STUDY ON POLYMERIZATION OF ACRYLONITRILE INITIATED BY SODIUM NITRITE
亚硝酸钠引发丙烯腈聚合的研究

The polymerization of acrylonitrile in aqueous nitric acid solution with sodium nitrite as initiator has been studied. The rate of polymerization can be expressed by following equation:Rp = Ae10.800/RT AN]2.3 NaNO2]0.17-1.0HNO3]1.0-0.67In the copolymerization of acrylonitrile and methyl acrylate, the reactivity ratios was found to be 0.96 and 1.17, respectively, indicating a free radical mechanism.According to the results of polymerization kinetics and infra-red analysis, it is suggested that the initiation mechanism of acrylon trile in aqueous nitric acid solution by sodium nitrite is analogous to thesecondary initiation by electrolysis or corrosion of metals.