Cao Zhiqiang and Xu Xi(Polymer Research Institute, Chengdu University of Science and Technology). Ultrasonic Degradation and Copolymerizationof Polyvinyl Acetate with PartiallyHydrolyzed Polyacrylamide[J]. CIESC Journal, 1985, (1).
Cao Zhiqiang and Xu Xi(Polymer Research Institute, Chengdu University of Science and Technology). Ultrasonic Degradation and Copolymerizationof Polyvinyl Acetate with PartiallyHydrolyzed Polyacrylamide[J]. CIESC Journal, 1985, (1).DOI:
The ultrasonic degradation and copolymerization of polyvinyl acetate (PVAc) with partially hydrolyzed polyacrylamide (HPAM) in ethanol/water (55/45) have been studied. The experimental results showed that the rate of degradation of PVAc follows Ovenalls equation approximately and that of HPAM deviates from the equation. The effects of the ultrasonic intensity and reaction temperature on the rates of degradation are the same. By irradiating 0.50% PVAc/HPAM (1/1 by weight) at 25℃ by ultrasound of 18.2 kHz with 2.4 A imput current on reversed main circuit for a period of 10 min
the yield of copolymer amounted to 4.3%. Its structure was identified by means of solubility test
IR
NMR
element analysis
electron microscope and phase contrast microscope
and the copolymer was proved to be mainly a block one.