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Thermoplastic material capable of being chemically degraded and recycled and preparation method thereof

A thermoplastic material and chemical degradation technology, applied in the field of polymer material synthesis, can solve the problems of waste of resources and low recycling rate of thermoplastic materials

Active Publication Date: 2022-07-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The demand for thermoplastic materials is large. If the synthesis process is complicated or the recycling rate of thermoplastic materials after synthesis is low, it will easily lead to waste of resources.

Method used

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  • Thermoplastic material capable of being chemically degraded and recycled and preparation method thereof
  • Thermoplastic material capable of being chemically degraded and recycled and preparation method thereof
  • Thermoplastic material capable of being chemically degraded and recycled and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0058]Based on the chemically degradable and recyclable thermoplastic material provided above, the present invention also provides a method for preparing a chemically degradable and recyclable thermoplastic material, comprising:

[0059] The cyclooctene monomer and the diene monomer or the cyclooctene monomer and the polyolefin monomer are contacted under the action of the second-generation Grubbs catalyst, and the intermediate is obtained by metathesis and copolymerization;

[0060] The intermediate is hydrogenated with hydrogen to obtain a thermoplastic material that can be chemically degraded and recycled;

[0061] Wherein, the chemically degradable and recyclable thermoplastic material has the general structural formula shown in formula (I):

[0062]

[0063] Wherein, X is selected from one or more diene monomers or polyolefin monomers selected from esters, acid anhydrides, phosphines, silyl ethers, amides and ethers; n and m are both positive integers ; n represents t...

Embodiment 1

[0070] Example 1 (preparation of chemically degradable recycled thermoplastic material):

[0071]

[0072] Under nitrogen atmosphere, in a 100mL reaction flask (from Schlenk), add cyclooctene monomer (15mmol, 1.7g), diene monomer (0.015mmol) and 40mL anhydrous dichloromethane, put the reaction flask into In an oil bath at 40°C, the second-generation Grubbs catalyst (4 μmol, 3 mg) was dissolved in 1 mL of dichloromethane (DCM), and injected into the reaction flask, and the reaction was continued for 3 h. After the reaction was completed, the solvent was concentrated and added. 100 mL of methanol was used to separate out the polymer, which was filtered, washed and dried. Then the dried polymer was added to the autoclave, 40 mL of toluene solvent and tris(triphenylphosphine) rhodium chloride (10 μmol, 9 mg) catalyst were added, the reactor was closed, and H 2 , adjust the pressure to 20atm, after 5h of reaction, remove H 2 , 100 mL of methanol was added to the reaction kettl...

Embodiment 2

[0081] Example 2 (Degradation and Recovery of Chemically Degradable Recyclable Thermoplastics):

[0082] The chemically degradable and recyclable thermoplastic material prepared by the above-mentioned embodiment is put into a beaker, and a hydrochloric acid solution or a sodium hydroxide solution or a tetrabutylammonium fluoride solution is added. After heating under reflux for 5 hours, the material was completely degraded and dissolved in the solution, the solution was concentrated, methanol was added to separate out the recovered polymer, and the recovered polymer was dried.

[0083] like image 3 As shown, it can be seen that the chemically degradable and recyclable thermoplastic material prepared by the diene monomer numbered M2 and the cyclooctene monomer can break the ester bond and complete the degradation.

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Abstract

The invention provides a thermoplastic material capable of being chemically degraded and recycled and a preparation method thereof, the thermoplastic material capable of being chemically degraded and recycled has a structural general formula as shown in a formula (I), and in the formula (I), X is selected from one or more alkadiene monomers or multi-olefin monomers of ester groups, acid anhydrides, phosphine oxides, silyl ethers, amides and ethers; n and m are positive integers.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a chemically degradable and recyclable thermoplastic material and a preparation method thereof. Background technique [0002] Thermoplastic refers to the property that a substance can flow and deform when heated, and can maintain a certain shape after cooling. Most linear polymers exhibit thermoplastic properties and are easily processed by extrusion, injection or blow molding. [0003] Due to the development of material technology, more and more product designs are applied to thermoplastic materials. The demand for thermoplastic materials is large. If the synthesis process is complicated or the recycling rate of the synthesized thermoplastic materials is low, it will easily lead to waste of resources. Therefore, there is still a need to synthesize new thermoplastic materials in the art. SUMMARY OF THE INVENTION [0004] In view of this, the main purpose o...

Claims

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Application Information

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IPC IPC(8): C08F8/04C08F232/04
CPCC08F8/04C08F232/04Y02W30/62
Inventor 陈昶乐司桂福
Owner UNIV OF SCI & TECH OF CHINA
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