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THE SCALING BEHAVIOR OF CRITICAL ADSORPTION IN CRITICAL POLYMER SOLUTIONS

机译:关键聚合物溶液中临界吸附的尺度行为

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The critical adsorption ellipsometric measurements of five solutions of polystyrene in cyclohexane for different polystyrene molecular weights collapse to a single universal curve when scaled as a function of n(B) xi/lambda, where n(B) is the polymer solution refractive index, xi = xi(o)N(n)t(-nu) is the correlation length, and lambda is the wavelength of incident light in vacuum. From this universal feature we deduce the value of the polymerization critical exponent n = 0.258 +/- 0.017. We consider both the volume fraction order parameter (phi) and a symmetrized order parameter (psi(s)) together with both the renormalization group (RG) and Monte Carlo (MC) simulation forms for the surface scaling function P-+(x). The symmetrized order parameter gives significantly better agreement with experiment than the volume fraction order parameter. The combination of RG and psi(s) provides better agreement with experiment than does the combination of MC and psi(s). (C) 1996 American institute of Physics. [References: 43]
机译:当按n(B)xi / lambda的比例缩放时,对于不同的聚苯乙烯分子量,五种聚苯乙烯在环己烷中的溶液的临界吸附椭圆光度测量会塌陷为一条通用曲线,其中n(B)是聚合物溶液的折射率xi = xi(o)N(n)t(-nu)是相关长度,λ是真空中入射光的波长。从这个通用特征,我们得出聚合反应临界指数n = 0.258 +/- 0.017的值。我们考虑体积分数阶参数(phi)和对称阶参数(psi(s))以及表面缩放函数P-+(x)的重归一化组(RG)和蒙特卡洛(MC)模拟形式。对称顺序参数与体积分数顺序参数相比,与实验的一致性更好。 RG和psi的组合比MC和psi的组合提供了更好的实验一致性。 (C)1996年美国物理研究所。 [参考:43]

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