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Sol—Gel Transition Induced by Friedel—Crafts Crosslinking of Polystyrene Solutions
Abstract Friedel—Crafts crosslinking of polystyrene has been performed with 9,10-dichloromethylanthracene (A(MC)2) in 1,2-dichloroethane solution. The extent of the reaction is followed by UV spectroscopy. The number of crosslinks is a strongly non-linear function of the reaction time. We found that the variation of properties of the sol molecule distribution such as weight, average molecular weight and average radius of gyration and the viscosity near the gel point depend on kinetics. We performed a computer simulation of the kinetics of the reaction which may explain this observation. The number of crosslinks necessary to form a gel depends on the concentration and molecular weight of precursor chains. Beyond the gel point the existence of intramolecular crosslinks has been demonstrated by analyses of elastic moduli and swelling equilibrium concentrations.
Sol—Gel Transition Induced by Friedel—Crafts Crosslinking of Polystyrene Solutions
Abstract Friedel—Crafts crosslinking of polystyrene has been performed with 9,10-dichloromethylanthracene (A(MC)2) in 1,2-dichloroethane solution. The extent of the reaction is followed by UV spectroscopy. The number of crosslinks is a strongly non-linear function of the reaction time. We found that the variation of properties of the sol molecule distribution such as weight, average molecular weight and average radius of gyration and the viscosity near the gel point depend on kinetics. We performed a computer simulation of the kinetics of the reaction which may explain this observation. The number of crosslinks necessary to form a gel depends on the concentration and molecular weight of precursor chains. Beyond the gel point the existence of intramolecular crosslinks has been demonstrated by analyses of elastic moduli and swelling equilibrium concentrations.
Sol—Gel Transition Induced by Friedel—Crafts Crosslinking of Polystyrene Solutions
Collette, C. (author) / Lafuma, F. (author) / Audebert, R. (author) / Leibler, L. (author)
1988-01-01
14 pages
Article/Chapter (Book)
Electronic Resource
English
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