Reference of 1-(tert-Butyl)-1H-pyrrole-2,5-dione. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione, is researched, Molecular C8H11NO2, CAS is 4144-22-3, about Reactivity ratios in copolymerization of vinyl chloride and N-substituted maleimide and copolymer composition. Author is Du, Miao; Weng, Zhi-Xue; Shan, Guo-Rong; Huang, Zhi-Ming; Pan, Zu-Ren.
Radical copolymerization of vinyl chloride (VC) with N-substituted maleimide were conducted in THF at 60° with AIBN as initiator. Based on the copolymer composition and monomer composition, the copolymerization parameters (r1, r2, Q and e) of each monomer pair were determined The reactivity ratios of N-substituted maleimide monomers were all larger than that of VC, indicating that these monomers were more active. The effects of substituted groups on reactivity ratios were also discussed, and N-substituted maleimide monomer had a larger Q value than that of VC, especially for Ph substituted maleimide monomer. It was believed that this phenomenon was related to the conjugated effect of Ph group in N-substituted maleimide. The location of substituent on Ph would influence Q value of N-substituted Ph maleimide monomer. Para-substituent Ph maleimide has a large Q value than that of ortho- and meta-substituted Ph maleimides. In addition, there is a larger difference between e1 and e2, which means the large alternating tendency of the copolymerization of N-substituted maleimide with VC. The copolymer compositions for VC/N-substituted maleimide solution copolymerization varied greatly with conversion, especially for small N-substituted maleimide feed ratios. Subsequently, recurrence method deduced from Mayo-Lewis was used for predicting the change of copolymer composition with conversion. In addition, this method is also used to calculate the critical weight [(χw)c] conversion for VC/N-substituted maleimide copolymerization systems at different VC monomer feed fractions.
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Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics