NUCLEAR-REACTION ANALYSIS - A STUDY ON THE INTERFACE FORMATION IN POLYMER MIXTURES BELOW THE CRITICAL-POINT

被引：13

作者：

STEINER, U ^{[1
]}

CHATURVEDI, UK ^{[1
]}

ZAK, O ^{[1
]}

KRAUSCH, G ^{[1
]}

SCHATZ, G ^{[1
]}

KLEIN, J ^{[1
]}

机构：

[1] UNIV CONSTANCE,FAK PHYS,W-7750 CONSTANCE,GERMANY

来源：

MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA | 1991年 / 45卷

关键词：

D O I：

10.1002/masy.19910450128

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We describe a method for directly determining the composition profile of deuterated polymer chains in polymer mixtures. Our technique, nuclear reaction analysis, is based on the H-2(He-3, He-4)H-1 nuclear reaction. By detecting He-4 in a forward geometry, we achieve a spatial resolution of 14 nm (FWHM). We use this technique to probe the broadening of the interface between two partially miscible polymers. We found that such a system attains a finite interfacial width in equilibrium. For short times, we monitor the dynamics of interface formation. We found that the interfacial width increases significantly slower than in the case of free diffusion.

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收藏

页码：283 / 288

页数：6

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