Poly(imide-amide) Copolymer for Display Substrates
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Solution Overview
Problem
Current colorless transparent materials lack sufficient chemical resistance, heat resistance, mechanical strength, and flexibility to meet the demands of high-resolution display devices and miniaturized information devices.
Innovation Solution
A poly(imide-amide) copolymer with specific structural units and inorganic particles or precursors is developed, forming a cross-linking structure that enhances chemical resistance, thermal stability, mechanical strength, and flexibility, while maintaining optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional colorless transparent materials are used, then basic transparency is achieved, but chemical resistance, heat resistance, mechanical strength, and flexibility are insufficient
Solution Approach 1:
The patent uses poly(imide-amide) copolymer as a composite material that combines the advantages of polyimide (heat resistance) and polyamide (chemical resistance and flexibility). This composite material structure allows simultaneous achievement of multiple properties without requiring multiple separate materials, thus improving reliability while controlling device complexity.
Solution Approach 2:
The patent modifies the chemical structure parameters of the polymer by introducing specific structural units (Formulae 1-7 with various R groups) and controlling the ratio of imide and amide units. By changing these molecular parameters, the material achieves optimized chemical resistance, heat resistance, mechanical strength, and flexibility simultaneously.
2Strength
If material properties are enhanced for high-resolution display devices, then performance requirements are met, but material complexity increases
Solution Approach 1:
The poly(imide-amide) copolymer structure is designed to provide multiple functions simultaneously: mechanical strength from the copolymer backbone, heat resistance from imide units, chemical resistance from amide units, and flexibility through specific R group substitutions. This multi-functionality eliminates the need for complex multi-material systems while meeting all performance requirements.
3Reliability
If cross-linking structure is introduced to enhance chemical and thermal resistance, then durability is improved, but flexibility may be compromised
Solution Approach 1:
The patent introduces cross-linking structures at specific locations within the polymer chains through strategic placement of R groups (such as R10-R211 in Formula 4) that can form cross-links. This localized cross-linking approach provides thermal stability and chemical resistance where needed while maintaining overall chain flexibility, thus resolving the contradiction between durability and flexibility.
Data Source
AI summary
A poly(imide-amide) copolymer including a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3:wherein substituents, groups and variables in Chemical Formulae 1 to 3 are as defined in the specification.