高分子共混体系相分离相结构的光散射研究
Light Scattering from Phase Structure of Phase Separation
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摘要: 本文基于Debye相关函数概念,引入一个有别于Debye型的相关函数Γ(r)=exp(-r/2D_m)cos(r/2D_m)。由此计算了散射光强变化,理论值和实验结果进行了比较,结果表明由新引入的相关函数得到的散射光强可很好地描述高分子共混体系相分离散射行为,在大波矢处具有I(q)~q~(-4)的渐近行为,相关函数的参数物理意义明确。Abstract: From Correlation function the static scattering intensity distrbution I(q) of spinodal decomposition in a binary polymer blend is obtained. It is shown that the scattering intensity relation describes experimental literature data remarkably well without f