The principle and calculation equation of composition distribution measurement for vinyls/ N phenylmaleimide(PMI) copolymer were presented using the information of differential refractometer (DR) and ultraviolet spect...The principle and calculation equation of composition distribution measurement for vinyls/ N phenylmaleimide(PMI) copolymer were presented using the information of differential refractometer (DR) and ultraviolet spectrophotometer(UV) detectors connected with the gel permeation chromatography(GPC). With the information of DR and UV detectors, the effects of copolymerization methods and process on the composition distributions of styrene PMI, methyl methacrylate PMI and vinyl chloride PMI copolymers systems were studied. It was found that the composition distribution of copolymer was even at low conversion, but changed with the increasing of conversion. [WT5HZ]展开更多
After studying the measurement method of peroxide concentration by iodometry, the decomposition kinetics of five types of peroxides were investigated in detail. On the basis of the additive property for rate, a decomp...After studying the measurement method of peroxide concentration by iodometry, the decomposition kinetics of five types of peroxides were investigated in detail. On the basis of the additive property for rate, a decomposition kinetic model of peroxide mixtured initiator has been deduced. The model values of decomposition rate constant coincided with the experimental data. The kinetic behavior of the vinyl chloride suspension polymerization with peroxide mixture as initiators can be predicated by using the model of decomposition rate constant of peroxide mixture and simulating the model of vinyl chloride polymerization.展开更多
文摘The principle and calculation equation of composition distribution measurement for vinyls/ N phenylmaleimide(PMI) copolymer were presented using the information of differential refractometer (DR) and ultraviolet spectrophotometer(UV) detectors connected with the gel permeation chromatography(GPC). With the information of DR and UV detectors, the effects of copolymerization methods and process on the composition distributions of styrene PMI, methyl methacrylate PMI and vinyl chloride PMI copolymers systems were studied. It was found that the composition distribution of copolymer was even at low conversion, but changed with the increasing of conversion. [WT5HZ]
文摘After studying the measurement method of peroxide concentration by iodometry, the decomposition kinetics of five types of peroxides were investigated in detail. On the basis of the additive property for rate, a decomposition kinetic model of peroxide mixtured initiator has been deduced. The model values of decomposition rate constant coincided with the experimental data. The kinetic behavior of the vinyl chloride suspension polymerization with peroxide mixture as initiators can be predicated by using the model of decomposition rate constant of peroxide mixture and simulating the model of vinyl chloride polymerization.
