Reversible film formation from PS doped PNIPAM particles in various compositions

Creative Commons License

Uğur Ş., Yargi Ö., Pekcan O.

POLYMER COMPOSITES, cilt.29, ss.179-186, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1002/pc.20378
  • Dergi Adı: POLYMER COMPOSITES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.179-186
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Film formation from polystyrene (PS) doped poly(N-isopropylacrylamide) (PNIPAM) particles was studied using photon transmission technique. The transmitted light intensity, I-tr, was monitored during film formation process. Films were prepared by mixing PS and PNIPAM particles in various compositions ranging from 5 to 50%. Samples were separately heated and cooled in constant rate at temperatures ranging from 10 to 100 degrees C. The increase and decrease in I-tr during heating-cooling cycles were explained by void closure and void reconstruction processes. The corresponding activation energies were measured during the reversible film formation process. Percolation model was used to interpret the distribution of PS particles in PNIPAM lattice.