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Citation: Zhang Hao, He Zhiduan. DILUTE SOLUTION PROPERTIES OF RING-SHAPED POLYSTYRENE Ⅰ. θ Temperature in Cyclohexane Solution[J]. Acta Physico-Chimica Sinica, ;1988, 4(04): 366-369. doi: 10.3866/PKU.WHXB19880408 shu

DILUTE SOLUTION PROPERTIES OF RING-SHAPED POLYSTYRENE Ⅰ. θ Temperature in Cyclohexane Solution

Zhang Hao ,
He Zhiduan

1.
Changchun Institute of Applied Chemistry; Academia Sinica

Received Date: 1 December 1986
Available Online: 15 August 1988

The second virial coefficients of ring-shaped polystyrene in cyclohexane were determined at different temperature using low angle laser light scattering photometer (LALLS). The temperature obtained at which the second virial coefficient equals zero is 30 ℃. That is the θ temperature of ring-shaped polystyrene in cyclohexane solution. It is 4.5 ℃ lower than that of linear polystyrene (34.5 ℃). The Mark-Houwink equation of ringshaped polystyrene in cyclohexane at 30 ℃ and 35 ℃ were determined. They are
[η]=5.10×10~(-2) M_W~(0.508), cm~3 g~(-1) [η]=2.70×10~(-2) M_W~(0.576), cm~3 g~(-1)
respectively.
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