Bis(azobenzene) diamines and photomechanical polymers made therefrom

Patent metadata

Field	Value
Publication number	US-9896545-B2
Application number	US-201715584464-A
Country	US
Kind code	B2
Filing date	May 2, 2017
Priority date	Sep 5, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

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 polymer comprising a 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 polyamic acid, comprising a reaction product of a bis(azobenzene)-diamino monomer and a dianhydride, the bis(azobenzene)-diamino monomer defined by a general chemical formula (I):

wherein L′ is selected from the group consisting of

3. A bis(azobenzene)-containing polyimide defined by a general chemical formula (II):

wherein n is a degree of polymerization;
wherein

is selected from the group consisting of

and
wherein -L- is selected from the group consisting of

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

5. The bis(azobenzene)-containing polyimide of claim 3 , wherein L is —S—.

6. The bis(azobenzene)-containing polyimide of claim 3 , wherein L is

7. The bis(azobenzene)-containing polyimide of claim 3 , wherein L is

8. The bis(azobenzene)-containing polyimide of claim 3 , wherein L is

Assignees

• Us Air Force
• Us Air Force

Inventors

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

Classifications

• C08G69/32

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

• C08G73/1042

  Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds · CPC title

• C08G73/105

  with oxygen only in the diamino moiety · CPC title

• C09B69/106

  containing an azo dye · CPC title

• C09B43/16

  linking amino-azo or cyanuric acid residues · CPC title