914222-92-7Relevant articles and documents
Diamine compound as well as preparation method and application thereof
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Paragraph 0128; 0130-0131, (2020/05/14)
The invention discloses a diamine compound as well as a preparation method and application thereof. A diamine compound monomer containing a carboxyl structure is designed and is introduced into a mainchain of a polyamide acid molecule, and therefore, in a process of curing a polyamic acid solution to form a film, carboxyl groups in the molecular main chain and amino groups at the tail end of themolecular chain are subjected to an imidization reaction, a cross-linking reaction occurs between free molecular chains, the movement of the molecular chain is limited by the cross-linking reaction among molecules, the molecular structure stability is improved, heat resistance, dimensional stability and the mechanical property of a flexible substrate material are guaranteed, and the problem that the viscosity and the solid content of polyimide precursor polyamide acid slurry and heat resistance stability, thermal expansion property and the mechanical property of a polyimide film cannot meet the process conditions of a flexible display process at the same time is solved.