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1992 Fiscal Year Final Research Report Summary

Synthesis and Properties of Highly Aligned Polyacetylene Prepared by using Smectic Liquid Crystal as a Solvent.

Research Project

Project/Area Number 03650739
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 高分子合成
Research InstitutionInstitute of Materials Science, University of Tsukuba

Principal Investigator

AKAGI Kazuo  Univ. of Tsukuba, Inst. of Mat. Sci. Associate Professor, 物質工学系, 助教授 (20150964)

Co-Investigator(Kenkyū-buntansha) SHIRAKAWA Hideki  Univ. of Tsukuba, Inst. Mat. Sci. Professor, 物質工学系, 教授 (40016720)
Project Period (FY) 1991 – 1992
KeywordsSmectic liquid crystal / Nematic liquid crystal / Anisotropic reaction field / Polyacetylene / Alignment / Electrical conductivity / Ziegler-Natta catalyst / Solvent-free polymerization
Research Abstract

Polymerization of acetylene has been carried out under anisotropic reaction field that is generated by equi-molar mixture of two kinds of smectic liquid crystals used as solvent for Ziegler-Natta type catalyst composed of tetra-n-butoxytitanium, Ti(O-n-Bu)_4, and triethylalumium, AlEt_3. The smectic liquid crystals have a cyclohexylphenoxy moiety as a mesogenic core, and alkyl chains as terminal groups, as shown below.
As a result, we succeeded in a synthesis of as-grown directly aligned polyacetylene film in the smectic liquid crystal phase. Measurements of SEM (scanning electron microscope), however, indicated that the fibrils, bundles of polyene chains, are not uniformly aligned. Nevertheless, the microscopic alignment of fibrils enabled the iodine-doped film to attain high electrical conductivity of 1.4 x 10^4 S/cm, which is comparable to those of polyacetylene films prepared by nematic liquid crystal.
Next, we have applied the solvent-free polymerization method recently developed for synthesis of highly tensile and stretchable polyacetylene film to the present liquid crystal method, in order to prepare as-grown aligned film with mechanical stretchability. The Ti(O-n- Bu)_4-AlEt_3 catalyst was first prepared without solvent at room temperature and aged at higher temperature of 150 ゚C for 1 hour. Then to the catalyst was added an equi-molar mixture of nematic or smectic liquid crystals. The film obtained was indeed improved in fragility, but it showed no notable stretchability in spite of usage of high-temperature aged catalyst. This may be due to low concentration of the catalyst, which is an inevitable restriction to keep the liquid crystalline phase.

  • Research Products

    (44 results)

All Other

All Publications (44 results)

