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Citation: Bian Feng-Ling, Liu Ming-Zhu. The Temperature Dependence of the Viscosity of Poly (N,N-diethylacrylamide) Solutions[J]. Acta Physico-Chimica Sinica, ;2002, 18(09): 776-780. doi: 10.3866/PKU.WHXB20020902 shu

The Temperature Dependence of the Viscosity of Poly (N,N-diethylacrylamide) Solutions

1.
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou　730000

Received Date: 4 January 2002
Available Online: 15 September 2002

Linear Poly(N,N-diethylacrylamide)(PDEA) was synthesized by radical polymerization. The temperature dependence of the relative viscosity of PDEA-THF, PDEA-H2O and PDEA-THF-H2O solutions was investigated. Our results showed that the viscosity of PDEA in three different solvents was influenced differently by temperature. The relative viscosity of PDEA-THF solution increased with increasing temperature, while that of PDEA- H2O and PDEA-THF-H2O showed the inverse trend, namely, increasing of temperature led to the decreasing of viscosity, at the same time, the phenomenon of transparent-opaque transition could be observed as the volume fraction of THF (φTHF) was less than 0.7. For PDEA-THF-H2O solution, on the other hand, the transparent-opaque transition temperature increased with the increasing of φTHF. However, when φTHF was 0.7, the transparent-opaque transition phenomenon disappeared.
- Poly(N,N-diethylacrylamide);Solution property;Viscosity;Hydrogen bond;Lowest critical solution temperature
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