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Polymer containing multiple functional groups at end of the same and preparation method thereof

A functional group, polymer technology, applied in the field of polymer material synthesis, can solve problems such as limited application and synthesis difficulties

Inactive Publication Date: 2008-01-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are still great difficulties in the synthesis of polymers with multiple functional groups at the end group, which limits their application in polymer synthesis and industry.

Method used

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  • Polymer containing multiple functional groups at end of the same and preparation method thereof
  • Polymer containing multiple functional groups at end of the same and preparation method thereof
  • Polymer containing multiple functional groups at end of the same and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A 500mL ampoule was vacuum-degassed for 2 hours under infrared lamp baking, and after purging oxygen with nitrogen, 4mL of dry tetrahydrofuran, 120mL of cyclohexane and 10mL of styrene were added to the ampoule. The calculated amount of initiator (1.93 mL, 3.03 mmol) was then quickly injected with a syringe. The reaction was continued for 8 h at room temperature, and then, a mixed solution of 3 mL of 1-ethoxyethyl-2,3-epoxypropyl ether and 4 mL of tetrahydrofuran was added with a syringe, and methanol was added to terminate the reaction after overnight reaction. Concentrate the obtained solution, precipitate it in a large amount of methanol, and dry it under vacuum at 45°C for 12 hours to obtain a white polymer powder, that is, styrene whose end group contains a protected hydroxyl group and an "active" hydroxyl group. The reaction structure formula is:

[0041]

[0042] Add about 2.0 g of the above terminal-functionalized polystyrene into a 100 mL round-bottomed flas...

Embodiment 2

[0045] About 6.0 g of the functionalized polystyrene in Example 1 containing protected hydroxyl groups and "active" hydroxyl groups at the end groups was added to a clean 100 mL round bottom flask, and toluene was added for azeotropic water removal. Then add 150mL THF to dissolve the polymer, and add the polymer solution into a 250mL ampoule, and fill the system with nitrogen to make the internal and external pressures the same. Then add benzhydryl potassium solution under magnetic stirring to carry out protonation reaction to the hydroxyl group of the polymer end group, until the color of the system becomes benzhydryl potassium solution - dark brown, the ampoule bottle is placed in an ice-water bath, Let cool well. 1.5 mL of propyne bromide was added dropwise within 2 h via a syringe, and the reaction was continued for 24 h at room temperature. The salt in the system was separated by centrifugation, most of the solvent was removed by rotary evaporation from the supernatant, ...

Embodiment 3

[0050] Add about 2.0 g of the functionalized polystyrene in Example 2 containing alkyne groups and "active" hydroxyl groups at the same time into a clean 100 mL round bottom flask, add toluene to azeotropically remove water; then add 30 mL of refined anhydrous pyridine The polymer was dissolved, and the polymer solution was placed in an ice-water bath. Then under magnetic stirring, 0.50 mL of bromoisobutyryl bromide was added dropwise within 0.5 h, and the reaction was continued for about 24 h. The functionalized polystyrene of alkynyl and a bromine atom, its reaction structure is:

[0051]

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PUM

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Abstract

The invention belongs to the polymer synthesis technical field, specifically provides a polymer whose end groups contain various functional groups and a preparation method of the polymer. The invention uses polymer active carbanions induced by lithium alkyl to have quantitative cap reaction with heterocylic small molecules compounds (epoxy and episulfide compounds) containing protective group subsituents, namely one carbanion can only make the ring of one cyclic compound opened and a new active hydroxyl or mercapto is produced at the same time, therefore, the polymer end groups both contain one or a plurality of protective end groups and active hydroxyl or mercapto polymers. Then functionalized polymers with various combinations are obtained through the selective modification by the functional groups of the end groups of the polymers. In the invention, the end groups fictionalization is in high efficiency and strong universality. Moreover, the polymers can be used for designing the polymers with complex structure.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a polymer whose terminal group contains multiple functional groups and a preparation method thereof. Background technique [0002] Polymers with specific functional groups at their end groups are of great significance in both scientific research and practical applications. The potential applications of polymers can be investigated in a wide range by exploiting the reactivity of polymer terminal functional groups. In the field of polymer synthesis, this polymer can be used as a macromolecular initiator to prepare polymers with structures such as star-shaped hybrid arms, sparse types, grafts, rings, blocks, and networks. offers the possibility. In practical industrial applications, polymer chains can form special aggregated forms (in solution) or microphase structures (in bulk) by utilizing special interactions between specific functional groups, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08F12/08C08F36/08C08F36/06C08F26/06C08F20/10C08F4/48
Inventor 黄骏廉王国伟
Owner FUDAN UNIV
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