Graft copolymer based on carbazole capable of controlling self-assembled structure and method of synthesizing the same

Patent metadata

Field	Value
Publication number	US-9944756-B1
Application number	US-201615377047-A
Country	US
Kind code	B1
Filing date	Dec 13, 2016
Priority date	Oct 6, 2016
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A carbazole-based graft copolymer capable of controlling a self-assembled structure and a method of synthesizing the same are provided. Specifically, the copolymer is capable of controlling a self-assembled structure which can control the morphology of a polymer structure and the size of pores by controlling the molecular weights of polylactic acid (PLA) functioning as a coil and of a carbazole copolymer to prepare a poly(carbazole)-coil graft copolymer of Formula 1 below and the method of synthesizing the same is provided. In Formula 1, X represents 0.05 to 0.1, m represents an integer of 7 to 8, and n represents an integer of 56 to 84.

First claim

What is claimed is:

1. A carbazole-based graft copolymer capable of controlling a self-assembled structure represented by the following Formula 1:

wherein X represents 0.05 to 0.1, m represents an integer of 7 to 8 and n represents an integer of 56 to 84.

2. The carbazole-based graft copolymer according to claim 1 , wherein a carbazole-based copolymer as a main chain in the copolymer of Formula 1 has a number average molecular weight of from about 5,000 to 7,000 g/mol and a poly(lactic acid) copolymer as a side chain therein has a number average molecular weight of from about 4,000 to 6,000 g/mol.

3. A method of preparing a carbazole-based graft copolymer capable of controlling a self-assembled structure comprising click-reacting a polycarbazole copolymer represented by the following Formula 2 with a poly(lactic acid) polymer represented by the following Formula 3 to synthesize a carbazole-based graft copolymer represented by the following Formula 1:

wherein X represents 0.05 to 0.1, m represents an integer of 7 to 8, and n represents an integer of 56 to 84.

4. The method according to claim 3 , wherein the copolymer of Formula 2 is produced by substituting a bromine (Br) functional group of a polycarbazole copolymer represented by the following Formula 4 with azide (N 3 ):

wherein X represents 0.05 to 0.1 and m represents an integer of 7 to 8.

5. The method according to claim 4 , wherein the copolymer of Formula 4 is produced by polymerizing a carbazole monomer represented by the following Formula 5, a carbazole monomer represented by the following Formula 6 and a carbazole monomer represented by the following Formula 7,
wherein the polymer of Formula 4 has a bromine (Br) content of 5 to 10 mol %, a number average molecular weight of from about 5,000 to 7,000 g/mol and a PDI of from about 1.5 to 2

6. The method according to claim 3 , wherein the polymer of Formula 3 is produced by polymerizing a lactone compound represented by the following Formula 8 with an alcohol compound represented by the following Formula 9, wherein the polymer of Formula 3 has a number average molecular weight of from about 4,000 to 6,000 g/mol

Assignees

• Hyundai Motor Co Ltd
• Korea Advanced Inst Sci & Tech

Inventors

• Song You Jung
• Lee Ju Hee
• Kim Won Jung
• Kim Bum Joon
• Kim Young Kwon
• Kim Hyun Jeong

Classifications

• C08G73/0672 Primary

  with only one nitrogen atom in the ring · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C08L65/00

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• C08G2261/72

  Derivatisation · CPC title

• C08G2261/51

  Charge transport · CPC title