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Time Dependent Constitutive Behavior and Fracture/Failure Processes, Volume 3 pp 33–37Cite as

Linear Viscoelastic Behavior of Poly(Ethylene Therephtalate) Above Tg Amorphous Visco-elastic Property VS Crystallinity: Experimental and Micromechanical Modeling

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Abstract

Linear viscoelastic behavior of amorphous and semi-crystalline Poly(ethylene teraphtalate), PET, was experimentally investigated. Micromechanics models were used to predict the elastic and plastic behavior of semi-crystalline polymers successfully, however the viscoelastic behavior still difficult to be predicted with such models. Difficulties lie on the used numerical methods and also on the understanding of the properties of the amorphous phase. In this paper we tried to first simplify the Laplace Carson-based method by using a pseudo-elastic method that ovoid the numerical difficulties encountered before. The time-dependant problem is so replaced by a frequency-dependant set of elastic equations. To validate the new approach, Poly(ethylene threphtalate) (PET) with different crystallinity fraction (Xc) were prepared and characterized. Based on our experimental results (properties of the amorphous PET and semi-crystalline polymers) micromechanical model were used to first predict the viscoelastic properties of the semi-crystalline polymers and also to predict the changes on the viscoelastic properties of the amorphous phase when the crystallinity fraction increases. Good agreement between the predicted and experimental results of the low crystallinty fraction sample (Xc=17%). However for high crystallinity (Xc=24% and Xc=35%) prediction based on the identified amorphous phase as an input for the micromechanical properties failed to fit the viscoelastic behavior of the semi-crystalline polymer. Based on the dynamic mechanical analysis (DMA) experimental data, changes on the glass transition temperature of the amorphous phase were observed, which could confirm the change of the viscoelastic properties of the amorphous phase upon crystallization. This result confirms the effect of confinement due to the presence of the crystalline phase on the prediction of the viscolelastic behavior of semi-crystalline polymer using micromechanical models.

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  1. Lee, B.J., et al., Simulation of large strain plastic deformation and texture evolution in high density polyethylene. Polymer, 1993. 34(17): p. 3555–3575.

    Article  Google Scholar 

  2. Lee, B.J., D.M. Parks, and S. Ahzi, Micromechanical modeling of large plastic deformation and texture evolution in semi-crystalline polymers. Journal of the Mechanics and Physics of Solids, 1993. 41(10): p. 1651–1687.

    Article  MATH  Google Scholar 

  3. G'Sell, C. and A. Dahoun, Evolution of microstructure in semi-crystalline polymers under large plastic deformation. Materials Science and Engineering: A, 1994. 175(1–2): p. 183–199.

    Article  Google Scholar 

  4. Dahoun, A., et al., Plastic behavior and deformation textures of poly(etherether ketone) under uniaxial tension and simple shear. 1995. p. 317–330.

    Google Scholar 

  5. van Dommelen, J.A.W., et al., Micromechanical modeling of the elasto-viscoplastic behavior of semi-crystalline polymers. Journal of the Mechanics and Physics of Solids, 2003. 51(3): p. 519–541.

    Article  MATH  Google Scholar 

  6. van Dommelen, J.A.W., et al., Micromechanical modeling of intraspherulitic deformation of semicrystalline polymers. Polymer, 2003. 44(19): p. 6089–6101.

    Article  Google Scholar 

  7. Ahzi, S., D.M. Parks, and A.S. Argon, Estimates of the overall elastic properties in semicrystalline polymers. American Society of Mechanical Engineers, Applied Mechanics Division, AMD 1995. 203 p. 31–40.

    Google Scholar 

  8. Bédoui, F., et al., Micromechanical modeling of isotropic elastic behavior of semicrystalline polymers. Acta Materialia, 2006. 54(6): p. 1513–1523.

    Article  Google Scholar 

  9. Guan, X. and R. Pitchumani, A micromechanical model for the elastic properties of semicrystalline thermoplastic polymers. Polymer Engineering and Science, 2004. 44(3): p. 433–451.

    Article  Google Scholar 

  10. Gueguen, O., et al., A new three-phase model to estimate the effective elastic properties of semi-crystalline polymers: Application to PET. Mechanics of Materials, 2010. 42(1): p. 1–10.

    Article  Google Scholar 

  11. Bédoui, F., J. Diani, and G. Régnier, Micromechanical modeling of elastic properties in polyolefins. Polymer, 2004. 45(7): p. 2433–2442.

    Article  Google Scholar 

  12. Schapery, R.A., On the characterization of nonlinear viscoelastic materials. 1967. p. 295–310.

    Google Scholar 

  13. Rekik, A. and R. Brenner. 2007, AFM, Maison de la Mécanique, 39/41 rue Louis Blanc - 92400 Courbevoie.

    Google Scholar 

  14. Diani, J., F. Bédoui, and G. Régnier, On the relevance of the micromechanics approach for predicting the linear viscoelastic behavior of semi-crystalline poly(ethylene)terephtalates (PET). Materials Science and Engineering: A, 2008. 475(1–2): p. 229–234.

    Article  Google Scholar 

  15. Illers, K.H. and H. Breuer, Molecular motions in polyethylene terephthalate. Journal of Colloid Science, 1963. 18(1): p. 1–31.

    Article  Google Scholar 

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Authors and Affiliations

  1. Laboratoire Roberval UMR-CNRS 6253, Université de Technologie de Compiègne, Compiègne, France

    Fahmi Bédoui

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  1. Fahmi Bédoui
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Correspondence to Fahmi Bédoui .

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  1. The Society for Experimental Mechanics,, 7 School Street, Bethel, 06801-1405, USA

    Tom Proulx

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Bédoui, F. (2011). Linear Viscoelastic Behavior of Poly(Ethylene Therephtalate) Above Tg Amorphous Visco-elastic Property VS Crystallinity: Experimental and Micromechanical Modeling. In: Proulx, T. (eds) Time Dependent Constitutive Behavior and Fracture/Failure Processes, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9794-4_5

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  • DOI: https://doi.org/10.1007/978-1-4419-9794-4_5

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4419-9498-1

  • Online ISBN: 978-1-4419-9794-4

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