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A photoresponsive methyl methacrylate azo polymer and its synthesis method

A technology of methyl methacrylate and methyl methacrylate, which is applied in the field of polymer synthesis and preparation, and achieves the effects of high yield, mild reaction conditions and simple preparation method

Active Publication Date: 2018-07-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Belongs to the field of polymer synthesis

Method used

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  • A photoresponsive methyl methacrylate azo polymer and its synthesis method
  • A photoresponsive methyl methacrylate azo polymer and its synthesis method
  • A photoresponsive methyl methacrylate azo polymer and its synthesis method

Examples

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Embodiment 1

[0035] (1) Synthesis of azo monomer: at 0°C, with dichloromethane as solvent, slowly drop 0.01mol / L 4-(4-nitrophenylazo)-1-naphthol solution into toluene In base acrylic acid, the molar mass ratio of 4-(4-nitrophenylazo)-1-naphthol to methacrylic acid is 2:1; add 4-dimethylaminopyridine (DMAP) and dicyclohexyl carbon to the system Diimine (DCC), the molar mass ratio of DMAP and DCC is 1:5. First react at 0°C for 2 hours, then raise the temperature to 25°C, and continue the reaction for 12 hours to obtain the azo monomer. The structural formula is:

[0036]

[0037] (2) Synthesis of methyl methacrylate-based azo polymers: carry out polycondensation reaction between methyl methacrylate and the synthesized azo monomer in a molar mass ratio of 1:10, and the addition amount of the initiator AIBN is 1% of the amount of methyl acrylate added. First add methyl methacrylate and AIBN into the container, blow nitrogen at 25°C to remove oxygen in the system; then slowly add the azo ...

Embodiment 2

[0039] (1) Synthesis of azo monomer: at 0°C, with dichloromethane as solvent, slowly drop 0.1mol / L 4-(4-nitrophenylazo)-1-naphthol solution into toluene In the base acrylic acid, the molar mass ratio of 4-(4-nitrophenylazo)-1-naphthol to methacrylic acid is 1:1. Add 4-dimethylaminopyridine (DMAP) and dicyclohexylcarbodiimide (DCC) to the system, the molar mass ratio of DMAP and DCC is 1:10; first react at 0°C for 2 hours, then heat up to 25°C , continue to react for 12 hours to obtain azo monomer. The structural formula is:

[0040]

[0041] (2) Synthesis of methyl methacrylate azo polymer: methyl methacrylate and the azo monomer synthesized in step 1 are subjected to polycondensation reaction in a ratio of 1:15 by molar mass ratio, the addition amount of initiator AIBN 3% of the amount of methyl methacrylate added. First, add methyl methacrylate and AIBN into the container, blow nitrogen at 25°C to remove oxygen in the system; then slowly add the azo monomer prepared in...

Embodiment 3

[0048] (1) Synthesis of azo monomer: at 0°C, with dichloromethane as solvent, slowly drop 1mol / L 4-(4-nitrophenylazo)-1-naphthol solution into methyl In acrylic acid, the molar mass ratio of 4-(4-nitrophenylazo)-1-naphthol to methacrylic acid is 1:5. Add 4-dimethylaminopyridine (DMAP) and dicyclohexylcarbodiimide (DCC) to the system, the molar mass ratio of DMAP and DCC is 1:20; first react at 0°C for 5 hours, then heat up to 25°C , continue to react for 24 hours to obtain azo monomer. The structural formula is:

[0049]

[0050] (2) Synthesis of methyl methacrylate azo polymer: carry out polycondensation reaction with methyl methacrylate and the azo monomer synthesized in step 1 in a molar mass ratio of 1:100, the addition amount of initiator AIBN 5% of the amount of methyl methacrylate added. First add methyl methacrylate and AIBN into the container, blow nitrogen at 25°C to remove oxygen in the system; then slowly add the azo monomer prepared in step 1 to the system d...

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Abstract

The invention relates to light-responding methyl methacrylate azo polymer and a synthetic method thereof; azobenzene is dissolved in dichloromethane and is dropwise added at 0 DEG C into a system with methacrylic acid and a catalyst 4-dimethylamino-pyridine, and nitrogen is introduced to remove air in the system; a dewatering agent dicyclohexylcarbodiimide is dropwise added into the system and is reacted at 0 DEG C for 2-5 hours, and the temperature is raised to 25 DEG C for reacting for 12-24 hours to obtain an azo monomer with olefin group at one end; methyl methacrylate and an initiator AIBN (azodiisobutyronitrile) are added into a container, nitrogen is introduced to remove oxygen in the system, the azo monomer of step 1 is dropwise added into the system to enable reacting at 60-90 DEG C, and reacting is carried out for 3-8 hours to obtain the light-responding methyl methacrylate azo polymer. The preparation method is simple, the azo polymer material has good light response and high stability, and the synthetic method for the light-responding methyl methacrylate azo polymer is provided.

Description

technical field [0001] The invention relates to a photoresponsive methyl methacrylate azo polymer and a synthesis method thereof, which are used in information storage, optical switches, photochromic materials, surface relief gratings, liquid crystal materials, sensors, and organic field effect films Transistors and other fields have broad application prospects. The invention belongs to the field of polymer synthesis preparation. Background technique [0002] Light energy has the advantages of being clean and pollution-free, without medium transmission, easy to control and use, and has a wide range of sources. Therefore, in recent years, materials that can effectively convert light energy into mechanical energy have attracted more and more attention from scholars. Azobenzene and its derivatives can be used as photoresponsive chromophores and ordered liquid crystal structures to prepare polymer materials with good photoresponsive properties (Haifeng Yu, “Recent Advances in P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/36C08F220/14
CPCC08F220/36C08F220/14
Inventor 封伟李双雯冯奕钰
Owner TIANJIN UNIV
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