Bis(azobenzene) diamines and photomechanical polymers made therefrom

Patent metadata

Field	Value
Publication number	US-10301430-B2
Application number	US-201715715414-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Sep 5, 2014
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.

First claim

What is claimed is:

1. A bis(azobenzene)-containing copolyimide comprising a bis(azobenzene)-diamino monomer, a dianhydride, and a non- bis(azobenzene) diamine, the bis(azobenzene)-diamino monomer defined by a general chemical formula (I):

wherein L′ is selected from the group consisting of

2. A bis(azobenzene)-containing copolyimide defined by a general chemical formula (III):

wherein n is a degree of polymerization; wherein x is in a range from about 0.01 to about 0.99 mol %;
wherein

is selected from the group consisting of

wherein —L— is selected from the group consisting of

and
wherein

is selected from the group consisting of

3. The bis(azobenzene)-containing copolyimide of claim 2 , wherein L is —O—.

4. The bis(azobenzene)-containing copolyimide of claim 2 , wherein L is —S—.

5. The bis(azobenzene)-containing copolyimide of claim 2 , wherein L is

6. The bis(azobenzene)-containing copolyimide of claim 2 , wherein L is

7. The bis(azobenzene)-containing copolyimide of claim 2 , wherein L is

Assignees

• Us Air Force

Inventors

• Tan Loon-Seng
• Wang David Huabin
• Wie Jeong Jae
• White Timothy J

Classifications

• C08G73/1064

  containing sulfur · CPC title

• C09B43/16

  linking amino-azo or cyanuric acid residues · CPC title

• C08G73/1039

  comprising halogen-containing substituents · CPC title

• C08G73/1085

  Polyimides with diamino moieties or tetracarboxylic segments containing heterocyclic moieties · CPC title

• C08G69/32

  from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound · CPC title