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


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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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