1. Basic Information on Nonsubstituted Polyphenylene and Polythiophene Obtained via Solubilization of Polymers
- Author
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Biyao Wu, Takakazu Yamamoto, Masahiro Abe, † Byoung-Ki Choi, Yasuo Takahashi, Kentaro Kawata, Kenji Kubota, Yosuke Harada, and and Shintaro Sasaki
- Subjects
chemistry.chemical_classification ,Condensation polymer ,Polymers and Plastics ,Organic Chemistry ,Polymer ,Inorganic Chemistry ,Gel permeation chromatography ,chemistry.chemical_compound ,chemistry ,Polymerization ,Nitration ,Polymer chemistry ,Materials Chemistry ,Copolymer ,Polythiophene ,Benzene - Abstract
Basic information on the molecular weights and structures of poly(p-phenylene) PPP, poly(m-phenylene) PMP, poly(thiophene-2,5-diyl) PTh, and related copolymers has been obtained. PPPs prepared by a Ni-catalyzed dehalogenative polycondensation of p-C6H4Br2 with Mg (PPP(Ni)) and an oxidative polymerization of benzene using CuCl2 (PPP(Cu)) became soluble in DMF after nitration. The nitration proceeded essentially without crosslinking, and GPC analysis gave Mn values of 8300 and 6100 for nitrated PPP(Ni) and PPP(Cu), respectively. Light scattering analysis indicated that nitrated PPP(Ni) and PPP(Cu) assumed a rather stiff structure in DMF with ρv (degree of depolarization) in the range of 0.12−0.13. PMP and PTh also became soluble in DMF after nitration, and GPC analysis of nitrated PMP and PTh gave Mn values of 5500 and 8500, respectively. Light scattering analysis of nitrated PTh gave a ρv of 0.33, which indicated that the polymer had a stiff structure in DMF. Copolymers of p-phenylene (PP) and m-phenylene ...
- Published
- 2007