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Photochromic polyester and preparation method and application thereof

A technology of photochromism and polyester, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, optics, etc., can solve the problems of poor mechanical properties, high price, low glass transition temperature, etc., and achieve high production efficiency, easy operation, The effect of excellent mechanical properties

Active Publication Date: 2020-11-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a photochromic polyester and its preparation method and application, to overcome the shortcomings of existing photochromic polyesters such as poor mechanical properties, low glass transition temperature and high price

Method used

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  • Photochromic polyester and preparation method and application thereof
  • Photochromic polyester and preparation method and application thereof
  • Photochromic polyester and preparation method and application thereof

Examples

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preparation example Construction

[0055] In some embodiments, the preparation method includes: reacting the first mixed reaction system at 160-260° C. for 2-6 hours to obtain an intermediate product.

[0056] In some embodiments, the preparation method includes: reacting the second mixed reaction system in a vacuum environment at 200-300°C for 1-8 hours to obtain a photochromic polyester, and the vacuum degree of the vacuum environment is 300Pa the following.

[0057] In some embodiments, the preparation method specifically includes: making components containing component A (ie, azobenzene compound), component B (ie, aromatic dibasic acid or its esterified product), component C (ie, the second fatty Dihydric alcohol), esterification or transesterification catalyst, react at 160-260°C for 2-6h to obtain intermediate product; then add polycondensation catalyst and react at 200-300°C for 1-8h under vacuum condition to obtain photochromic polymer ester.

[0058] Further, the preparation method of the photochromi...

Embodiment 1

[0101] Mix azobenzenediol (Formula 3), dimethyl terephthalate, and decanediol (the second fatty diol) in a molar ratio of 0.01:1:0.99, and then add the catalyst (tetrabutyl titanate Esters, based on dimethyl terephthalate is 0.2mol%) and catalyst (antimony trioxide, based on dimethyl terephthalate is 0.15mol%), join in the reactor, under nitrogen protection condition, be heated up to 160°C, react for 6h, vacuum degree is 60Pa, heat up to 200°C, react for 6h to obtain photochromic copolyester (structure as formula 4), its glass transition temperature is 26°C, tensile strength is 30MPa, elongation at break The elongation rate is 400%, the number of cycle stability is more than 100 times, and the photochromic response speed is 10 seconds.

[0102] The 1HNMR spectrum of the azobenzenediol compound in the present embodiment is as follows figure 1 Shown, the 1HNMR spectrum of the finally obtained photochromic polyester please refer to figure 2 , please refer to the DSC curve of t...

Embodiment 2

[0105] Mix azobenzenediol (formula 3), dimethyl isophthalate, and decanediol (the second fatty diol) in a molar ratio of 0.05:1:0.95, and then add the catalyst (tetrabutyl titanate Esters, based on dimethyl isophthalate is 0.2mol%) and catalyst (antimony trioxide, based on dimethyl isophthalate is 0.1mol%), join in the reactor, under nitrogen protection condition, be heated up to 210°C, react for 3 hours, vacuum degree is 60Pa, heat up to 260°C, react for 4.0h to obtain photochromic polyester (structure as formula 5), ​​its glass transition temperature is 25°C, tensile strength is 20MPa, elongation at break The elongation rate is 170%, the number of cycle stability is more than 100 times, and the photochromic response speed is 10 seconds.

[0106]

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Abstract

The invention discloses photochromic polyester and a preparation method and application thereof. The photochromic polyester has a structure shown in the specification, wherein Rm and Rn are independently selected from H, F, Cl, Br, I, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, nitryl, methoxyl and the like, m is an integer from 1 to 4, n is an integer from 5 to 8, p is 20-200, q is 20-200,Ra is a residue of aromatic dibasic acid, and Rb is a residue of fatty dibasic alcohol. The preparation method comprises the following step: copolymerizing an aromatic dibasic acid compound or an ester thereof with an azobenzene compound and other dihydric alcohols to prepare the photochromic polyester. The photochromic response speed of the photochromic polyester prepared by the method is less than 20 seconds, and the photochromic polyester has good mechanical strength and flexibility and high photochromic speed and mechanical properties, and has great potential application significance in information storage elements and self-developing holographic recording photographic materials so as to promote the development of thermoplastic polyester functionalization.

Description

technical field [0001] The invention relates to a polyester material, in particular to a photochromic polyester and its preparation method and application, and belongs to the technical field of polymer materials. Background technique [0002] Photochromic material means that under the stimulation of a specific wavelength light source, the molecular structure of the material changes accompanied by a color change. Under another specific wavelength light source or other stimuli, the molecular structure of the material recovers, and the color also recovers before the change. In the 1960s, Corning Corporation of the United States first discovered and produced the first photochromic material. After decades of development, the types, applications and performance of such materials have been continuously expanded and improved. In the contemporary world, photochromic materials are widely used in various fields, such as: decorative and protective packaging materials, smart windows, opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08G63/78C09K9/02G03H1/02
CPCC08G63/6856C08G63/78C09K9/02C09K2211/14G03H1/02G03H2001/0264G03H2260/52
Inventor 刘小青曹丽军江艳华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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