USTC 中斜爹执术大学 0ER画0回F画A@回回F画0A 高分子的0溶液 主讲:朱平平
高分子的 θ溶液 主讲 :朱平平
The Nobel Prize in Chemistry 1974 For his fundamental achievements both theoretical and experimental in the physical chemistry of the macromolecules Paul J Flory 1910~1985 Flory温度:=k7/v1
The Nobel Prize in Chemistry 1974 “For his fundamental achievements, both theoretical and experimental, in the physical chemistry of the macromolecules” Paul J.Flory 1910~1985 Flory温度 : θ = κ ψ 1 1 T
θ溶液—高分子的“理想溶液” θ溶液中的高分子链是处于“无扰”状态 的高斯线团 排斥体积u=0; 第二维利系数A2=0 过量化学位△2=0 理想的参比状态
θ溶液—高分子的“理想溶液” • θ溶液中的高分子链是处于“无扰”状态 的高斯线团； • 排斥体积 ； • 第二维利系数 ； • 过量化学位 ； u = 0 2 A = 0 1 0 E ∆µ = 理想的参比状态
高斯链 无规行走模型RW( random walk) W(h)= exp(-B2h2)4th V丌 2 h2∞M NGo(, 0, cos p, sin q) Go:几何因子(近程结构、柔性、近程相互作用) 没有考虑链单元的体积、链单元间的远程 相互作用
高斯链 无规行走模型 RW (random walk） ( ) 3 2 2 2 W h( ) exp h 4 h β β π π ⎛ ⎞ = − ⋅ ⎜ ⎟ ⎝ ⎠ 2 0 h M∝ ( ) 20 0 h N= ⋅G l, , θ cosϕ ϕ ,sin G0 G0：几何因子(近程结构、柔性、近程相互作用) 没有考虑链单元的体积、链单元间的远程 相互作用
Flory: The effect of excluded volume The configuration on the left represents the random coil in absence of volume exclusion, the chain being equivalent to a line in space In the sketch on the right, the units of the chain occupy finite domains from which other units are excluded. with the result that the average size of the configuration is increased
Flory: The effect of excluded volume The configuration on the left represents the random coil in absence of volume exclusion, the chain being equivalent to a line in space. In the sketch on the right, the units of the chain occupy finite domains from which other units are excluded, with the result that the average size of the configuration is increased