【摘要】 本文研究了溶剂对4-甲基丙烯酸-2,2,6,6-四甲基哌啶醇酯(TMPM)与苯乙烯(St)自由基共聚的影响。其共聚活性与TMPM在不同溶剂中β-C上质子化学位移差(ΔδH)之间存在着较好的线性关系。更多还原

【Abstract】 The radical copolymerization of 2, 2, 6, 6-tetramethyl-4-piperidinyl methacrylate (TMPM) with styrene has been studied in various solvents: benzene, chlorobenzene, pyridine, dimethyl formamide and petroleum ether. The reactivity ratios were calculated by the linear graphical method of Kelen-Tudos. It is observed that in all these systems there is a marked solvent effect on both r1 and r2, which can be correlated to the difference in chemical shifts of β-olefinic protons of TMPM.更多还原