Changes of Interfacial Adhesion by the Addition of Reactive Polymers

  • Kookheon Char
  • Yeonsoo Lee
  • Byeong In Ahn

Abstract

The effect of the structure of reactive polymers on the interfacial adhesion between immiscible Polystyrene (PS)/Poly(methyl methacrylate) (PMMA) and Poly(phenylene oxide) (PPO)/PMMA polymers was investigated. Mono- or di-carboxy terminated PS, Poly(glycidyl methacrylate) (PGMA) and well defined end-functionalized polymers were used as reactive compatibilizers. The amount of copolymer formed by reaction at an interface was estimated by measuring the interfacial fracture toughness using asymmetric fracture tests. In case of PS/PMMA joints, the dicarboxy terminated PS is more effective in obtaining a higher maximum fracture toughness since it provides two stitches to the interface and the loop conformation yielding two stitches for each dicarboxy PS chain is shown to be possible in present case by considering a simple scaling theory on dry brush type end-grafted chains. The chain areal density (Σ), estimated from the measured fracture toughness, is in good agreement with the value obtained with monodisperse deuterated monocarboxy end-functionalized PS and ion beam technique1 and scales as N−1 as predicted. In the case of joints between PPO and PMMA, it was demonstrated that in order to see any visible change in the interfacial fracture toughness with end-functionalized PS and PMMA it is required that the end-functionalized reactive polymers be allowed enough time to react each other without diffusive mixing with bulk homopolymer. The reaction rate constant for the reaction between the end-functionalized polymers was estimated by assuming a bimolecular reaction at interface and measuring the fracture toughness. The reaction rate constant estimated for the end-functionalized polymer pair is in fairly reasonable agreement with the value reported by others2 even though there is experimental difference in obtaining the reaction rate constant.

Keywords

Fracture Toughness Block Copolymer Reactive Polymer Interfacial Adhesion Polymer Brush 
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References

  1. 1.
    L.J. Norton, V. Smigolova, M.U. Pralle, A. Hubenko, K.H. Dai, E.J. Kramer, S. Hahn, C. Berglund, and B. Dekoven, Effect of end-anchored chain on the adhesion at a thermoset-thermoplastic interface, Macromolecules 28: 1999 (1995).Google Scholar
  2. 2.
    P. Guegan, C.W. Macosko, T. Ishizone, A. Hirao, and S. Nakahama, Kinetics of chain coupling at melt interface, Macromolecules 27: 4993 (1994).CrossRefGoogle Scholar
  3. 3.
    Y. Lee and K. Char, Enhancement of interfacial adhesion between amorphous polyamide and polystyrene by in-situ copolymer formation at interface, Macromolecules 27: 2605 (1994).Google Scholar
  4. 4.
    E.J. Kramer. L.J. Norton, C.-A. Dai, Y. Sha, and C.-Y. Hui, Strengthening polymer interfaces, Faraday Discuss. 98: 31 (1994).CrossRefGoogle Scholar
  5. 5.
    C. Creton, E.J. Kramer, C.-Y. Hui, H.R. Brown, Failure mechanism of polymer interfaces reinforced with block copolymers, Macromolecules 25: 3075 (1992).CrossRefGoogle Scholar
  6. 6.
    H.R. Brown, K. Char, V.R. Deline, and P.F. Green, Effect of diblock copolymer on adhesion between immiscible polymers: 1. PS-PMMA copolymer between PS and PMMA, Macromolecules 26: 4155 (1993).CrossRefGoogle Scholar
  7. 7.
    Y. Lee and K. Char, submitted to Macromolecules.Google Scholar
  8. 8.
    H.R. Brown, Mixed mode effect on the crack propagation at polymer interface, J. Mater. Sci. 25: 2791 (1990).CrossRefGoogle Scholar
  9. 9.
    C. Creton, H.R. Brown, and V.R. Deline, Influence of chain entanglement on the failure modes in block copolymer toughened interfaces, Macromolecules 27: 1774 (1994).CrossRefGoogle Scholar
  10. 10.
    Y. Sha, C.-Y. Hui. A. Ruina, and E.J. Kramer, Continuum and discrete modeling of craze failure at a crack tip in a glassy polymer. Macromolecules 28: 2450 (1995).CrossRefGoogle Scholar
  11. 11.
    E.J. Kramer, Crazing in Polymers, Adv. Poly. Sci. 52 /53: 1 (1983).CrossRefGoogle Scholar
  12. 12.
    L. Leibler, Emulsifying effects of block copolymers in incompatible polymer blends, Makromol. Chem. Macromol. Symp. 16: 1 (1988).CrossRefGoogle Scholar
  13. 13.
    N.P. Balsara, M. Tirrell, and T.P. Lodge, Micelle formation of BAB triblock copolymers in solvents that preferentially dissolve the A block, Macromolecules 24: 1975 (1991).CrossRefGoogle Scholar
  14. 14.
    K.R. Shull. Theory of end-adsorbed polymer brushes in polymeric matrices, J Chem. Phys. 94: 5723 (1991).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Kookheon Char
    • 1
  • Yeonsoo Lee
    • 1
  • Byeong In Ahn
    • 1
  1. 1.Department of Chemical EngineeringSeoul National UniversitySeoulKorea

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