Packing effect on latex film formation and dissolution; a UV-Visible study


Pekcan O., Arda E.

2nd International Conference on Subsurface Sensing Technologies and Applications, California, Amerika Birleşik Devletleri, 31 Temmuz - 03 Ağustos 2000, cilt.4129, ss.314-321 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 4129
  • Doi Numarası: 10.1117/12.390628
  • Basıldığı Şehir: California
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.314-321
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Films with various thicknesses were formed from pyrene (P) labeled poly (methyl methacrylate) (PMMA) high T-g latex particles, sterically stabilized by poly isobutylene (PIB). Annealing of films were performed above T-g at elevated temperatures up to 270 degreesC for 30 min time intervals. UV-Visible (UVV) technique was used for monitoring of film formation and dissolution. Absorption of chloroform molecules into the annealed latex film was followed by diffusion of PMMA chains into solvent reservoir. Diffusion coefficients of PMMA chains were measured and found to be in between 2.6x10(-9) cm(2) s(-1) to 9.7x10(-13) cm(2) s(-1) for the latex films in various thicknesses. It was observed that thicker films dissolved much faster than the thinner films.