• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Studies on Development of Molecular Composites Directed to Substitution of High-Performance FRP

Research Project

Project/Area Number 02555182
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 高分子物性・高分子材料(含機械材料)
Research InstitutionKyushu Sangyo University

Principal Investigator

TAKAYANAGI Motowo  Kyushu Sangyo Univ., Fac. of Eng.,Professor, 工学部, 教授 (40037643)

Co-Investigator(Kenkyū-buntansha) UETA Shigeyuki  Kyushu Sangyo Univ., Fac. of Eng.,Lecturer, 工学部, 講師 (90069576)
YONEMITSU Tadashi  Kyushu Sangyo Univ., Fac. of Eng.,Professor, 工学部, 教授 (00069501)
NAGAISHI Toshiyuki  Kyushu Sangyo Univ., Fac. of Eng.,Professor, 工学部, 教授 (20069529)
Project Period (FY) 1990 – 1992
KeywordsMolecular composite / Phase separation / Rigid rodlike molecule / Nylon 6 / Modulus / Yield stress / FTIR / Poly(p-phenyleneterephthalamide)
Research Abstract

FRP has disadvantages of limitation in fiber strength and heterogeneous texture. Molecular composite(MC) composed of rigid rodlike molecule and fexible coil-like molecule is expected to be single-phase and free from defects. This research project mainly placing target to the system of poly(p-phenyleneterephthalamide)(PPTA) and nylon 6(Ny6) revealed the following conclusions: (1) a stable single-phase MC is obtained by using a matrix polymer with huge molecular weight, with which diffusion and phase separation of rigid rodlike molecules in MC are hindered, (2)clustering of rod molecules reduces the efficiency of stress transfer and the modulus and yield stress of MC are decreased, (3) the increased molecular weight of rod molecules increases modulus and yield stress of MC, which can be similarly explained as the theory of FRP predicts, and (4) the elongation of MC is small if only the intermolecular force between rod and flexible molecules is employed for stress transfer. By block copolymerization of rod and flexible chain blocks, the elongation of MC is highly improved due to the effect of stress transfer from rod to flexible molecules. Such a chemical modification of rod molecules is impossible in case of reinforcing fiber in FRP.
A MC prepared by using Ny6 with molecular weight of 260,000 showed entirely dark image under polarization microscope with crossed polars after hot-pressed at temperature above the melting temperature of Ny6 indicating a single phase, stable MC. FTIR of N-H stretching band showed a sharp, single absorption, indicating cross-hydrogen bonding between amide groups of PPTA and Ny6. No crystallization and melting peaks in DSC curves were found in this case. Molecular dispersity of MC was supported with these observations.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] M.TAKAYANAGI: "Microcomposites Formation of P-Aramid with Inorganic Glass and Conductive Polymers" Second Pacific Polymer Conference. 1-2 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高柳 素夫,古賀 啓子,植田 茂行: "p-アラミド膜内でのin-situ重合によるミクロコンポジットの生成" 高分子学会予稿集. 40. 3016-3018 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 本土 隆一,植田 茂行,古賀 啓子,高柳 素夫: "パラ型アラミド膜を用いた無機ガラスとのミクロコンポジット" 九州産業大学工学部研究報告. 28. 87-91 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.TAKAYANAGI: "Mechanical relaxation of poly(p-phenylene terephthalamide) thin film" Plastics Rubber and Composites Processing and Applications. 17. 317-324 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.UETA,T.SAKAMOTO,and M.TAKAYANAGI: "Effects of Molecular Weight of Nylon 6 on the Structure and Properties of Nylon 6/Poly(p-phenyleneterephthalamide) Molecular Composites" Polymer Journal. 25. 31-40 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.UETA,E.-Y.Lei,K.KOGA,and M.YAKAYANAGI: "Preparation of N-Grafted Poly(p-phenylenetere-phthalamide) and Applications to a Molecular Composete With Epoxy Resin" Polymer Journal. 25. 185-191 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.TAKAYANAGI: "Frontires of Macromolecular Science" Blackwell Scientific Publications, 369-374 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.TAKAYANAGI: "Progress in Pacific Polymer Science 2" Springer-Verlag Belrin Heidelberg, 1-12 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Takayanagi: "Microcomposites Formation of p-Aramid with Inorganic Glass and Conductive Polymers" Second Pacific Polymer Conference. 1-2 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Takayanagi K. Koga S. Ueta: "Microcomposite Formation by In-Situ Polymerization Inside p-Aramid Membrane" Polymer Preprints, Japan. 40. 3016-3018 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Hondo, S. Ueta K. Koga M. Takayanagi: "Microcomposite of p-Aramid Membrane and Inorganic Glass" Bulletin of The Faculty of Eng. Kyushu Sangyo Univ.28. 87-91 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Takayanagi: "Mechanical relaxation of poly(p-phenyleneterephthalamid) thin film" Plastics, Rubber and Composites Processing and Applications. 17. 317-324 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Ueta T. Sakamoto M. Takayanagi: "Effects of Molecular Weight of Nylon 6 on the Structure and Properties of Nylon 6/ Poly(p-phenyleneterephthalamide) Molecular Composites" Polymer Journal. 25. 31-40 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. ueta, W.-Y.Lei K. Koga, M. Takayanagi: "Preparation of N-Grafted Poly(p-phenyleneterephthalamid) and Applications to a Molecular Composite with Epoxy Resin" Polymer Journal. 25. 185-191 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Ueta, R. Hondo K. Koga, M. Takayanagi: "Poly(p-phenyleneterephthalamido) Film Reinforced by In-situ Polymerized Silica" Macromolecular Reports. A20. 17-25 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Takayanagi: "Frontiers of Macromolecular Science" Blackwell Scientific Publications. 369-374 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Takayanagi: "Progress in Pacific Polymer Science 2" Springer-Verlag Belrin Heidelberg. 1-12 (1992)

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

URL: 

Published: 1994-03-24  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi