ultraviolet light
  • Preparation method and application of castor oil-based polyamide capable of being cross-linked by ultraviolet light

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Experimental program
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Effect test

Embodiment 1

[0055] The preparation of castor oil-based functional polyamide comprises the following steps:

[0056] 13g parts by weight functional polyamide monomer 1, 14g functional polyamide monomer 2, 12g oxadithiol and 0.1g azobisisobutyronitrile catalyst were dissolved in 25mL tetrahydrofuran solvent; Minutes, placed in a 65°C oil bath for 24 hours of reaction; finally, the functional polyamide product was obtained by methanol precipitation.

[0057] The structural formula of the castor oil-based functional polyamide synthesized in the present embodiment is as follows:

[0058]

[0059] , where R 2 for -OH or The structural formula of functional polyamide monomer 1 in the present embodiment is: It is the functional polyamide monomer in Example 1-1 disclosed by the patent publication No. CN107501116 A.

[0060] The structural formula of functional polyamide monomer 2 in the present embodiment is: It is the functional polyamide monomer in Example 3 disclosed by the patent pu...

Embodiment 2

[0062] The preparation method of the castor oil-based polyamide that can be crosslinked by ultraviolet light, the preparation route is as follows figure 1 As shown, the reaction molar ratio -OH:-COOH:DCC:DMAP=1:2:2:0.01, specifically includes the following steps:

[0063] 1) Put 6.296g of castor oil-based elastomer and 1.812g of cinnamic acid in a 50mL round bottom flask, add 15mL of tetrahydrofuran (THF) to mix, and dissolve completely at 65°C;

[0064] 2) Dissolve 50 mg of dimethylaminopyridine (DMAP) in 500 μL of THF solution, add it to the round bottom flask of step (1), weigh 1 g of dicyclohexylcarbodiimide (DCC) and dissolve it in 4.5 mL of THF solution, add In the round bottom flask of step 1). The round bottom flask was sealed. React at 65°C for 12h. The reactant was purified in ethyl acetate to obtain a UV-crosslinkable castor oil-based polyamide.

Embodiment 3

[0066] The preparation method of castor oil-based photocrosslinked polyamide elastomer comprises the following steps:

[0067] Take 1 g of the UV-crosslinkable castor oil-based polyamide in Example 2 into a 20 mL sample bottle, add 10 mL of THF, heat until completely dissolved, place it in a UV light box, and irradiate with a 365 nm UV lamp for 0.5 h to obtain castor oil-based polyamide. Photocrosslinkable polyamide elastomer.

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Abstract

The invention discloses a preparation method of castor oil-based polyamide capable of being cross-linked by ultraviolet light, and relates to the technical field of macromolecules, the preparation method comprises the following steps: (1) adding castor oil-based functional polyamide and a photo-crosslinking functional monomer into tetrahydrofuran, and heating until dissolving; (2) dissolving dimethylaminopyridine in tetrahydrofuran, and then mixing with the mixture obtained in the step (1); and (3) dissolving a dehydrating agent in tetrahydrofuran, then mixing with the mixture obtained in the step (2), carrying out sealed reaction at 65 DEG C for 12 hours, and purifying to obtain a polymer, namely the ultraviolet-crosslinkable castor oil-based polyamide. The invention also provides a product obtained by the method and application thereof. The castor oil-based polyamide has the beneficial effect that the ultraviolet light sensitive side group endows the castor oil-based polyamide with light sensitivity. According to the invention, the preparation of the castor oil-based photo-crosslinked polyamide elastomer is realized, so that the bio-based polyamide elastomer has ultraviolet light crosslinking functionality, and the application field of castor oil-based polyamide is expanded.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to a preparation method and application of an ultraviolet light crosslinkable castor oil-based polyamide. Background technique [0002] As people's awareness of environmental protection and sustainable development continues to increase, social needs continue to expand, and traditional petroleum resources are gradually exhausted, renewable biomass-based thermoplastic elastomers are used to replace traditional non-renewable resources such as petroleum derivatives. Thermoplastic elastomers as raw materials have been a research hotspot. [0003] So far, the main raw materials of biomass-based elastomers include: oleic acid, ricinoleic acid, polylactic acid, protein, lactone, fatty acid and its derivatives, etc. These raw materials are renewable and widely sourced, and contain functional groups that are easy to process and react. However, most of the elastomers prepared from the...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08F299/02C08F2/48
CPCC08G69/48C08F299/022C08F2/48
Inventor 汪钟凯马储情
Owner ANHUI AGRICULTURAL UNIVERSITY
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