Surface mechanical properties of poly(urethane acrylate)/silica hybrid interpenetrating polymer network (IPN) coatings

Min Seop Um, Dong Seok Ham, Seong Keun Cho, Sang Jin Lee, Kwang Je Kim, Jae Heung Lee, Sung Hoon Choa, Hyun Wook Jung, Woo Jin Choi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Surface mechanical properties of poly(urethane acrylate) (PUA)/silica hybrid interpenetrating polymer network (IPN) coating materials were investigated using several test methods including nano-indentation, nano-scratch, pencil hardness, and stretching. To prepare coated films, an organic part (urethane acrylate) was mixed with an inorganic part (silica) at various ratios. Independent crosslinking reactions were applied to form the hybrid IPN structure: UV curing and sol-gel reactions were used for the organic and inorganic parts, respectively. The prepared hybrid IPN coatings exhibited no macroscopic phase separation. As the silica content was increased, the values for indentation hardness and pencil hardness increased, while failure strain during stretching test decreased. It was found that the hybrid IPN coating with its balanced dissipative and elastic properties had better scratch resistance than that of other coatings.

Original languageEnglish
Pages (from-to)166-174
Number of pages9
JournalProgress in Organic Coatings
Publication statusPublished - 2016 Aug


  • Dissipative and elastic energy ratios
  • Failure strain during stretching test
  • Hard coating film
  • Nano-indentation test
  • Nano-scratch test
  • Pencil hardness test

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Surfaces, Coatings and Films
  • Organic Chemistry
  • Materials Chemistry


Dive into the research topics of 'Surface mechanical properties of poly(urethane acrylate)/silica hybrid interpenetrating polymer network (IPN) coatings'. Together they form a unique fingerprint.

Cite this