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Enhanced heat stability and storage modulus in novel PTMO-intercalated clay platelets/PTMO-based polyurethane nanocomposites

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Abstract

Amine-telechelic poly(tetramethylene oxide) (PTMO) was trimethylated to a quaternary ammonium (QA)-capped PTMO as a bivalent organic macrocation. This QA-capped PTMO (QAPTMO) was used for intercalation of montmorillonite (MMT) platelets with 69 % ion exchange yield and 4.03 nm d-spacing. Then, segmented polyurethanes (SPU) with PTMO soft segments were synthesized in the presence of the QAPTMO-intercalated MMT filler in different contents. According to the X-ray and SEM analyses, the polyaddition reaction could result in a full exfoliation of the clay platelets. Two model composites including SPU polymer loaded by unmodified MMT and tetradecyltrimethylammonium bromide (TTAB)-intercalated MMT were also synthesized analogously. The SPU/QAPTMO-MMT composites possessing 5.0 and 7.0 wt.% of the filler obviously showed a better thermal behavior in comparison with SPU/TTAB-MMT and SPU/Na-MMT composites. In addition, a significant increase in the storage moduli of the polyurethane matrices occurred due to the QAPTMO-MMT particles, particularly in the 5.0 wt.% loading content of the filler.

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Acknowledgments

The authors wish to express their gratitude to the Faculty of Chemistry and Research Council of Damghan University for financial support of this research, and to Amirkabir University and University of Tehran for carrying out the DMTA and SEM analyses, respectively.

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Authors and Affiliations

  1. Faculty of Chemistry, Damghan University, Damghan, 36715-364, Iran

    Hossein Behniafar, Aziz Ahmadi-khaneghah & Mojtaba Yazdi

Authors
  1. Hossein Behniafar
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  2. Aziz Ahmadi-khaneghah
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  3. Mojtaba Yazdi
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Correspondence to Hossein Behniafar.

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Behniafar, H., Ahmadi-khaneghah, A. & Yazdi, M. Enhanced heat stability and storage modulus in novel PTMO-intercalated clay platelets/PTMO-based polyurethane nanocomposites. J Polym Res 23, 202 (2016). https://doi.org/10.1007/s10965-016-1097-z

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  • DOI: https://doi.org/10.1007/s10965-016-1097-z

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