物理化学学报 >> 1988, Vol. 4 >> Issue (04): 366-369.doi: 10.3866/PKU.WHXB19880408

研究论文 上一篇    下一篇

环形聚苯乙烯的稀溶液性质——Ⅰ. 环己烷溶液的θ温度

张浩; 贺智端   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1986-12-01 修回日期:1987-05-30 发布日期:1988-08-15
  • 通讯作者: 贺智端

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
  • Contact: He Zhiduan

摘要: 本工作采用光散射测定第二维利系数的方法, 确定了环形聚苯乙烯在环己烷溶液中的θ温度为30 ℃, 比线形聚苯乙烯的θ温度低4.5 ℃。在此温度下及35 ℃, 环形聚苯乙烯(1×10~4[η]=5.10×10~(-2) M_W~(0.508)), cm~3g~(-1) [η]=2.70×10~(-2) M_W~(0.576)), cm~3g~(-1)

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.