Acta Phys. -Chim. Sin. ›› 1988, Vol. 4 ›› Issue (04): 366-369.doi: 10.3866/PKU.WHXB19880408

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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:1986-12-01 Revised:1987-05-30 Published:1988-08-15
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Abstract: 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.