Choi, DC Kim, SH Lee, JH Cho, HN Choi, SK 2024-01-21T18:40:56Z 2024-01-21T18:40:56Z 2022-01-10 1997-01-27 0024-9297 https://pubs.kist.re.kr/handle/201004/143978 A new type of conjugated ionic polyacetylene was synthesized by metathesis polymerization of betaine monomers, alkyldipropargyl(4-sulfobutyl)ammonium betaines (ADPSAB). The alkyl groups used are ethyl, n-butyl, n-hexyl, and n-octyl. The polymerization of ADPSAB was carried out with various transition metal catalyst systems such as MoCl5-, WCl6-, and PdCl2-based catalyst systems. The MoCl5 and PdCl2 were found to be particularly effective catalysts for the cyclopolymerization of the betaine monomers. H-1-NMR, C-13-NMR, IR, and UV-visible spectroscopies showed that poly(ADPSAB) possess polyene structure having cyclic recurring units in the polymer backbone. Unlike polyelectrolyte, the resulting polymers were more soluble and showed higher viscosities in the salt solution than in salt-free solution (antipolyelectrolytes). When doped with an acceptor such as iodine, the polymers exhibited a substantial increase (similar to 10(-3) S/cm) in electrical conductivity compared to the undoped state (similar to 10(-10) S/cm). English AMER CHEMICAL SOC METATHESIS CATALYSTS CARBAZOLE MOIETY POLYMERIZATION POLY(1,6-HEPTADIYNE) POLYMERS DIPROPARGYLMALONATE CONDUCTIVITY POLYPYRROLE BLENDS SALTS A new class of conjugated ionic polyacetylenes .3. Cyclopolymerization of alkyldipropargyl(4-sulfobutyl)ammonium betaines by transition metal catalysts Article 10.1021/ma951749a 1 MACROMOLECULES, v.30, no.2, pp.176 - 181 MACROMOLECULES 30 2 176 181 scie scopus A1997WF22900003 2-s2.0-0030825016 Polymer Science Polymer Science Article METATHESIS CATALYSTS CARBAZOLE MOIETY POLYMERIZATION POLY(1,6-HEPTADIYNE) POLYMERS DIPROPARGYLMALONATE CONDUCTIVITY POLYPYRROLE BLENDS SALTS polyacetylenes cyclopolymerization betaines