2-丁基-7-亚甲基-1,4,6-三氧螺[4,4]壬烷的合成及聚合反应

SYNTHESIS AND POLYMERIZATION OF 2-BUTYL-7-M THYLENE-1, 4,6-TRIOXASPIRO [4,4] NONANE

本文以2-溴甲基-5-氧-四氢呋喃和1,2-环氧乙烷反应,得到的7-溴甲基-2-丁基-1,4,6-三氧螺[4,4]壬烷③为原料,经脱氢溴化作用制得了2-丁基-7-亚甲基-1,4,6-三氧螺[4,4]壬烷⑤。将其为单体进行均聚反应,得到一粘稠聚合物。通过对该合聚物的IR和NMR谱图分析,得知该聚合物含有酯基和酮基的结构单元,以及环缩醛的侧链。本文还提出了链增长的机理。

2-Butyl-7-methylene-1,4,6-trioxaspiro (4,4) uonane (5) was prepared by the reaction of 2-bromomethyl- 5 -oxo-tetrahydrofuran with 1,2-epoxyhexane, followed by dehydrobromina-tion.Compound (5) could be polymerized by free radical initiators to give a viscous polymer. The IR and NMR spectra of the polymers indicated that the polymer structure contained ester and ketone units in the backbone, and a cyclic acetals as side chain. A propagation mechanism was discussed.