What does this research mean for the field?

Optimizing the hollow-silica-to-nano-silica ratio to 75:25 in polyimide composites balances processability, mechanical reliability, thermal stability, and high-frequency dielectric performance, whereas excessive nano-silica loading degrades these properties. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To establish the processing–structure–property relationships of hybrid silica-filled polyimide composites by identifying the ideal hollow-silica-to-nano-silica ratio for high-frequency copper-clad laminates.

September 5, 2026Polymer Engineering and Science

Optimization of Hybrid Silica Composition in Polyimide Composite Films for Balanced Processability and High‐Frequency Dielectric Performance

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Authors

SKSang O. Kim JLJae Myeong Lee SCSuin Chae

Discussion

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Overview

Experimental study demonstrates an optimal 75:25 hollow-to-nano silica ratio balances processability and dielectric reliability in polyimide films, indicating viability for high-frequency electronics.

Key Points

To establish the processing–structure–property relationships of hybrid silica-filled polyimide composites by identifying the ideal hollow-silica-to-nano-silica ratio for high-frequency copper-clad laminates.
Fabricated polyimide composite films by systematically altering the hollow-silica-to-nano-silica ratio while keeping total silica content constant.
Characterized composite rheology, film-forming flow, Martens hardness, tensile strength, and coefficient of thermal expansion.
Evaluated high-frequency dielectric constant, dielectric loss, and transmission stability after environmental aging at 85°C and 85% relative humidity for 96 hours.
An intermediate 75:25 hollow-silica-to-nano-silica ratio (Sample #2) yielded optimal flow and leveling while decreasing the coefficient of thermal expansion by 20.1% from 202.4 to 161.7 ppm/°C.
Sample #2 achieved the highest Martens hardness along with peak B-stage tensile strength and elongation, while exhibiting minimal shifts in dielectric constant and dielectric loss after 96 hours of environmental aging.
Excessive nano-silica content generated an overly rigid filler network that hindered resin leveling, increased film surface roughness, and caused greater dielectric and mechanical degradation.

Cite This Study

Kim et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4346b95aff0620eba35 https://doi.org/10.1002/pen.70855

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September 5, 2026Polymer Engineering and Science

Optimization of Hybrid Silica Composition in Polyimide Composite Films for Balanced Processability and High‐Frequency Dielectric Performance

View Full Paper

Ask AI

Bookmark

Authors

SKSang O. Kim JLJae Myeong Lee SCSuin Chae

Discussion

Member takes

Overview

Key Points

To establish the processing–structure–property relationships of hybrid silica-filled polyimide composites by identifying the ideal hollow-silica-to-nano-silica ratio for high-frequency copper-clad laminates.
Fabricated polyimide composite films by systematically altering the hollow-silica-to-nano-silica ratio while keeping total silica content constant.
Characterized composite rheology, film-forming flow, Martens hardness, tensile strength, and coefficient of thermal expansion.
Evaluated high-frequency dielectric constant, dielectric loss, and transmission stability after environmental aging at 85°C and 85% relative humidity for 96 hours.
An intermediate 75:25 hollow-silica-to-nano-silica ratio (Sample #2) yielded optimal flow and leveling while decreasing the coefficient of thermal expansion by 20.1% from 202.4 to 161.7 ppm/°C.
Sample #2 achieved the highest Martens hardness along with peak B-stage tensile strength and elongation, while exhibiting minimal shifts in dielectric constant and dielectric loss after 96 hours of environmental aging.
Excessive nano-silica content generated an overly rigid filler network that hindered resin leveling, increased film surface roughness, and caused greater dielectric and mechanical degradation.

Cite This Study

Kim et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4346b95aff0620eba35 https://doi.org/10.1002/pen.70855

View Full Paper

Ask AI

Bookmark