Unlock instant, AI-driven research and patent intelligence for your innovation.

Cyclic amphiphilic random copolymer containing azobenzene at its side chain and synthesis method thereof

A technology of random copolymers and azobenzene, which is applied in the field of amphiphilic random copolymers containing azobenzene in cyclic side chains and its synthesis, and can solve the problems of no literature reports on azobenzene ring polymers , to achieve fast trans-cis-reflective photoisomerization rate, small aggregate size, and high glass transition temperature

Inactive Publication Date: 2014-06-18
SUZHOU UNIV
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, in the study of cyclic polymers, there is no literature report on amphiphilic azobenzene cyclic polymers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cyclic amphiphilic random copolymer containing azobenzene at its side chain and synthesis method thereof
  • Cyclic amphiphilic random copolymer containing azobenzene at its side chain and synthesis method thereof
  • Cyclic amphiphilic random copolymer containing azobenzene at its side chain and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] cycle -P(BHME m - co -AA n ) synthetic route is as follows:

[0040]

[0041]

[0042] ,

[0043] Its synthetic steps are as follows:

[0044] 1. Synthesis of monomeric BHME:

[0045] (1) Synthesis of compound 4-hydroxy-4-methoxyazobenzene: In a 100mL beaker, add 30mL concentrated hydrochloric acid and 20mL deionized water, add p-methoxyaniline (6.16g) under stirring, dissolve, and the mixture Cool down to 0~5 o c. NaNO 2 (3.50g) was dissolved in about 15mL of deionized water and added dropwise to the above mixture. o C under stirring for 1 h to obtain a diazotized solution of methoxyaniline;

[0046] Add phenol (4.70g), water 100mL and NaOH (7.00g) into a 250mL beaker, stir evenly, and cool in an ice-water bath until the solution temperature is between 0 and 5 o C, the obtained diazotization solution is added dropwise in the solution of phenol, and the temperature of the reaction solution is controlled at 0 ~ 5 o c. After the dropwise addition, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a cyclic amphiphilic random copolymer containing azobenzene at its side chain and a synthesis method thereof. The structural formula of the cyclic amphiphilic random copolymer cyclic-P(BHMEm-co-AAn) is described in the specification. According to the invention, controllable active atom transfer radical polymerization (ATRP) and a high-efficiency CuAAC reaction are combined together, so the cyclic amphiphilic random copolymer with uniform molecular weight distribution and controllable hydrophilic and lipophilic chains is obtained; the cyclic amphiphilic random copolymer synthesized in the invention has a higher glass transition temperature, a faster trans-cis-trans-photo-isomerization rate and a smaller aggregate size compared with linear polymers with same molecular weight, and self-assembled aggregate has certain light response.

Description

technical field [0001] The invention belongs to the field of high molecular polymers, in particular to an amphiphilic random copolymer containing azobenzene in a cyclic side chain and a synthesis method thereof. Background technique [0002] Since the 1950s and 1960s, biologists have discovered and confirmed the structural dependence of circular DNA and cyclic gramicidin S, and cyclic polymers have received more and more attention and research because of their excellent performance. In recent years, The synthesis and performance research of cyclic compounds has become one of the important topics in the field of polymers and materials. [0003] Since the cyclic polymer has no end group to reduce intermolecular entanglement, it exhibits different physical properties from linear polymers of the same molecular weight, such as smaller hydrodynamic size, lower intrinsic viscosity and moving friction coefficient, and more Large refractive index, higher glass transition temperature...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F220/18C08F212/32C08F8/48C08F8/30C08F8/12
Inventor 周年琛周晓吉张正彪朱健朱秀林
Owner SUZHOU UNIV