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Citation: Dai Le-Rong, Wu Pei-Qiang, Zhou Zu-Kang. Effect of Solubilized Toluene on Micelle of Polyoxyethylene-Polyoxypropylene Block Copolymer[J]. Acta Physico-Chimica Sinica, ;1992, 8(01): 22-26. doi: 10.3866/PKU.WHXB19920106 shu

Effect of Solubilized Toluene on Micelle of Polyoxyethylene-Polyoxypropylene Block Copolymer

1.
Institute of Physical Chemistry, Peking University, Beijing 100871

Received Date: 20 July 1990
Available Online: 15 February 1992

Effect of the amount of solubilized toluene on the hydrodynamic radius R_h of micelle of polyoxythylene(PEO)-polyoxypropylene(PPO) block copolymer was inves-tigated by dynamic lightscattering at different temperatures.
The result showed that the values of R_h were rather high due to strong hydration of PEO chains at 25 ℃, the amount of toluene in micelle had little effect on the values of R_h. As the temperature increased, hydration of micelle decreased and R_h decreased also. Near the temperature of the cloud point, the dehydration of micelle might be very strong, PPO core was swollen by toluent and aggregation number increased at higher temperatures, this made R_h increasing linearly with the amount of solubliized toluene.
- Micelle of block copolymer; Solubilized toluene; Hydrodynamic radius
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