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Dynamic rheological studies and applicability of time–temperature superposition principle for PA12/SEBS-g-MA blends

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Abstract

The viscoelastic behaviour of PA12/SEBS-g-MA blends was studied. Time sweep, amplitude sweep, and frequency sweep tests were analysed by the use of parallel-plate rheometer. Time sweep test shows time-independent viscoelastic behaviour of the polymer and blends during the entire duration of test. The critical shear strain was higher for PA12 as compared to that of SEBS-g-MA and the blends in amplitude sweep test. However, the plateau modulus was higher for SEBS-g-MA as compared to PA12. The complex viscosity, dynamic storage, and loss moduli of PA12 increased with the addition of SEBS-g-MA as a consequence of phase interaction between them. The influence of phase morphology of blend composition on their rheological properties was also examined. The blend showed a transformation from liquid-like to solid-like behaviour. The decrease in viscosity for PA12 and blends was observed with increasing temperature. The van Gurp plots was successfully used to validate time–temperature superposition principle (TTS) for PA12, SEBS-g-MA and blend compositions. PA12 holds TTS with a horizontal shift factor that fits Arrhenius equation. Whereas TTS fails for SEBS-g-MA and the blends studied because of different temperature-sensitive response and microstructural changes of melt during shear application.

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Acknowledgments

We acknowledge the financial support of Council of Scientific & Industrial Research, India, French embassy in India and Ecole des Mines d’Ales, France. Authors are thankful to all the laboratory members and Mr. Marc Longerey for their generous help and support. Author especially thanks to Mr. Belkacem Otazaghine for his helpful assistance and discussions.

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Authors and Affiliations

  1. Centre for Polymer Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

    Khushboo Rinawa & S. N. Maiti

  2. Centre des Matériaux de Grande Diffusion, Ecole des Mines d’Alès, 6, Avenue de Clavières, 30318, Alès Cedex, France

    R. Sonnier & J.-M. Lopez Cuesta

Authors
  1. Khushboo Rinawa
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  2. S. N. Maiti
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  3. R. Sonnier
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  4. J.-M. Lopez Cuesta
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Correspondence to S. N. Maiti.

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Rinawa, K., Maiti, S.N., Sonnier, R. et al. Dynamic rheological studies and applicability of time–temperature superposition principle for PA12/SEBS-g-MA blends. Polym. Bull. 72, 3305–3324 (2015). https://doi.org/10.1007/s00289-015-1467-4

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  • DOI: https://doi.org/10.1007/s00289-015-1467-4

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