膦腈碱催化羟基与双键的Michael加成聚合反应.

Linear polyester ether was prepared at room temperature by Michael polymerization of hydroxyl and double bond using phosphazene-bases as catalyst, 2-methyl-1,3-propanediol and diacrylate as monomers. The effects of catalyst type, catalyst concentration, feed ratio of monomer and monomer type of double bond on polymerization reaction were investigated. The polymer structure and polymer reaction mechanism were studied by fourier transform-infrared spectroscopy（FT-IR） and nuclear magnetic resonance（NMR）, and the molecular weight and molecular weight distribution of the prepared polymers were characterized by size-exclusion chromatography（SEC）. The results show that the relatively higher molecular weight of polymer was prepared by phosphazene-bases t-BuP2 with appropriate concentration. In addition, increasing the carbon chain length of double bond monomer or improving the molar ratio of diacrylate to alcohol hydroxyl monomer can reduce the interesterification side reaction, and obtain higher molecular weight linear polymers. [ABSTRACT FROM AUTHOR]