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Alkyl (C10, C12, C14 and C16) triphenyl phosphonium bromide influenced cloud points of nonionic surfactants (Triton X 100, Brij 56 and Brij 97) and the polymer (Polyvinyl methyl ether)

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Abstract

The clouding points (CP) of the nonionic surfactants p-tert-octyl phenyl polyoxyethylene ether (Triton X 100), Brij-56 and Brij-97, and the water soluble polymer polyvinylmethylether (PVME) have been measured in the presence of the ionic surfactants alkyl (C10, C12, C14 and C16) triphenyl phosphonium bromides (ATPBs). The threshold additive concentrations required for efficient CP enhancement of the systems that were studied have been determined. Considering CP as the threshold state of phase separation, the energetics of the process at different additive concentrations has been evaluated. The spontaneity of free energy of the clouding process (ΔG 0c ) at the transition concentrations followed the order PVME > TX 100 ≈ Bj 56 > Bj 97. The clouding process has been found to be energetically endothermic with fairly large enthalpy and entropy changes that nicely compensate each other. The compensation temperature has been evaluated and compared with different types of the clouding agents.

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Acknowledgements

This work was done in a collaborative project by utilizing a research grant from the St. Francis Xavier University, Canada, to the Centre for Surface Science, Jadavpur University, with a fellowship to Madhumita Prasad. AW and SM acknowledge the USRA award from NSERC (2003). RP acknowledges the funding from NSERC of Canada in the form of an operating grant. SPM thanks the Indian National Science Academy for the Senior Scientist position.

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Authors and Affiliations

  1. Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata, 700032, West Bengal, India

    M. Prasad & S. P. Moulik

  2. Department of Chemistry, St. Francis Xavier University, Nova Scotia, Canada

    A. Al. Wardian, S. Moore, A. van Bommel & R. Palepu

Authors
  1. M. Prasad
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  2. S. P. Moulik
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  3. A. Al. Wardian
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  4. S. Moore
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  5. A. van Bommel
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  6. R. Palepu
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Correspondence to S. P. Moulik or R. Palepu.

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Prasad, M., Moulik, S.P., Wardian, A. et al. Alkyl (C10, C12, C14 and C16) triphenyl phosphonium bromide influenced cloud points of nonionic surfactants (Triton X 100, Brij 56 and Brij 97) and the polymer (Polyvinyl methyl ether). Colloid Polym Sci 283, 887–897 (2005). https://doi.org/10.1007/s00396-004-1231-z

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  • DOI: https://doi.org/10.1007/s00396-004-1231-z

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