MEAN-FIELD ISING CROSSOVER AND THE CRITICAL EXPONENT-GAMMA, EXPONENT-NU, AND EXPONENT-ETA FOR A POLYMER BLEND - D-PB/PS STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING

被引：70

作者：

JANSSEN, S

SCHWAHN, D

SPRINGER, T

机构：

[1] Forschungszentrum J̈lich Gesellschaft Mit Beschränker Haftung, Institut F̈r Festkörperforschung, W-5170 J̈lich

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.68.3180

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The critical behavior of the polymer blend d-PB/PS was investigated by small-angle neutron scattering experiments. 3D Ising behavior was clearly observed with the critical exponents gamma = 1.26 +/- 0.01, nu = 0.59 +/- 0.01, and eta = 0.047 +/- 0.004. The crossover to mean-field behavior occurs at T* = T(c) + 5.4 K. This is compared with the results of other experiments and the Landau-Ginzburg criterion. The Q dependence of the structure factor S(Q) follows the Ornstein-Zernike form in both regimes.

引用

页码：3180 / 3183

页数：4

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