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Synthesis and Properties of Amphiphilic Polymers

Research Project

Project/Area Number 06044114
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

YAMAOKA Hitoshi  Kyoto University, professor, 工学研究科, 教授 (80026004)

Co-Investigator(Kenkyū-buntansha) LODGE Timothy p.  University of Minnesota, professor, 化学科, 教授
TIRRELL Matthew  University of Minnesota, professor, 化学工学ー材料科学科, 教授
MATSUOKA Hideaki  Kyoto University, Lecturer, 工学研究科, 助手 (40165783)
SAWAMOTO Mitsuo  Kyoto University, professor, 工学研究科, 教授 (90150325)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1995: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1994: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsAmphiphilic polymer / Block polymer / Living cationic polymerization / Polymer micelle / Surface activity / Small-angle neutron scattering / Small-angle X-ray scattering
Research Abstract

This 2-year Japan-U.S.bilateral research project has been directed to "amphiphilic polymers", or macromolecules consisting of both hydrophilic and hydrophobic moieties, for which efforts have been focused on : (a) precision sample syntheses ; (b) their behavior in solution and at surface or interface ; (c) factors affecting their hydrophilic and hydrophobic interactions ; and (d) relations between their spatial shapes and functions. A brief summary follows :
1.Synthesis of Amphiphilic Polymers
Four series of well-defined amphiphilic polymers have been synthesized by the living cationic polymerization developed by the Japanese members :
(A) AB-block copolymers of 2-hydroxyethyl and 2-phenoxyethyl vinyl ethers ;
(B) AB-block copolymers of 2-hydroxyethyl and n-butyl vinyl ethers ;
(C) Partially deuterated analogs of block copolymers A and B where the phenyl and the n-butyl pendant groups are deuterated, respectively ;
(D) Tetraarmed block copolymers of vinyl ether and stirene derivatives.
2.Ligh … More t Scattering and X-Ray Scattering Analyzes
Solubilization of hydrophobic dyes into water by these polymers confirmed that they are amphiphilic and thus form micelles, which were further analyzed by scattering methods :
(a) Dynamic light scattering (DLS) for the micelle sizes ;
(b) Forced Rayleigh scattering for the diffusion constants (by the American members) ;
(c) Small-angle X-ray scattering (SAXS) for the shape and number of the micelles.
For example, the DLS analysis (a) of the 4-arm polymers D showed their sharp response to solvent polarity, unimers in ethanol and micelles in chloroform. The SAXS data (c) for the linear polymers A and B indicated that increasing polymer concentration increases the number of micelles without changing their shapes.
3.Neutron Scattering Analysis
Small-angle neutron scattering (SANS) was applied to the partially deuterated amphiphiles C in D_2O/H_2O mixtures for the contrast variation method. Dependence of SANS profiles on the solvent composition revealed core-shell architectures of the block polymers, the shapes of which change from spherical to ellipsoidal on increasing length of the hydrophobic segments.
4.Surface and Interface Analysis
Effective surface activity of polymers A and B were shown by clear reduction of the surface and interfacial tensions of water in their presence at low concentrations. These amphiphiles also interact with silica surface ; the strength and distance of the interaction was evaluated by evanescent light wave scattering. Less

Report

(2 results)
  • 1995 Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 山岡仁史: "両親媒性ポリマーの合成と物性" 高分子加工. 43. 152-159 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization.3.Synthesis of Tri- and Tetraarmed Poly (vinyl ethers) with Tri- and Tetrafunctional Silyl Enol Ethers" Macromolecules. 27. 1297-1302 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization.IV.Synthesis of End-Functionalized Multiarmed Poly (vinyl ethers) with Multifunctional Silyl Enol Ethers" J.Polym.Sci.,Pt.A,Polym.Chem.32. 2699-2708 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Small-angle Neutron Scattering Study of the Micelle Structure of Amphiphilic Block Copolymers" Physica B. 213&214. 700-702 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Living Anionic Ring-Opening Polymerization of 1,1-Dimethylsilacyclobutane" Macromolecules. 28. 7029-7031 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Direct Estimation of Dynamic Characteristics and Interaction Potential of Latex Particles Interacting with a Glass Surface by Evanescent Wave Light-Scattering Microscope Method" Colloid Polym.Sci.273. 1201-1205 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization.5.Synthesis of Amphiphilic Tetraarmed Star Poly (vinyl ethers) by Coupling Reactions with Tetrafunctional Silyl Enol Ether" Macromolecules. 28. 3756-3765 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Evaluation of the Counterion Distribution around Spherical Micelles in Solution by Small-angle Neutron Scattering" Phys.Rev.E. 53. 1744-1752 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization.6.Synthesis of Multiarmed and End-Functionalized Poly (α-methylstyrene) with Multifunctional Silyl Enol Ethers" Macromolecules. 29. 1131-1137 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Synthesis and Properties of Amphiphilic Polymers" Kobunshi Kako (Polymer Processing). 43 (in Japanese). 152-159 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization. 3. Synthesis of Tri- and Tetraarmed Poly (vinyl ethers) with Tri- and Tetrafunctional Silyl Enol Ethers" Macromolecules. 27. 1297-1302 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization. IV.Synthesis of End-Functionalized Multiarmed Poly (vinyl ethers) with Multifunctional Silyl Enol Ether" J.Polym.Sci., Part A : Polym.Chem.32. 2699-2708 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Small-angle Neutron Scattering Study of the Micelle Structure of Amphiphilic Block Copolymers" Physica B. 213 & 214. 700-702 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Living Anionic Ring-Opening Polymerization of 1,1-Dimethylsilacyclobutane" Macromolecules. 28. 7029-7031 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Direct Estimation of Dynamic Characteristics and Interaction Potential of Latex Particles Interacting with a Glass Surface by Evanescent Wave Light-Scattering Microscope Method" Colloid Polym.Sci.273. 1201-1205 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization. 5.Synthesis of Amphiphilic Tetraarmed Star Poly (vinyl ethers) by Coupling Reactions with Tetrafunctional Silyl Enol Ether" Macromolecules. 28. 3756-3765 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Yamaoka: "Evaluation of the Counterion Distribution Around Spherical Micelles in Solution by Small-Angle Neutron Scattering" Physical Review E. 53. 1744-1752 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Sawamoto: "Multifunctional Coupling Agents for Living Cationic Polymerization. 6. Synthesis of Mulriarmed and End-Functionalized Poly (alpha-methylstirene) with Multifunctional Silyl Enol Ethers" Macromolecules. 29. 1131-1137 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山岡仁史,澤本光男: "両親媒性ポリマーの合成と物性" 高分子加工. 43. 152-159 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Yamaoka,H.Matsuoka,K.Sumaru,H.Hanada,M.Imai: "Small Angle Neutron Scattering Study of the Micelle Structure of Amphiphilic Block Copolymers" Physica B. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Fukui,M.Sawamoto,T.Higashimura: "Synthesis of Amphiphilic Tetraarmed Star Poly(Vinyl Ethers) by Coupling Reactions with Tetrafunctional Silyl Enol Ether" Macromolecules. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Fukui,S.Yoshihashi,M.Sawamoto,T.Higashimura: "Synthesis of Amphiphilic Tetraarmed Star Block Polymers with -Methylstyrene and 2-Hydroxyethyl Vinyl Ether Segments by Coupling Reacitons with Tetrafunctional Silyl Enol Ether" Macromolecules. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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