Polyimide Fibers with High Strength and High Modulus: Preparation, Structures, Properties, and Applications

Area of Science:

• Polymer Science
• Materials Science
• Organic Chemistry

Background:

• High strength and high modulus polyimide (HSHMPI) fibers are advanced organic materials.
• These fibers exhibit high initial modulus (>90 GPa) and tensile strength (>2.5 GPa).
• They find applications in electronics, aerospace, and atomic energy.

Purpose of the Study:

• To extensively summarize HSHMPI fibers.
• To discuss synthetic methods, molecular structure, morphology, microstructures, and properties.
• To analyze development trends and application prospects.

Main Methods:

• Review of existing literature on HSHMPI fiber synthesis and characterization.
• Discussion of one-step and two-step synthetic pathways, including wet-spinning and thermal imidization.
• Analysis of structure-property relationships.

Main Results:

• HSHMPI fibers possess superior mechanical properties.
• The two-step method (wet-spinning followed by thermal imidization) is key for industrialization.
• Molecular structure and synthesis technology significantly influence fiber performance.

Conclusions:

• HSHMPI fibers represent a significant advancement in high-performance materials.
• Understanding synthesis-structure-property relationships is crucial for optimizing fiber performance.
• Future development holds promise for expanded applications in advanced industries.