  • [Publications] Kazuo AKAGI: "ESR Study on Ti(OR)_4-AIR'_3 Catalyst Systems-Structural Changes of Ti^<3+> Complex upon High-Temperature Aging" Synthetic Metals. 40. 197-218 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Mechanism of Stereopecific Chlorinationof Polyene via Prolonged Chemical Doping" J.Mol.Struct.(Theochem). 232. 211-224 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideki SHIRAKAWA: "S-(CH)_X and N-(CH)_X-What is Difference?" Synthetic Metals. 41. 13-18 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yosikazu TANABE: "Kinetic Analysis of Polyacetylene" J.Polym.Sci.,Part B, Poym.Phys.29. 501-507 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideki SHIRAKAWA: "Chemical Electrochemical Syntheses of SolubleElectroconducting Poly(2,5-Thienylene)Derivatives" J.Macromol.Sci.-Chem.A28. 1245-1254 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yung-Woo PARK: "Metallic Properties of Transition Metal-Halides Doped Polyacetylene:The Soliton Liquid State" Synthetic Metals. 41. 27-32 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chul Oh YOON: "Thermoelectric Power and Conductivity of the Stretch-Oriented Polyacetylene Film Doped with MoCl_5" Synthetic Metals. 41. 125-128 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kohzo ITO: "AC Conductivity of HS-PA and S-PA Films" Synthetic Metals,41,No.1-2,(1991),147-150. 41. 147-150 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroko KYOTANI: "Morphology Dependence of DSC Curves for Cis-Trans Isomerization of Polyacetylene Films" Synthetic Metals. 41. 151-154 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroko KYOTANI: "Analysis of Thermal Isomerization of Polyacetylene Films Prepared by Various Methods" Rep.Prog.Polym.Phys.Jpn.34. 141-144 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kohzo ITO: "Complex Conductivity of Polyacetylene Films prepared by Different Methods" Phys.Rev.B.45. 1246-1254 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Stereospecific Chlorination of Polyacetylene by Chemical Doping" Polymer. 33. 4058-4065 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Intrinsic Non-Solvent Polymerization Method for Synthesis of Highly Stretchable and Highly Conductive Polyacetylene Films" Macromolecules. 25. 6725-6726 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kohzo ITO: "Comparative Study on the Complex Conductivity of Polyacetylene Films Prepared by Different Methods" Bulletin of Research Institute for Polymers and Textiles. 170. 31-40 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chul Oh YOON: "The Soliton State of Heavily Doped Polyacetylene" Mol.Crsyt.Liq.Cryst.224. 69-73 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Se Young OH: "Polymerization of 4-Phenyl-l-Butyne Catalyzed by Metathesis and Ziegler-Natta Catalysts" J.Polym.Sci.Part A:Polym.Chem.(1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Dependence of Electrical Conductivity on Film Thickness in Polyacetylene-Effects of Mechanically Forced Parallel and In-plane Alignments of Fibrils" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Intrinsic Non-Solvent Polymerization Method for Synthesis of Polyacetylene Films" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chul Oh YOON: "Temperature Dependent Anisotropy of Intermediately Doped Polyacetylene" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "Development of Highly Conducting Polyacetylene Films with High Tensile Strength and High Stretchability" Proceedings of the Japan Congress on Materials Research. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideki SHIRAKAWA: "Synthesis and Characterization of Polyacetylene.Conjugated Polymers and Related Materials:The Interconnection Chemical and Electronic Structure," Proceedings for The Eighty-First Nobel Symposium. 65-72 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideki SHIRAKAW: "Synthesis of Highly Conducting Polyacetylene Thin Films" Progrss of Theoretical Physics,Supplement. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuo AKAGI: "ESR Study on Ti(OR)_4-AlR'_3 Catalyst Systems-Structural Changes of Ti^<3+> Complex upon High-Temperature Aging" Synthetic Metals. 40 No. 2,. 197-218 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Mechanism of Stereospecific Chlorination of Polyene via Prolonged Chemical Doping" J. Mol. Struct. (Theochem). 232. 211-224 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideki SHIRAKAWA: "S-(CH)_x and N-(CH)_x-What is the Difference?" Synthetic Metals. 41, No, 1-2. 13-18 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshikazu TANABE: "Kinetic Analysis of Cis-Trans Thermal Isomerization of Polyacetylene" J. Polym. Sci., Part B, Polym. Phys.29, No.4,. 501-507 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideki SHIRAKAWA: "Chemical and Electrochemical Syntheses of Soluble Electroconducting Poly(2,5-Thienylene) Derivatives" J. Macromol. Sci.-Chem.A28 (11&12). 1245-1254 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yung-Woo PARK: "Metallic Properties of Transition Metal-Halides Doped Polyacetylene:The Soliton Liquid State" Synthetic Metals. 41, No.1-2. 27-32 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Chul Oh YOON: "Thermoelectric Power and Conductivity of the Stretch-Oriented Polyacetylene Film Doped with MoCl_5" Synthetic Metals. 41, No.1-2. 125-128 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kohzo ITO: "AC Conductivity of HS-PA and S-PA Films" Synthetic Metals. 41, No.1-2. 147-150 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroko KYOTANI: "Morphology Dependence of DSC Curves for Cis-Trans Isomerization of Polyacetylene Films" Synthetic Metals. 41, No.1-2. 151-154 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroko KYOTANI: "Analysis of Thermal Isomerization of Polyacetylene Films Prepared by Various Methods" Rep. Prog. Polym. Phys.34. 141-144 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kohzo ITO: "Complex Conductivity of Polyacetylene Films Prepared by Different Methods" Phys. Rev. B.45, No. 3. 1246-1254 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Stereospecific Chlorination of Polyacetylene by Chemical Doping" Polymer, 33. No. 19. 4058-4065 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Intrinsic Non-Solvent Polymerization Method for Synthesis of Highly Stretchable and Highly Conductive Polyacetylene Films" Macromolecules. 25, No. 24. 6725-6726 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kohzo ITO: "Comparative Study on the Complex Conductivity of Polyacetylene Films Prepared by Different Methods" Bulletin of Research Institute for Polymers and Textiles. No. 170. 31-40 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Chul Oh YOON: "The Soliton State of Heavily Doped Polyacetylene" Mol. Cryst. Liq. Cryst.224. 69-73 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Se Young OH: "Polymerization of 4-Phenyl-1-Butyne Catalyzed by Metathesis and Ziegler-Natta Catalysts" J. Polym. Sci., Part A:Polym. Chem.(1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Dependence of Electrical Conductivity on Film Thickness in Polyacetylene-Effects of Mechanically Forced Parallel and In-plane Alignments of Fibrils" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Intrinsic Non-Solvent Polymerization Method for Synthesis of Polyacetylene Films" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Chul Oh YOON: "Temperature Dependent Anisotropy of Intermediately Doped Polyacetylene" Synthetic Metals. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo AKAGI: "Development of Highly Conducting Polyacetylene Films with High Tensile Strength and High Stretchability" Proceedings of the Japan Congress on Materials Research. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideki SHIRAKAWA: "Synthesis and Characterization of Polyacetylene. Conjugated Polymers and Related Materials:The Interconnection of Chemical and Electronic Structure" Proceedings for The Eighty-First Nobel Symposium, Eds. W. R. Salaneck, I. Lundstrom, B. Ranby, Oxford University Press,. 65-72 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideki SHIRAKAWA: "Synthesis of Highly Conducting Polyacetylene Thin Films" Progres of Theoretical Physics, Supplement. (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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