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The ultrasonic degradation of poly(ethylene oxide) and poly(vinyl acetate) in benzene solution, and grafting reaction of poly(vinyl acetate) with poly(ethylene oxide) were studied. It is found that the chain-scission reactions follow the course suggested by D. W. Ovenall. The structure of the copolymer was identified by IR, NMR and DTA, showing that the copolymer prepared is a graft copolymer mainly. The copolymer formed by irradiating 1% PEO/PVAc solution (PEO/PVAc:1/1 by weight) for a period of 10 rain at 18.2 kHZ, with 2.0 A input current on reversed main circuit, amounts to 10.5%.
The ultrasonic degradation of poly (ethylene oxide) and poly (vinyl acetate) in benzene solution, and grafting reaction of poly (vinyl acetate) with poly (ethylene oxide) were studied. It is found that the chain-scission reactions follow the course suggested by DW Ovenall. The structure of the copolymer was identified by IR, NMR and DTA, showing that the copolymer prepared is a graft copolymer mainly. The copolymer formed by irradiating 1% PEO / PVAc solution (PEO / PVAc: 1/1 by weight ) for a period of 10 rain at 18.2 kHZ with 2.0 A input current on reversed circuit, amounts to 10.5%.