Tailoring Molecular Structures of Polyimides for Frontier Applications

Area of Science:

• Polymer Science
• Materials Science

Background:

• Polyimides (PIs) are crucial in advanced technologies due to their exceptional thermal stability, mechanical robustness, electrical insulation, and chemical resistance.
• Emerging applications demand additional functionalities like optical transparency and photosensitivity without sacrificing long-term reliability.

Purpose of the Study:

• To explore the structural tunability of polyimides for enhanced performance.
• To outline how molecular design and processing influence polyimide properties for diverse applications.

Main Methods:

• Chemical modification of the imide backbone by adjusting rigidity, polarity, and free volume.
• Incorporation of specific units like fluorinated or alicyclic groups.
• Introduction of crosslinkable end-groups and organic-inorganic hybrid structures.

Main Results:

• Tailored PI systems demonstrate versatility for various processing routes and material forms.
• Achieved diverse material forms including thermosetting resins, engineering plastics, foams, aerogels, films, coatings, and photosensitive polyimides (PSPIs).
• Established structure-processing-property relationships guide material design.

Conclusions:

• The structural versatility of polyimides enables customization for demanding technological requirements.
• Understanding structure-property relationships is key to developing advanced polyimide materials.
• Polyimides are adaptable for a wide range of applications, from aerospace to electronic packaging.