Universal behaviour of gel formation from acrylamide-carrageenan mixture around the gel point: A fluorescence study
Yükleniyor...
Dosyalar
Tarih
2006-08
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Group
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The steady state fluorescence (SSF) technique was used to study the sol-gel transition, for the solution free radical crosslinking copolymerization of acrylamide (AAm) with various carrageenan content. N, N'- methylenebis (acrylamide) (BIS) and ammonium persulfate (APS) are used as crosslinker and an initiator, respectively. Pyranine (8-hydroxypyrene-1, 3,6-trisuffonic acid, trisodium salt, HPTS) was added as a floroprobe for monitoring the polymerization. Pyranine molecules start to bind to acrylamide polymer chains upon the initiation of the polymerization; thus, the spectra of the bonded pyranines shift to the shorter wavelengths. Fluorescence spectra from the bonded pyranines allows one to monitor the sol-gel transition, without disturbing the system mechanically, and to test the universality of the sol-gel transition as a function of some kinetic parameters like polymer concentration. Observations around the critical point show that the gel fraction exponent P obeyed the percolation result for low carrageenan concentrations (< 2.0%) however classical results were produced at higher carrageenan concentration (> 2.0%).
Açıklama
Anahtar Kelimeler
Acrylamide-carrageenan mixture, Gel point, Critical phenomena, Fluorescence, Molecular-size distribution, Cross-linking copolymerization, Photon transmission technique, 3-dimensional polymers, Real-time, Methyl-methacrylate, Branched polymers, Probes, Polymerization, Transition
Kaynak
Journal of Biomolecular Structure and Dynamics
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
41
Sayı
1
Künye
Pekcan, M. Ö., Kaya Aktaş, D. & Evingür, G. (2006). Universal behaviour of gel formation from acrylamide-carrageenan mixture around the gel point: A fluorescence study. Journal of Biomolecular Structure and Dynamics, 24(1), 83-90. doi:10.1080/07391102.2006.10507102
