Enhanced thermal conductivity in copolymerized polyimide.

Area of Science:

• Polymer Science
• Materials Science
• Nanotechnology

Background:

• Polymers are integral to modern technology, with high thermal conductivity crucial for applications requiring effective heat dissipation.
• The intrinsic thermal conductivity of bulk polymers is limited by entangled polymer chain conformations.
• Improving polymer thermal conductivity is essential for enhancing product reliability and functionality.

Purpose of the Study:

• To develop a novel copolymerization strategy to enhance the thermal conductivity of polyimide (PI).
• To investigate the manipulation of intrachain and interchain hopping for improved thermal transport.
• To assess the thermal stability and potential applications of the modified PI films.

Main Methods:

• A copolymerization strategy was employed to synthesize linear polyimide (PI) copolymers.
• A specific anthraquinone derivative, 2,4,5,7-tetraamino-1,8-dihydroxyanthracene-9,10-dione, was introduced at 10% concentration.
• The thermal conductivity and thermal stability of the resulting copolymerized PI films were evaluated.

Main Results:

• The copolymerization strategy increased the thermal conductivity of polyimide (PI) by three times compared to pure PI.
• This enhancement was achieved at a low introduction level (10%) of the anthraquinone derivative.
• The large-scale copolymerized PI films demonstrated excellent thermal stability after annealing.

Conclusions:

• The developed copolymerization method effectively enhances the thermal conductivity of polyimide (PI).
• This approach offers a viable route for creating advanced polymer materials for thermal management.
• The findings suggest potential for future synthesis of interfacial thermal materials using this copolymerization technique.