Fluorine-containing block graft polymer with thermosensitivity and preparation method and application thereof

A graft polymer, temperature-sensitive technology, applied in the field of polymer material preparation, can solve the problems of increased steric hindrance, difficult operation, harsh reaction conditions, etc.

Inactive Publication Date: 2013-04-24
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent 200610038477.4 discloses a pH-responsive fluorine-containing block copolymer and its preparation method. This method overcomes the harsh reaction conditions of traditional anionic polymerization and obtains a high conversion rate and pure product. However, the copolymer synthesized by this method is Binary block structure, single structure, harsh reaction conditions, difficult operation, and its simple assembly shape limits its application range; patent 200610038134.8 discloses an amphiphilic fluorine-containing block copolymer and its preparation method. Although the product has dual responsiveness to temperature and pH value, it still stays in the stage of binary linear block polymer, its structure is relatively simple, its synthesis method is relatively harsh, and its application range is small; patent 2

Method used

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  • Fluorine-containing block graft polymer with thermosensitivity and preparation method and application thereof
  • Fluorine-containing block graft polymer with thermosensitivity and preparation method and application thereof
  • Fluorine-containing block graft polymer with thermosensitivity and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: PHFBMA-b-(PGMA-g-PNIPAM) and its preparation

[0057] (1) Preparation of PHFBMA: 14.32 g of hexafluorobutyl methacrylate (HFBMA), 0.19 g of initiator methyl 2-bromoisobutyrate, 0.17 g of cuprous bromide, 0.05 g of bromide Add copper and 15mL anisole to a 50mL single-mouth reaction bottle and seal the bottle mouth. After bubbling argon gas-freezing-thawing three cycles for three times, add 0.52g bipyridine and continue through three cycles once, and place at 65 React in an oil bath at ℃ for 6 hours, freeze with liquid nitrogen and dilute with dichloromethane, stir and oxidize for 1 hour, remove the catalyst through neutral alumina, concentrate at room temperature for 30 minutes, precipitate in 150 mL of n-hexane, filter and evaporate the solvent, and take the residue for use After dissolving 7mL of tetrahydrofuran and 200mL of n-hexane for precipitation and cycling twice, the precipitate was collected and vacuum-dried at room temperature to obtain 9.35g of flu...

Embodiment 2

[0073] Example 2: PHFBMA-b-(PGMA-g-PDNIPAM) and its preparation

[0074] (1) Preparation of PHFBMA: same as step (1) of Example 1;

[0075] Preparation of PHFBMA-b-PGMA copolymer: same as step (1) of Example 1;

[0076] (2) Preparation of PDNIPAM: 7.46g of temperature-sensitive monomer N,N-diisopropylacrylamide, 0.28g of chain transfer agent S-dodecyl-S'-(α-methyl-α "-propargyl isopropionate) trisulfide, 0.014g initiator AIBN and 14mL of purified dioxane were all added to a 25mL single-necked flask filled with argon and sealed well, after gas blowing-freezing- After three cycles of thawing, put it in an oil bath at 75°C for 7 hours, then stop the reaction in an ice-water bath, distill off most of the dioxane under reduced pressure at 45°C and precipitate in 200mL of cold ether, take the precipitate, and dry it at 25°C Dissolve in 4mL tetrahydrofuran and precipitate in 200mL cold diethyl ether (repeat this operation 3 times), filter, take the precipitate and dry it in vacuum ...

Embodiment 3

[0086] Example 3: PHFBMA-b-(PGMA-g-PDMAEMA) and its preparation

[0087] (1) Preparation of PHFBMA: same as step (1) of Example 1;

[0088] Preparation of PHFBMA-b-PGMA copolymer: same as step (1) of Example 1;

[0089] (2) Preparation of PDMAEMA: 8.76g of temperature-sensitive monomer dimethylaminoethyl methacrylate, 0.25g of chain transfer agent S-dodecyl-S'-(α-methyl-α" -propargyl isopropionate) trisulfide, 0.018g initiator AIBN and 25mL dioxane were added to a 50mL single-necked flask filled with argon and sealed, and after three cycles of blowing-freezing-thawing, placed in After reacting in an oil bath at 65°C for 6 hours, place it in an ice-water bath to stop the reaction. Distill under reduced pressure at 46°C to remove most of the dioxane and precipitate in 200 mL of cold ether. Take the precipitate, dry it at 25°C and dissolve it in 4 mL of tetrahydrofuran. Finally, precipitate in 200mL of cold ether (repeat this operation 3 times), filter, take the precipitate and...

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Abstract

The invention discloses a fluorine-containing block graft polymer with thermosensitivity and a preparation method and application thereof. According to the invention, fluorine-containing acrylate monomers are polymerized into a macroinitiator by adopting atom transfer radical polymerization; the macroinitiator and glycidyl methacrylate are copolymerized; and after an azide group is introduced into a side chain epoxide cleavage of the obtained product, a polymer with thermosensibility is grafted by adopting the click chemical reaction so as to obtain the block graft polymer. The fluorine-containing block graft polymer has mild reaction conditions, is easy to operate and has high reaction speed and high conversion rate. The preparation method of the fluorine-containing block graft polymer with thermosensitivity, which is disclosed by the invention, is simple and convenient to operate, and has low toxicity and high product purity; and the prepared fluorine-containing block graft polymer with thermosensitivity not only has the advantages of fluorine-containing materials, but also has excellent performance of thermosensitivity and realizes function combination.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a temperature-sensitive fluorine-containing block graft polymer and its preparation method and application. Background technique [0002] With the continuous deepening of research on intelligent polymer materials and the continuous improvement of market demand, the research and development of intelligent materials with dual or even multiple responsiveness has become an important development direction in this field. For fluorine-containing intelligent polymer materials, due to the various advantages and specificities of fluorine-containing polymers, and its intelligent characteristics will respond to external environmental stimuli, this type of functional polymer materials with multiple characteristics research has received great attention. [0003] Fluorine-containing intelligent polymer materials combine their own fluorine-containing characteris...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F293/00C08F8/30A61K47/34
Inventor 庞浩蒋冰艳廖兵张磊郑景新刘海露
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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