Application examples of Azo initiators
Azo polymerization initiators are used as catalysts and foaming agents in organic processes, in addition to in polymer synthesis.
![Azo initiator decomposition reaction (radical generation)](image/example_img_01.png)
Polymer Synthesis
Radical polymerization of styrene
![Radical polymerization of styrene Propagation reaction](image/example_img_02.png)
Radical polymerization of acrylic ester
![Radical polymerization of acrylic acid ester Propagation reaction](image/example_img_03.png)
Copolymerization of styrene and acrylic ester
![Propagation Reaction of Radical Copolymerization Using Styrene and Acrylate](image/example_img_04.png)
Catalyst for Organic Synthesis
Addition reaction to olefins
Azo polymerization initiators can be used for addition reactions of HBr, H2S, etc. to olefins. Especially, when using styrenes, bromine or mercapto groups may be selectively introduced to the β position.
![Radical Addition of Hydrogen Bromide to Olefins Using Azo Initiators](image/example_img_05.png)
Mitsunobu reaction※1
Azo compounds※2 can be used as reagents for the Mitsunobu reaction.
![Nucleophilic Substitution Reaction Using Azo Initiator (Mitsunobu Reaction)](image/example_img_06.png)
※2 Azo compounds: Bis (2-methoxyethl) azodicarboxylate, etc.
Foaming Agent
Azo polymerization initiators are used as foaming agents for vinyl chloride (PVC) or other plastics, taking advantage of the property of generating nitrogen gas.