| 초록 |
It is well known that vinyl ethers such as tert-butyl vinyl ether (tBVE) has been studied as starting monomer to obtain stereoregular poly(vinyl alcohol) (PVA). We investigated polymerization of poly(tBVE) at various polymerization temperatures, solvents, catalyst concentrations. Polymer yield is highly influenced by temperature of polymerization. The largest amount of the polymer was obtained at -30 ℃. When yield of poly(tBVE) was increased, molecular weight and molecular weight distribution was decreased. It is supposed that because of unstability of propagating species in cationic polymerization occurs chain transfer, termination and other side reaction. |
