Film formation from pure and mixed latices; transient fluorescence study

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Küçük Resim

Tarih

2005-11-15

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Academic Press Inc Elsevier Science

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Araştırma projeleri

Organizasyon Birimleri

Dergi sayısı

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
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