Film formation from pure and mixed latices; transient fluorescence study
Yükleniyor...
Dosyalar
Tarih
2005-11-15
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Academic Press Inc Elsevier Science
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A fast transient fluorescence technique was used to study latex film formation induced by organic solvent vapor. Mixtures of pyrene (P)- and naphthalene (N)-labeled and/or pure naphthalene-labeled latex films were prepared separately from poly(methyl methacrylate) (PMMA) particles. Then these pure and mixed latex films were exposed to vapor of various chloroform-heptane mixtures in seven different experiments. In both films, fluorescence lifetimes from N were monitored during vapor-induced film formation. It was observed that N lifetimes decreased as the vapor exposure time is increased. A Stern-Volmer kinetic analysis was used for low quenching efficiencies to interpret the decrease in N lifetimes. A Prager-Tirrell model was employed to obtain back-and-forth frequencies, v, of reptating PMMA chains during latex film formation induced by solvent vapor. In both pure and mixed latex films, v values were found to be correlated with the chloroform content in the vapor mixture. It was observed that polymer interdiffusion obeyed a t(1/2) law during film formation.
Açıklama
Anahtar Kelimeler
T latex-particles, Polymer-polymer interface, Energy-transfer, Molecular-weight, Colloids, Interdiffusion, Diffusion, Dispersions, Luminescence, Photon transmission, Aromatic compounds, Crystal lattices, Fluorescence, Latexes, Mixtures, Organic solvents, Polymethyl methacrylates, Chlorine compounds, Esters, Naphthalene, Fast transient fluorescence techniques, Fluorescence lifetimes, Fluorescence studies, Kinetic analysis, Latex film formations, Organic solvent vapors, Poly(methyl methacrylate) (PMMA), Quenching efficiency, Chloroform, Heptane, Latex, Poly(methyl methacrylate), Polymer, Pyrene, Analytic method, Chemical labeling, correlation analysis, Diffusion, Experiment, Exposure, Film, Kinetics, Mathematical model, Monitoring, Photochemical efficiency, Photochemical quenching, Priority journal, Vapor, Latex films, Vapor mixtures, Film preparation
Kaynak
Journal of Colloid and Interface Science
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
291
Sayı
2
Künye
Uğur, Ş. & Pekcan, M. Ö. (2005). Film formation from pure and mixed latices; transient fluorescence study. Journal of Colloid and Interface Science, 291(2), 405-410. doi:10.1016/j.jcis.2005.05.015
