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Effect of polyoxypropylene chain length on the critical micelle concentration of propylene oxide-ethylene oxide block copolymers

  • Materials and Chemical Engineering
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Abstract

In this work, the surface activity of block copolymer nonionic surfactants (RPE) has been determined, i.e., critical micelle concentration (CMC), surface excess concentration (Γ), surface area demand per molecule (A), surface tension at CMC (γCMC). A linear decrease of ln[CMC] vs number of oxypropylene units in copolymer molecule was observed. The change in the work of cohesion per oxypropylene group when passing from molecular into micellar state, calculated from the Shinoda equation, was 0.43kT for the studied compounds.

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Authors and Affiliations

  1. Department of Chemical Engineering, Zhejiang University, 310027, Hangzhou, China

    Zhi-guo Zhang & Hong Yin

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  1. Zhi-guo Zhang
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  2. Hong Yin
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Correspondence to Zhi-guo Zhang.

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Project (No. 2004C31058) supported by the Zhejiang Provincial S&T Programme of China

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Zhang, Zg., Yin, H. Effect of polyoxypropylene chain length on the critical micelle concentration of propylene oxide-ethylene oxide block copolymers. J Zheijang Univ Sci B 6, 219–221 (2005). https://doi.org/10.1631/jzus.2005.B0219

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  • DOI: https://doi.org/10.1631/jzus.2005.B0219

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