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A kind of phenolic-based renewable polymer material and its preparation method and regeneration application

A polymer material and phenolic-based technology, which is applied in the field of phenolic-based renewable polymer materials and their preparation, can solve the problems of difficult to meet the application requirements of polyurethane, poor heat resistance and mechanical properties of materials, and material application limitations, etc., to achieve large The effect of degree of freedom, low cost and mature technology

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A polyhydroxypolyurethane (Journal of the American Chemical Society, 2015, 137:14019) prepared by Williams et al. of Northwestern University in the United States has reworkability, but its glass transition temperature is only 54°C, and the application of the material is limited.
In summary, although the prior art has paid attention to the dynamic properties of urethane bonds, the heat resistance and mechanical properties of the prepared materials are poor, the tensile strength is only 3MPa, and the Young's modulus is 4MPa, which is difficult to meet the requirements of polyurethane Application requirements in foam plastics, elastomers, coatings and adhesives

Method used

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  • A kind of phenolic-based renewable polymer material and its preparation method and regeneration application
  • A kind of phenolic-based renewable polymer material and its preparation method and regeneration application
  • A kind of phenolic-based renewable polymer material and its preparation method and regeneration application

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preparation example Construction

[0043] A method for preparing a phenolic-based renewable polymer material according to an embodiment of the present invention. The phenolic-based renewable polymer material is formed by the reaction of a thermoplastic phenolic resin and an aromatic polyisocyanate compound, and can be formed by "solid crushing-molding" " process or "tertiary amine aprotic solvent dissolution-precipitation" process to realize its regeneration, and the preparation steps specifically include:

[0044] Step 1: Take 100 parts of thermoplastic phenolic resin and 40 to 1000 parts of organic solvent according to the number of parts by mass, put them in a reaction kettle with a reflux device, stir them to mix them evenly, and obtain a phenolic resin solution, that is, a solution A;

[0045] The second step: for solution A, according to the molar ratio of phenolic hydroxyl group and isocyanate group (10-1): 1, the aromatic polyisocyanate compound is dissolved in an organic solvent to obtain a polyisocyan...

Embodiment 1

[0066] see figure 1 , in the embodiment of the present invention, the preparation of TDNR2.0: According to the number of parts by mass, add 100 parts of random phenolic resin 8063# and 200 parts of acetone into the reactor with reflux device, stir and mix evenly to obtain phenolic resin Resin solution (solution A); add 41 parts of 2,4-TDI and 41 parts of acetone into a flask with reflux, stir and mix well to obtain solution B; mix solution A and solution B, and stir at room temperature Uniform, when the resin is gelled, move it into a vacuum oven (vacuum degree is 0.01MPa), remove the solvent at 40°C, and obtain a cross-linked polymer material, which is marked as TDNR2.0.

[0067] TDNR2.0 is regenerated through the process of "solid crushing-molding molding": crush TDNR2.0 into powder with a pulverizer, evenly spread the TDNR2.0 powder in the cavity of the metal mold, and mold it at 180°C / 4MPa for 1 hour , to obtain a transparent resin block.

[0068] TDNR2.0 is regenerated ...

Embodiment 2

[0080] In the embodiment of the present invention, the preparation of MDNR2.0: according to the number of parts by mass, add 100 parts of high ortho phenolic resin 3490# and 60 parts of N,N-dimethylformamide into a reaction kettle with a reflux device , stirred and mixed uniformly to obtain a phenolic resin solution (solution A); 59 parts of 4,4'-diphenylmethane diisocyanate and 17.7 parts of N,N-dimethylformamide were added to a flask with reflux , stirred and mixed evenly to obtain solution B; mixed solution A and solution B, stirred evenly at 50°C, moved into a vacuum oven (vacuum degree of 0.01MPa) after the resin gelled, and removed the solvent at 80°C to obtain cross-linked Linked polymer materials, denoted as MDNR2.0.

[0081] The obtained MDNR2.0 has a glass transition temperature of 148° C., a tensile strength of 57 MPa, and a modulus of 1.6 GPa.

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Abstract

The invention discloses a phenolic-based renewable polymer material and its preparation method and regeneration application, comprising the following steps: step 1, taking thermoplastic phenolic resin according to the molar ratio of phenolic hydroxyl group to isocyanate group (10-1):1 and aromatic polyisocyanate compound; step 2, dissolving the thermoplastic phenolic resin taken out in step 1 in an organic solvent, stirring, to obtain a phenolic resin solution; dissolving the aromatic polyisocyanate compound taken out in step 1 in an organic solvent to obtain polyphenolic resin Isocyanate compound solution; step 3, mixing the phenolic resin solution and the polyisocyanate compound solution, and treating the mixed solution to obtain a phenolic-based renewable polymer material. The polymer material obtained by the invention has excellent heat resistance and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a phenolic-based renewable polymer material, a preparation method and regeneration application thereof. Background technique [0002] Traditional thermosetting polymers have excellent mechanical properties, chemical stability, and thermal stability due to the existence of cross-linked structures, but at the same time it is difficult to effectively recycle them, which will cause serious environmental pollution and waste of resources. As one of the traditional thermosetting polymers, phenolic resin has a strong reactivity of the phenolic hydroxyl group on the phenol ring, and the cross-linking of thermoplastic phenolic resin can be realized by using its reactivity. offers the possibility. [0003] Since the first report by Wicks in 1975 (Z.W.Wicks, Progress in Organic Coatings, 1975), the blocking and unblocking of isocyanate groups has received widespread at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/54C08G18/64C08G18/32C08G18/65C08J11/08C08L75/04C08L97/02C08K7/14C08J5/24C08J5/04C09J175/04C08J9/28B29B13/10B29C43/00B29C43/02
CPCB29B13/10B29C43/003B29C43/02C08G18/3215C08G18/542C08G18/6484C08G18/6492C08G18/6511C08J5/043C08J5/24C08J9/286C08J11/08C08J2201/0502C08J2375/04C08J2497/02C08K7/14C09J175/04Y02W30/62
Inventor 井新利刘晓琴行小龙李瑜王淑娟
Owner XI AN JIAOTONG UNIV
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