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Journal of Materials Science

, Volume 41, Issue 17, pp 5467–5479 | Cite as

Poly(ether ether ketone) with pendent methyl groups as a toughening agent for amine cured DGEBA epoxy resin

  • Bejoy Francis
  • V. Lakshmana Rao
  • Seno Jose
  • Bina K. Catherine
  • R. Ramaswamy
  • Jesmy Jose
  • Sabu Thomas
Article

Abstract

A diglycidyl ether of bisphenol-A (DGEBA) epoxy resin was modified with poly(ether ether ketone) with pendent methyl groups (PEEKM). PEEKM was synthesised from methyl hydroquinone and 4,4′-difluorobenzophenone and characterised. Blends of epoxy resin and PEEKM were prepared by melt blending. The blends were transparent in the uncured state and gave single composition dependent Tg. The Tg-composition behaviour of the uncured blends has been studied using Gordon–Taylor, Kelley–Bueche and Fox equations. The scanning electron micrographs of extracted fracture surfaces revealed that reaction induced phase separation occurred in the blends. Cocontinuous morphology was obtained in blends containing 15 phr PEEKM. Two glass transition peaks corresponding to epoxy rich and thermoplastic rich phases were observed in the dynamic mechanical spectrum of the blends. The crosslink density of the blends calculated from dynamic mechanical analysis was less than that of unmodified epoxy resin. The tensile strength, flexural strength and modulus were comparable to that of the unmodified epoxy resin. It was found from fracture toughness measurements that PEEKM is an effective toughener for DDS cured epoxy resin. Fifteen phr PEEKM having cocontinuous morphology exhibited maximum increase in fracture toughness. The increase in fracture toughness was due to crack path deflection, crack pinning, crack bridging by dispersed PEEKM and local plastic deformation of the matrix. The exceptional increase in fracture toughness of 15 phr blend was attributed to the cocontinuous morphology of the blend. Finally it was observed that the thermal stability of epoxy resin was not affected by the addition of PEEKM.

Keywords

Fracture Toughness Crosslink Density Neat Resin Ether Ether Ketone Good Interfacial Adhesion 

Notes

Acknowledgements

The authors thank the authorities of Vikram Sarabhai Space Centre for giving permission to publish this article. One of the authors (Bejoy Francis) is thankful to CSIR, New Delhi for providing Senior Research Fellowship. Thanks are also due to Analytical and Spectroscopy Division, VSSC for analytical support.

