Tunable crystalline phases in UV-curable PEG-grafted ladder-structured silsesquioxane/polyimide composites

Ryung Il Kim, Ju Ho Shin, Jong Suk Lee, Jung Hyun Lee, Albert S. Lee, Seung Sang Hwang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A series of UV-curable hybrid composite blends containing a carboxylic acid functionalized polyimidewith varying amounts of high molecular weight (~1 K) PEG-grafted ladder-structured polysilsesquioxanes copolymerized with methacryl groups were fabricated and their structural, thermal, mechanical, and surface properties characterized. At a composite weight ratio of polyimide above 50 wt.%, a stark shift from amorphous to crystalline polyethylene glycol (PEG) phases were observed, accompanied by a drastic increase in both surface moduli and brittleness index. Moreover, fabricated composites were shown to have a wide range water contact angle, 9.8°-73.8°, attesting to the tunable surface properties of these amphiphilic hybrid polymer composites. The enhanced mechanical properties, combined with the utility of tunable surface hydrophilicity allows for the possible use of these hybrid polymer composites to be utilized as photosensitive polyimide negative photoresists for a myriad of semiconductor patterning processes.

Original languageEnglish
Article number2295
Issue number10
Publication statusPublished - 2020 May 1

Bibliographical note

Funding Information:
Funding: This work was supported by Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program funded by the Ministry of Trade, Industry and Energy, Republic of Korea [2MR8870], as well as the institutional program of the Materials Architecturing Research Center of Korea Institute of Science and Technology [2E3710].

Publisher Copyright:
© 2020 by the authors.


  • 6FDA-DAM:DABA (3:2)
  • Hybrid composite
  • Ladder-structured polysilsesquioxane
  • Polyimide

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


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