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CLC number: O647

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Received: 2004-10-26

Revision Accepted: 2004-12-04

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.3 P.219-221

http://doi.org/10.1631/jzus.2005.B0219


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


Author(s):  ZHANG Zhi-guo, YIN Hong

Affiliation(s):  Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zhiguozhang2004@yahoo.com.cn

Key Words:  Nonionic surfactant, Propylene oxide-ethylene oxide block copolymers, Critical micelle concentration, Micellization


ZHANG Zhi-guo, YIN Hong. Effect of polyoxypropylene chain length on the critical micelle concentration of propylene oxide-ethylene oxide block copolymers[J]. Journal of Zhejiang University Science B, 2005, 6(3): 219-221.

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author="ZHANG Zhi-guo, YIN Hong",
journal="Journal of Zhejiang University Science B",
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doi="10.1631/jzus.2005.B0219"
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%A YIN Hong
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%I Zhejiang University Press & Springer
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T1 - Effect of polyoxypropylene chain length on the critical micelle concentration of propylene oxide-ethylene oxide block copolymers
A1 - ZHANG Zhi-guo
A1 - YIN Hong
J0 - Journal of Zhejiang University Science B
VL - 6
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Y1 - 2005
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2005.B0219


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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Reference

[1] Alexandridis, P., Yang, L., 2000. Micellization of polyoxyalkylene block copolymers in formamide. Macromolecules, 33:3382-3391.

[2] Chlebicki, J., Majtyka, P., 1999. Effect of oxypropylene chain length on the surface properties of dialkyl glycerol ether nonionic surfactants. J. Colloid Interface Sci., 220:57-62.

[3] Gente, G., Iovino, A., Mesa, C.L., 2004. Supramolecular association of a triblock copolymer in water. J. Colloid Interface Sci., 274:458-464.

[4] Kelarakis, A., Yang, Z., Pousia, E., Nixon, S.K., Price, C., Booth, C., Hamley, I.W., Castelletto, V., Fundin, J., 2001. Association properties of diblock copolymers of propylene oxide and ethylene oxide in aqueous solution. the effect of p and e block lengths. Langmuir, 17:8085-8091.

[5] Kucharski, S., Chlebicki, J., 1974. The effect of polyoxypropylene chain length on the critical micelle concentration of propylene oxide-ethylene oxide block copolymers. J. Colloid Interface Sci., 46:518-521.

[6] Shinoda, K.T., Nakagawa, T., Tamamushi, B., Isemura, T., 1963. Colloid Surfactant. Academic Press, New York, p.58.

[7] Waton, G., Michels, B., Zana, R., 2001. Dynamics of block copolymer micelles in aqueous solution. Macromolecules, 34:907-910.

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