Abstract
The anionic ring-opening polymerization of 3-ethyl-3-hydroxymethyloxetane (EHMO) was examined using t-BuOK as a base in the presence of 18-crown-6-ether in NMP at 180℃ for 3h, affording corresponding hyperbranched polyether poly(EHMO) containing an oxetanyl group and many hydoxyl groups as terminal groups. The synthesis of poly(EHMO) derivative [poly(EHMO)-AC] with acetyl groups was examined and its cationic copolymerization with 1,4-bis[(3-ethyl-3- oxetanyl)methoxy]benzene (BEOMB) was performed. As the result, the corresponding soluble hyperbranched polyether poly[poly(EHMO)-AC-co-BEOMB](Mn = 14,300, Mw/Mn = 2.28) could be obtained. Furthermore, poly[poly(EHMO)-AC co-BEOMB] derivative with pendant methacryloyl groups {poly[poly(EHMO)- co-BEOMB)-MA} was synthesized and its physical property and photo-chemical cross-linking property were examined.
