Structure and properties of poly(n-vinylcarbazole) obtained via asymmetrically stereoselective polymerization

摘要

The structure and properties of poly(N-vinylcarbazole) (PVCZ) obtained via asymmetrically stereoselective polymerization have been studied by using HNMR spectra, UV spectra, DSC analysis and GPC. The steric microstructure i.e. The content of isotactic sequences was found to be increase by using AIBN to (-) Sp~+(+) CSA~ -as the initiators or catalysts and the mole extinction coefficient to be decreased. Bimodal molecular weight distribution (MWD)s of the obtained PVCZs were caused by two propa- gating species of the free ions and the ion-pairs associated with the organic salts during polymerization.