【摘要】 含有β二酮结构的烯类单体，如丙烯酰丙酮，分子中的β二酮部分存在着酮式烯醇式的互变异构现象［１～３］，张亦帆等对此进行了详细的研究［４］．ＣＨ２ＣＨＣＯＣＨ２ＣＯＣＨ３ＣＨ２ＣＨＣＯＨＯＣＨＣＣＨ３ＣＨ２ＣＨＣＯＨＯＣＨＣＣＨ３此类单体不同于一般...更多还原

【Abstract】 An acrylic monomer having diketonic moiety,i.e.3\|acetyl\|5\|methyl\|5\|hexene\|2,4\|diketone(AMAA) was synthesized by reaction of acetylacetone and methacrylyl chloride in the presence of magnesium ethoxide.It has been found that AMAA is difficult to polymerize by free\|radical initiation or heating due to the enol formating of diketonic moiety in the monomer.After the protection of the enol form in AMAA by treatment with trimethylsilyl chloride,the free\|radical polymerization of AMAA can take place smoothly. The trimethylsilyl group can be removed easily by alcoholysis.It has been revealed by ESR analysis that the carbon atom which connected three strongly electron negative carbonyl groups in AMAA molecule forming a stable carbon free radical lead to retard the propagation during the free\|radical polymerization.\=更多还原