Effects of annealing on morphology of polymer/polymer (PS/PMMA) blend; a fluorescence study

✍ Scribed by şaziye Uğur; önder Pekcan

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 277 KB
• Volume: 100
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.23458

✦ Synopsis

Abstract

Steady state fluorescence (SSF) technique conjunction with optical microscopy were used to study the morphology of polystyrene (PS)/poly(methyl methacrylate) (PMMA) blend upon annealing above glass transition in elevated time intervals. The PS/PMMA blends were prepared from dissolution of pyrene (P) and naphthalene (N) labeled PS and PMMA particles, respectively. Monte Carlo simulations were performed to model the N and P fluorescence intensities (I~N~ and I~P~), using photon diffusion theory. Number of N and P photons (N~N~ and N~P~) emerging from the front surface of the blend are calculated when only N is excited, where N~P~ photons are combined of photons from radiative (N~PR~) and nonradiative (N~PNR~) energy transfer processes. Optical microscopy images were taken at each annealing step to support our findings from fluorescence measurements. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2104–2110, 2006