| 초록 |
The condensation of a mixture of dimethyl carbonate and the phthalate derivatives with 1,4-butanediol(BD), using a sodium alkoxide catalyst, generated high-molecule-weight poly(1,4-butylene carbonate-co-aromatic ester)s with Mn values of 50000-120000. The subsequent addition of polyols(BD, glyserol prpoxylate, 1,1,1-tris(hydroxymethyl)ethane, or pentaerythritol) chopped the generated high-molecular-weight polymers to afford macrodiols or macropolyols with facile control of their molecular weight (Mn, 2000-3000) and unique chain topological composition. Macropolyols prepared by chopping poly(1,4-butylene carbonate-co-terephthalate) were waxy in nature, whreras those containing isophthalate and phthalate units were instead oily. The macropolyols synthesized by this chopping method may have potential applications in the polyurethane industry. |
