Research Progress of Colorless and Transparent Polyimide Film
With the rapid development of flexible optoelectronic devices,the performance requirements of flexible substrates based on colorless transparent polymer films are becoming higher and higher.Among them,polyimide(PI),as the tip of the pyramid of polymer materials,is the most powerful candidate because of its excellent heat resistance,mechanical properties,chemical stability and dielectric properties.Therefore,on the basis of maintaining the advantages of traditional colored PI,how to achieve colorless and transparent PI had become a research hotspot in recent years.In this paper,the effects on the key properties of colorless transparent PI(CPI)were discussed,from the aspects of molecular structure design(such as introduction of strong electronegative groups,alicyclic structure and large volume side groups,et al.)and preparation(including preparation method and solvent).And it was summarized and prospected.
PolyimideColorless and TransparentFilmPreparationMolecular Structure Design
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