Gelation in free-radical crosslinking copolymerization; fast transient fluorescence study
The fast transient fluorescence (FTRF) technique was used to study the sol-gel phase transition in free-radical crosslinking copolymerization (FCC) in two different monomeric systems. Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. The fluorescence lifetimes...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2002-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X02000181 |
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| Summary: | The fast transient fluorescence (FTRF) technique was used to study the sol-gel phase transition
in free-radical crosslinking copolymerization (FCC) in two different monomeric systems. Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. The fluorescence lifetimes of Py
from its decay traces were measured and used to monitor the gelation process. Monomer consumption
profiles were determined during gelation process using Stern-Volmer model. Gelations were performed at
various temperatures and in various crosslinker contents. Composite rate constants, kr were determined
and gelation activation energies, ΔEG were measured. |
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| ISSN: | 1110-662X |