A brush-shaped block polymer and its synthesis method and application

A synthesis method and technology of block copolymers, which are applied in the field of preparation of brush-like block copolymers, can solve the problems of difficulty in preparing a wide range of photonic crystal materials and complex processes, and achieve obvious temperature responsiveness and great practical value Effect

Active Publication Date: 2021-05-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the photonic crystal materials prepared by this method have obvious temperature-responsive behavior, the process is complicated and it is difficult to prepare a wide range of photonic crystal materials.

Method used

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  • A brush-shaped block polymer and its synthesis method and application
  • A brush-shaped block polymer and its synthesis method and application
  • A brush-shaped block polymer and its synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of brush block copolymer BCP1-6: its preparation route is as follows figure 1 as shown,

[0039] The general structural formula of BCP1-6 is:

[0040]

[0041] The synthesis steps of BCP1 (m=200, n=200) are as follows:

[0042] Add NBPM (57.6mg, 91.2μmol) to 10mL polymerization bottle, 1mL dry dichloromethane, add G-3 (0.41mg, 0.46×10 -3 mmol) in dichloromethane solution 0.1mL, stirred and reacted at room temperature for 30 minutes, then added 1.1mL of dichloromethane solution containing NDM (72.2mg, 91.2μmol) into the above reaction solution to continue the reaction for 1 hour, the entire addition Both reactions were carried out in a glove box. After the reaction was complete, 1 mL of vinyl ether was added to quench the reaction. Remove the glove box, precipitate in anhydrous methanol, centrifuge, and vacuum dry to obtain the brush-like block copolymer BCP1 with a main chain polymerization degree of 400, wherein the polymerization degree o...

Embodiment 2

[0055] The synthesized series of brush-like block copolymers (BCP1-BCP6) solvent volatilization self-assembly and heat treatment conditions:

[0056] The synthesized brush-like block copolymers (BCP1-BCP6) were respectively prepared with 10 mg / mL tetrahydrofuran solution, and the mixed solution was applied drop by drop on a clean horizontal glass slide, and six different polymer films were obtained after the solvent evaporated completely. , which is the one-dimensional photonic crystal material. Then the prepared one-dimensional photonic crystal thin film was heat-treated at 130°C for 30 minutes to study its temperature-sensitivity characteristics. Such as figure 2 Shown are the self-assembly pictures of BCP1-BCP6 before and after heat treatment, showing obvious light reflection phenomenon and obvious temperature-sensitive behavior. The self-assembly of BCP1 was dark purple before heating and blue after heating; the self-assembly of BCP2 was blue before heating and bright g...

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Abstract

The invention discloses a brush-like block polymer and its synthesis method and application. The synthesis method of the brush-like block copolymer comprises the following steps: dissolving NBPM, a norbornene monomer with a biphenyl structure, into In the organic solvent, add G-3 catalyst, stir the reaction at 20-40°C to homopolymerize the monomer NBPM, and then add the dissolved norbornene monomer NDM with a decanyl structure to the above reaction The reaction is continued in the liquid to realize the copolymerization of NBPM and NDM. After the reaction is completed, a terminator is added to quench the reaction, and finally the target brush-like block copolymer PNBPM-b-PNDM is obtained. The invention enables the photonic crystal material to be applied to light sensors, light valves, pigments and dyes, etc., and has great practical value.

Description

technical field [0001] The invention relates to the technical field of preparation of brush-like block copolymers, in particular to a brush-like block polymer and its synthesis method and application. Background technique [0002] Due to the existence of the internal photonic bandgap structure, photonic crystals can regulate the propagation of light waves, so that they have great application value, such as making special pigments, waveguides and reflective coatings, etc. Responsive photonic crystals are a class of materials whose reflection wavelength can change with changes in external physical or chemical conditions. In addition to the periodic structure necessary for traditional photonic crystals, this material must also have responsive groups. There are two common ways to introduce responsive groups: (1) Use responsive materials as substrates to directly construct photonic crystal structures, such as using block polymer self-assembly to prepare one-dimensional photonic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F232/08
CPCC08F293/005C08F232/08
Inventor 任丽霞张同周袁晓燕
Owner TIANJIN UNIV
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