References

  1. 1.
    Ellis B (1993) Chemistry and technology of epoxy resins. Blackie Academic and Professional, LondonCrossRefGoogle Scholar
  2. 2.
    Lee H, Neville K (1967) Handbook of epoxy resin. McGraw Hill, New YorkGoogle Scholar
  3. 3.
    Encyclopaedia of polymer science and engineering, vol 6, 2nd ed. Wiley Interscience, pp 322–382Google Scholar
  4. 4.
    Kang BU, Jho JY, Kim J, Lee SS, Park M, Lim S, Choe CR (2001) J Appl Polym Sci 79:38CrossRefGoogle Scholar
  5. 5.
    Arias ML, Frontini PM, Williams RJJ (2003) Polymer 44:1537CrossRefGoogle Scholar
  6. 6.
    Hwang JF, Manson JA, Herztberg RW, Miller GA, Sperling LH (1989) Polym Eng Sci 29:1466CrossRefGoogle Scholar
  7. 7.
    Butta E, Levita G, Marchetti A, Lazeri A (1986) Polym Eng Sci 26:63CrossRefGoogle Scholar
  8. 8.
    Garg C, MAI YW (1988) Compos Sci Technol 31:179CrossRefGoogle Scholar
  9. 9.
    Pearson RA, Yee AF (1983) J Mater Sci 24:2571CrossRefGoogle Scholar
  10. 10.
    Blanco I, Cicala G, Faro CL, Recca A (2003) J Appl Polym Sci 89:268CrossRefGoogle Scholar
  11. 11.
    Giannotti MI, Foresti ML, Mondragon I, Galante MJ, Oyanguren PA (2004) J Polym Sci Part B Polym Phys 42:3953CrossRefGoogle Scholar
  12. 12.
    Giannotti MI, Mondragon I, Galante MJ, Oyanguren PA (2004) J Polym Sci Part B Polym Phys 42:3964CrossRefGoogle Scholar
  13. 13.
    Cao Y, Shao Y, Sun J, Lin S (2003) J Appl Polym Sci 90:3384CrossRefGoogle Scholar
  14. 14.
    Jasinski W, Carlier V, Legras R, Mormann W (2003) Macromol Symp 198:323CrossRefGoogle Scholar
  15. 15.
    Torres A, De Ullibarri IL, Abad MJ, Barral L, Cano J, Garabal SG, Diez FJ, Lopez J, Ramirez C (2004) J Appl Polym Sci 92:461CrossRefGoogle Scholar
  16. 16.
    Teng KC, Chang FC (1996) Polymer 37:2385CrossRefGoogle Scholar
  17. 17.
    Guo Q, Huang J, Ge L, Feng Z (1992) Eur Polym J 28:405CrossRefGoogle Scholar
  18. 18.
    Iijima T, Tomoi M, Tochimoto T, Kakiuchi H (1991) J Appl Polym Sci 43:463CrossRefGoogle Scholar
  19. 19.
    Gianotti MI, Solsona MS, Galante MJ, Oyanguren PA (2003) J Appl Polym Sci 89:405CrossRefGoogle Scholar
  20. 20.
    Park SJ, Kim HC (2001) J Polym Sci Part B Polym Phys 39:121CrossRefGoogle Scholar
  21. 21.
    Iijima T, Mimura S, Fujimaki M, Taguchi T, Fukuda W, Tomoi M (1996) J Appl Polym Sci 61:163CrossRefGoogle Scholar
  22. 22.
    Pasquale GD, Motta O, Recca A, Garter JT, Mc Grail PT, Acierno D (1997) Polymer 38:4345CrossRefGoogle Scholar
  23. 23.
    Ratna D, Patri M, Chakraborty BC, Deb PC (1997) J Appl Polym Sci 65:901CrossRefGoogle Scholar
  24. 24.
    Zhong Z, Zheng S, Huang J, Cheng X, Guo Q (1998) J WEI Polym 39:1075CrossRefGoogle Scholar
  25. 25.
    Bennet GS, Farris RJ, Thompson SA (1991) Polymer 32:1633CrossRefGoogle Scholar
  26. 26.
    Francis B, Poel GV, Posada F, Groeninckx G, Rao VL, Ramaswamy R, Thomas S (2003) Polymer 44:3687CrossRefGoogle Scholar
  27. 27.
    Fox TG (1956) Bull Am Phys Soc 2:123Google Scholar
  28. 28.
    Gordon M, Taylor J (1952) J Appl Chem 2:495Google Scholar
  29. 29.
    Kelley FN, Bueche F (1961) J Polym Sci 50:549CrossRefGoogle Scholar
  30. 30.
    Belorgey G, Prud’homme RE (1982) J Polym Sci Part B Polym Phys 20:191CrossRefGoogle Scholar
  31. 31.
    Belorgey G, Aubin M, Prud’homme RE (1982) Polymer 23:1051CrossRefGoogle Scholar
  32. 32.
    Iijima T, Tochimoto T, Tomoi M (1991) J Appl Polym Sci 43:1685CrossRefGoogle Scholar
  33. 33.
    Martinez I, Martin MD, Eceiza A, Oyanguren P, Mondragon I (2000) Polymer 41:1027CrossRefGoogle Scholar
  34. 34.
    Min BG, Stachurski ZH, Hodgkin JH, Heath GR (1993) Polymer 34:3620CrossRefGoogle Scholar
  35. 35.
    Nielsen LE (1969) Rev Makromol Chem C3:77Google Scholar
  36. 36.
    Bellenger V, Verdu J, Morel E (1987) J Polym Sci B25:1219CrossRefGoogle Scholar
  37. 37.
    Kramer EJ, Berger LL (1990) Adv Polym Sci 91/92:1CrossRefGoogle Scholar
  38. 38.
    Liello VD, Martuscelli E, Musto P, Ragosta G, Scarinzi G (1994) J Polym Sci Part B Polym Phys 32:409CrossRefGoogle Scholar
  39. 39.
    Chen MC, Hourston DJ, Sun WB (1992) Eur Polym J 28:1471CrossRefGoogle Scholar
  40. 40.
    Min HS, Kim SC (1999) Polym Bull 42:221CrossRefGoogle Scholar
  41. 41.
    Coats AW, Redfern JP (1964) Nature 201:68CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Bejoy Francis
    • 1
  • V. Lakshmana Rao
    • 1
  • Seno Jose
    • 2
  • Bina K. Catherine
    • 1
  • R. Ramaswamy
    • 1
  • Jesmy Jose
    • 2
  • Sabu Thomas
    • 2
  1. 1.Polymers and Special Chemicals Division, Analytical and Spectroscopy Division, Propellants and Special Chemicals Group, Propellants Chemicals and Materials EntityVikram Sarabhai Space CentreThiruvananthapuramIndia
  2. 2.School of Chemical SciencesMahatma Gandhi UniversityKottayamIndia

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