In situ fluorescence study of slow release and swelling processes in gels formed by solution free radical copolymerization

Ö Pekcan; Y. Yilmaz; Ş Uǧur

doi:10.1002/(SICI)1097-0126(199712)44:4<474::AID-PI843>3.0.CO;2-N

In situ fluorescence study of slow release and swelling processes in gels formed by solution free radical copolymerization

Ö Pekcan^*, Y. Yilmaz, Ş Uǧur

^*Corresponding author for this work

Department of Physics Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A novel method based on steady state fluorescence (SSF) measurements is introduced for studying slow release and swelling processes in gels formed by free radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in toluene. Gels were prepared at 75°C with various toluene contents with pyrene (P_y) as a fluorescence probe. After drying these gels, slow release and swelling experiments were performed in toluene at 50°C by real-time monitoring of the pyrene fluorescence intensity. Li-Tanaka and Fickian type equations were used to obtain swelling and slow release parameters. It was observed that slow release takes place after the gel is swollen. Cooperative and desorption (slow release) diffusion coefficients (D_c and D) were measured and found to be 10^-6 cm² s^-1 in both cases.

Original language	English
Pages (from-to)	474-480
Number of pages	7
Journal	Polymer International
Volume	44
Issue number	4
DOIs	https://doi.org/10.1002/(SICI)1097-0126(199712)44:4<474::AID-PI843>3.0.CO;2-N
Publication status	Published - 1997

Keywords

Cooperative diffusion
Fluorescence
Gels
Slow release
Swelling

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10.1002/(SICI)1097-0126(199712)44:4<474::AID-PI843>3.0.CO;2-N

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title = "In situ fluorescence study of slow release and swelling processes in gels formed by solution free radical copolymerization",

abstract = "A novel method based on steady state fluorescence (SSF) measurements is introduced for studying slow release and swelling processes in gels formed by free radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in toluene. Gels were prepared at 75°C with various toluene contents with pyrene (Py) as a fluorescence probe. After drying these gels, slow release and swelling experiments were performed in toluene at 50°C by real-time monitoring of the pyrene fluorescence intensity. Li-Tanaka and Fickian type equations were used to obtain swelling and slow release parameters. It was observed that slow release takes place after the gel is swollen. Cooperative and desorption (slow release) diffusion coefficients (Dc and D) were measured and found to be 10-6 cm2 s-1 in both cases.",

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T1 - In situ fluorescence study of slow release and swelling processes in gels formed by solution free radical copolymerization

AU - Pekcan, Ö

AU - Yilmaz, Y.

AU - Uǧur, Ş

PY - 1997

Y1 - 1997

N2 - A novel method based on steady state fluorescence (SSF) measurements is introduced for studying slow release and swelling processes in gels formed by free radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in toluene. Gels were prepared at 75°C with various toluene contents with pyrene (Py) as a fluorescence probe. After drying these gels, slow release and swelling experiments were performed in toluene at 50°C by real-time monitoring of the pyrene fluorescence intensity. Li-Tanaka and Fickian type equations were used to obtain swelling and slow release parameters. It was observed that slow release takes place after the gel is swollen. Cooperative and desorption (slow release) diffusion coefficients (Dc and D) were measured and found to be 10-6 cm2 s-1 in both cases.

AB - A novel method based on steady state fluorescence (SSF) measurements is introduced for studying slow release and swelling processes in gels formed by free radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in toluene. Gels were prepared at 75°C with various toluene contents with pyrene (Py) as a fluorescence probe. After drying these gels, slow release and swelling experiments were performed in toluene at 50°C by real-time monitoring of the pyrene fluorescence intensity. Li-Tanaka and Fickian type equations were used to obtain swelling and slow release parameters. It was observed that slow release takes place after the gel is swollen. Cooperative and desorption (slow release) diffusion coefficients (Dc and D) were measured and found to be 10-6 cm2 s-1 in both cases.

KW - Cooperative diffusion

KW - Fluorescence

KW - Gels

KW - Slow release

KW - Swelling

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U2 - 10.1002/(SICI)1097-0126(199712)44:4<474::AID-PI843>3.0.CO;2-N

DO - 10.1002/(SICI)1097-0126(199712)44:4<474::AID-PI843>3.0.CO;2-N

M3 - Article

AN - SCOPUS:0031373696

SN - 0959-8103

VL - 44

SP - 474

EP - 480

JO - Polymer International

JF - Polymer International

IS - 4

ER -

In situ fluorescence study of slow release and swelling processes in gels formed by solution free radical copolymerization

Abstract

Keywords

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